☆ 4.4 Article

Hydrophobic silica aerogel production at KEK

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT (2012)

Journal

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT

Volume 668, Issue -, Pages 64-70

Publisher

ELSEVIER

DOI: 10.1016/j.nima.2011.12.017

Keywords

Silica aerogel; Refractive index; Cherenkov radiator; Dust collector; SAXS

Categories

Instruments & Instrumentation Nuclear Science & Technology Physics, Nuclear Physics, Particles & Fields

Funding

Japan Society for the Promotion of Science (JSPS) [07J02691, 17540284, 19540317]
Ministry of Education, Culture, Sports, Science and Technology (MEXT) [21105005]
National Institute of Natural Sciences (NINS) of Japan
Grants-in-Aid for Scientific Research [17540284, 21105005, 19540317, 07J02691] Funding Source: KAKEN

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Abstract

We present herein a characterization of a standard method used at the High Energy Accelerator Research Organization (KEK) to produce hydrophobic silica aerogels and expand this method to obtain a wide range of refractive index (n=1.006-1.14). We describe in detail the entire production process and explain the methods used to measure the characteristic parameters of aerogels, namely the refractive index, transmittance, and density. We use a small-angle X-ray scattering (SAXS) technique to relate the transparency to the fine structure of aerogels. (C) 2011 Elsevier B.V. All rights reserved.

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Article Astronomy & Astrophysics

Measurement of the branching fractions of the B+ → ηl+νl and B+ → η′l+νl decays with signal-side only reconstruction in the full q2 range

U. Gebauer, C. Beleno, A. Frey, I Adachi, K. Adamczyk, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V Babu, S. Bahinipati, P. Behera, K. Belous, J. Bennett, M. Bessner, V Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, M. Campajola, L. Cao, D. Cervenkov, M-C Chang, V Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S-J Cho, S-K Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, N. Dash, G. De Nardo, F. Di Capua, J. Dingfelder, Z. Dolezal, T. Dong, S. Eidelman, D. Epifanov, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, K. Gudkova, C. Hadjivasiliou, S. Halder, T. Hara, O. Hartbrich, K. Hayasaka, H. Hayashii, M. T. Hedges, W-S Hou, C-L Hsu, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, C. W. Joo, K. K. Joo, J. Kahn, A. B. Kaliyar, K. H. Kang, G. Karyan, T. Kawasaki, H. Kichimi, C. Kiesling, C. H. Kim, D. Y. Kim, S. H. Kim, Y-K Kim, K. Kinoshita, P. Kodys, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Krizan, R. Kroeger, P. Krokovny, T. Kuhr, M. Kumar, R. Kumar, K. Kumara, A. Kuzmin, Y-J Kwon, K. Lalwani, J. S. Lange, I. S. Lee, S. C. Lee, P. Lewis, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, C. MacQueen, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, F. Metzner, K. Miyabayashi, R. Mizuk, G. B. Mohanty, M. Mrvar, R. Mussa, M. Nakao, Z. Natkaniec, A. Natochii, L. Nayak, M. Nayak, N. K. Nisar, S. Nishida, K. Nishimura, S. Ogawa, H. Ono, Y. Onuki, P. Oskin, P. Pakhlov, G. Pakhlova, S. Pardi, H. Park, S-H Park, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, E. Prencipe, M. T. Prim, M. Purohit, M. Roehrken, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, S. Sandilya, A. Sangal, L. Santelj, T. Sanuki, V Savinov, G. Schnell, J. Schueler, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, C. Sharma, J-G Shiu, B. Shwartz, F. Simon, E. Solovieva, S. Stanic, M. Staric, Z. S. Stottler, T. Sumiyoshi, M. Takizawa, U. Tamponi, F. Tenchini, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, R. Van Tonder, G. Varner, K. E. Varvell, A. Vossen, E. Waheed, C. H. Wang, M-Z Wang, P. Wang, X. L. Wang, S. Watanuki, J. Wiechczynski, E. Won, X. Xu, B. D. Yabsley, W. Yan, S. B. Yang, H. Ye, J. H. Yin, C. Z. Yuan, Z. P. Zhang, V Zhilich, V Zhukova

Summary: The branching fractions of B+ meson decays were measured, showing values on the order of 10^(-5). The method used in this experiment aims to reduce the dependence on form factor models.

PHYSICAL REVIEW D (2022)

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Article Astronomy & Astrophysics

Search for the decay Bs0 → η′KS0

T. Pang, V Savinov, I Adachi, H. Aihara, D. M. Asner, H. Atmacan, V Aulchenko, T. Aushev, R. Ayad, V Babu, P. Behera, K. Belous, M. Bessner, V Bhardwaj, B. Bhuyan, T. Bilka, A. Bobrov, D. Bodrov, G. Bonvicini, J. Borah, A. Bozek, P. Branchini, T. E. Browder, A. Budano, M. Campajola, P. Chang, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S-J Cho, S-K Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. Dolezal, T. Dong, D. Dossett, S. Dubey, D. Epifanov, T. Ferber, A. Frey, B. G. Fulsom, R. Garg, V Gaur, N. Gabyshev, A. Giri, P. Goldenzweig, E. Graziani, T. Gu, K. Gudkova, C. Hadjivasiliou, S. Halder, K. Hayasaka, H. Hayashii, M. T. Hedges, C-L Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, E-J Jang, S. Jia, Y. Jin, K. K. Joo, J. Kahn, D. Kalita, A. B. Kaliyar, K. H. Kang, G. Karyan, T. Kawasaki, C. Kiesling, C. H. Kim, D. Y. Kim, K-H Kim, Y-K Kim, K. Kinoshita, P. Kodys, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Krizan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kumar, K. Kumara, A. Kuzmin, Y-J Kwon, Y-T Lai, T. Lam, J. S. Lange, S. C. Lee, C. H. Li, J. Li, L. K. Li, Y. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, A. Martini, M. Masuda, T. Matsuda, D. Matvienko, F. Meier, M. Merola, F. Metzner, K. Miyabayashi, R. Mizuk, G. B. Mohanty, R. Mussa, M. Nakao, Z. Natkaniec, A. Natochii, L. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, K. Ogawa, S. Ogawa, H. Ono, P. Oskin, P. Pakhlov, G. Pakhlova, S. Pardi, H. Park, S-H Park, A. Passeri, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, V Popov, E. Prencipe, M. T. Prim, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, S. Sandilya, A. Sangal, L. Santelj, T. Sanuki, G. Schnell, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, C. Sharma, C. P. Shen, J-G Shiu, F. Simon, J. B. Singh, A. Sokolov, E. Solovieva, S. Stanic, J. F. Strube, M. Sumihama, T. Sumiyoshi, M. Takizawa, U. Tamponi, K. Tanida, N. Taniguchi, F. Tenchini, K. Trabelsi, M. Uchida, K. Uno, S. Uno, P. Urquijo, R. Van Tonder, G. Varner, A. Vinokurova, E. Waheed, E. Wang, M-Z Wang, X. L. Wang, M. Watanabe, S. Watanuki, E. Won, X. Xu, B. D. Yabsley, W. Yan, H. Ye, J. Yelton, J. H. Yin, C. Z. Yuan, Y. Zhai, Z. P. Zhang, V Zhilich, V Zhukova

Summary: We present the first search for the decay B-s(0) -> eta'K-S(0), and no signal is observed. A 90% confidence-level upper limit of 8.16 x 10(-6) is set on the branching fraction of B-s(0) -> eta'K-S(0).

PHYSICAL REVIEW D (2022)

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Article Astronomy & Astrophysics

Search for the radiative penguin decays B0 → KS0KS0γ in the Belle experiment

H. B. Jeon, K. H. Kang, H. Park, I Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V Babu, S. Bahinipati, P. Behera, K. Belous, J. Bennett, F. Bernlochner, M. Bessner, V Bhardwaj, B. Bhuyan, T. Bilka, A. Bobrov, D. Bodrov, J. Borah, A. Bozek, M. Bracko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Cervenkov, M-C Chang, P. Chang, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S-J Cho, S-K Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, N. Dash, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. Dolezal, T. Dong, D. Epifanov, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V Gaur, N. Gabyshev, A. Giri, P. Goldenzweig, B. Golob, E. Graziani, T. Gu, K. Gudkova, C. Hadjivasiliou, T. Hara, K. Hayasaka, H. Hayashii, M. T. Hedges, T. Higuchi, W-S Hou, C-L Hsu, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, E-J Jang, S. Jia, Y. Jin, K. K. Joo, J. Kahn, H. Kakuno, A. B. Kaliyar, T. Kawasaki, C. Kiesling, C. H. Kim, D. Y. Kim, K-H Kim, K. T. Kim, Y-K Kim, K. Kinoshita, P. Kodys, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Krizan, R. Kroeger, P. Krokovny, T. Kuhr, M. Kumar, K. Kumara, A. Kuzmin, Y-J Kwon, Y-T Lai, K. Lalwani, T. Lam, J. S. Lange, M. Laurenza, S. C. Lee, C. H. Li, J. Li, Y. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, A. Martini, M. Masuda, T. Matsuda, D. Matvienko, S. K. Maurya, M. Merola, F. Metzner, K. Miyabayashi, R. Mizuk, G. B. Mohanty, M. Nakao, D. Narwal, Z. Natkaniec, A. Natochii, L. Nayak, M. Nayak, N. K. Nisar, S. Nishida, K. Ogawa, S. Ogawa, H. Ono, Y. Onuki, P. Oskin, P. Pakhlov, G. Pakhlova, T. Pang, S. Pardi, S-H Park, A. Passeri, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, V Popov, E. Prencipe, M. T. Prim, M. Purohit, M. Rohrken, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, S. Sandilya, A. Sangal, L. Santelj, T. Sanuki, V Savinov, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, C. Sharma, V Shebalin, C. P. Shen, J-G Shiu, J. B. Singh, A. Sokolov, E. Solovieva, M. Staric, Z. S. Stottler, J. F. Strube, M. Sumihama, T. Sumiyoshi, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, S. E. Vahsen, R. Van Tonder, G. Varner, K. E. Varvell, A. Vinokurova, A. Vossen, E. Waheed, C. H. Wang, M-Z Wang, S. Watanuki, E. Won, B. D. Yabsley, W. Yan, S. B. Yang, H. Ye, J. Yelton, J. H. Yin, C. Z. Yuan, Y. Yusa, Y. Zhai, Z. P. Zhang, V Zhilich, V Zhukova

Summary: This study reports the first search results for the rare penguin-dominated decay mode, which may be caused by the production of tensor mesons and a photon. The search was conducted using a complete data sample, but no statistically significant signals were observed. Upper limits were obtained for various branching fractions.

PHYSICAL REVIEW D (2022)

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Article Astronomy & Astrophysics

Search for Z' → μ+μ- in the Lμ - Lτ gauge-symmetric model at Belle

T. Czank, I. Jaegle, A. Ishikawa, I. Adachi, K. Adamczyk, H. Aihara, D. M. Asner, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, J. Bennett, F. Bernlochner, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, M. Campajola, L. Cao, D. Cervenkov, M. -C. Chang, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, Y. Choi, S. Choudhury, D. Cinabro, S. Das, N. Dash, G. De Nardo, R. Dhamija, F. Di Capua, Z. Dolezal, T. Dong, S. Eidelman, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, O. Grzymkowska, Y. Guan, K. Gudkova, C. Hadjivasiliou, O. Hartbrich, K. Hayasaka, H. Hayashii, M. T. Hedges, M. Hernandez Villanueva, T. Higuchi, W. -S. Hou, C. -L. Hsu, T. Iijima, K. Inami, G. Inguglia, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, E. -J. Jang, S. Jia, Y. Jin, C. W. Joo, K. K. Joo, K. H. Kang, G. Karyan, T. Kawasaki, H. Kichimi, C. Kiesling, B. H. Kim, C. H. Kim, D. Y. Kim, K. -H. Kim, S. H. Kim, Y. -K. Kim, P. Kodys, I. Komarov, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Krizan, R. Kroeger, P. Krokovny, T. Kuhr, M. Kumar, K. Kumara, Y. -J. Kwon, Y. -T. Lai, J. S. Lange, I. S. Lee, S. C. Lee, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, T. Luo, C. MacQueen, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, F. Metzner, K. Miyabayashi, R. Mizuk, G. B. Mohanty, S. Mohanty, T. Mori, M. Mrvar, R. Mussa, M. Nakao, Z. Natkaniec, A. Natochii, L. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, H. Ono, Y. Onuki, P. Pakhlov, G. Pakhlova, T. Pang, S. Pardi, H. Park, S. -H. Park, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, V. Popov, E. Prencipe, M. T. Prim, M. Roehrken, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, S. Sandilya, A. Sangal, L. Santelj, T. Sanuki, V. Savinov, G. Schnell, J. Schueler, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, C. Sharma, V. Shebalin, C. P. Shen, J. -G. Shiu, B. Shwartz, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, Z. S. Stottler, M. Sumihama, T. Sumiyoshi, W. Sutcliffe, M. Takizawa, K. Tanida, Y. Tao, F. Tenchini, K. Trabelsi, M. Uchida, S. Uehara, T. Uglov, K. Uno, P. Urquijo, R. Van Tonder, G. Varner, A. Vossen, C. H. Wang, E. Wang, M. -Z. Wang, P. Wang, S. Watanuki, E. Won, X. Xu, B. D. Yabsley, H. Yamamoto, W. Yan, S. B. Yang, H. Ye, J. Yelton, J. H. Yin, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhukova, V Zhulanov

Summary: In this study, we conducted a search for the Z' gauge boson at the KEKB collider using a data sample collected by the Belle experiment. The Z' only couples to heavy leptons and their corresponding neutrinos. Unlike previous studies, we included the effects of initial state radiation in our signal simulation samples and did not observe any signal within the Z' mass range.

PHYSICAL REVIEW D (2022)

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Article Astronomy & Astrophysics

First test of lepton flavor universality in the charmed baryon decays Ωc0 → Ω-l+νl using data of the Belle experiment

Y. B. Li, C. P. Shen, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, K. Belous, J. Bennett, F. Bernlochner, M. Bessner, B. Bhuyan, T. Bilka, A. Bobrov, D. Bodrov, J. Borah, A. Bozek, M. Bracko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Cervenkov, M. -C. Chang, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. -J. Cho, S. -K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, N. Dash, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. Dolezal, T. V. Dong, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Giri, P. Goldenzweig, B. Golob, E. Graziani, K. Gudkova, C. Hadjivasiliou, T. Hara, K. Hayasaka, H. Hayashii, M. T. Hedges, W. -S. Hou, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, E. -J. Jang, S. Jia, Y. Jin, K. K. Joo, J. Kahn, K. H. Kang, T. Kawasaki, H. Kichimi, C. Kiesling, C. H. Kim, D. Y. Kim, K. -H. Kim, K. T. Kim, Y. -K. Kim, K. Kinoshita, P. Kodys, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Krizan, R. Kroeger, P. Krokovny, M. Kumar, R. Kumar, K. Kumara, A. Kuzmin, Y. -J. Kwon, K. Lalwani, T. Lam, M. Laurenza, S. C. Lee, J. Li, L. K. Li, Y. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, A. Martini, M. Masuda, D. Matvienko, S. K. Maurya, M. Merola, K. Miyabayashi, R. Mizuk, G. B. Mohanty, M. Nakao, D. Narwal, A. Natochii, L. Nayak, M. Nayak, N. K. Nisar, S. Nishida, K. Ogawa, S. Ogawa, H. Ono, P. Oskin, P. Pakhlov, G. Pakhlova, T. Pang, S. Pardi, S. -H. Park, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, E. Prencipe, M. T. Prim, M. Roehrken, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, S. Sandilya, A. Sangal, L. Santelj, V. Savinov, G. Schnell, J. Schueler, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, C. Sharma, V. Shebalin, J. -G. Shiu, B. Shwartz, J. B. Singh, A. Sokolov, E. Solovieva, M. Staric, Z. S. Stottler, M. Sumihama, T. Sumiyoshi, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, M. Uchida, T. Uglov, Y. Unno, K. Uno, S. Uno, P. Urquijo, S. E. Vahsen, R. Van Tonder, G. Varner, A. Vinokurova, E. Waheed, D. Wang, E. Wang, M. -Z. Wang, S. Watanuki, E. Won, X. Xu, B. D. Yabsley, W. Yan, S. B. Yang, H. Ye, J. Yelton, J. H. Yin, C. Z. Yuan, Y. Yusa, Y. Zhai, Z. P. Zhang, V. Zhilich, V. Zhukova

Summary: We report the first observation of the Omega(0)(c) -> Omega(-)mu(+)nu(mu) decay and measure the branching fraction ratios of the Omega(0)(c) -> Omega(-)l(+)nu(l) decays in comparison with the reference mode Omega(0)(c) -> Omega(-)pi(+), (l = e or mu). Using data samples collected at the KEKB e(+)e(-) collider, we extract the Omega(0)(c) signal yields and measure the branching fraction ratios to be 1.98 +/- 0.13(stat) +/- 0.08(syst) and 1.94 +/- 0.18(stat) +/- 0.10(syst) for Omega(0)(c) -> Omega(-)e(+)nu(e) and Omega(0)(c) -> Omega(-)mu(+)nu(mu), respectively. The ratio of B(Omega(0)(c) -> Omega(-)e(+)nu(e))/B(Omega c0 -> Omega(-)mu(+)nu(mu)) is measured to be 1.02 +/- 0.10(stat) +/- 0.02(syst), which is consistent with lepton flavor universality.

PHYSICAL REVIEW D (2022)

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Article Astronomy & Astrophysics

Measurement of the branching fraction and CP asymmetry for B → (D)over-bar0π decays

T. Bloomfield, M. E. Sevior, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, J. Bennett, M. Bessner, T. Bilka, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, M. Campajola, L. Cao, D. Cervenkov, M. -C Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. -J. Cho, S. -K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, N. Dash, G. De Nardo, R. Dhamija, F. Di Capua, Z. Dolezal, T. V. Dong, S. Dubey, S. Eidelman, D. Epifanov, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, C. Hadjivasiliou, S. Halder, O. Hartbrich, K. Hayasaka, H. Hayashii, M. T. Hedges, M. Hernandez Villanueva, W. -S. Hou, C. -L. Hsu, T. Iijima, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, E. -J. Jang, S. Jia, Y. Jin, C. W. Joo, K. K. Joo, A. B. Kaliyar, K. H. Kang, G. Karyan, T. Kawasaki, C. H. Kim, D. Y. Kim, H. J. Kim, S. H. Kim, Y. -K. Kim, T. D. Kimmel, P. Kodys, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Krizan, R. Kroeger, P. Krokovny, M. Kumar, R. Kumar, K. Kumara, Y. -J. Kwon, K. Lalwani, J. S. Lange, I. S. Lee, S. C. Lee, C. H. Li, J. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, T. Luo, C. MacQueen, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, F. Metzner, K. Miyabayashi, R. Mizuk, G. B. Mohanty, S. Mohanty, H. K. Moon, R. Mussa, M. Nakao, Z. Natkaniec, A. Natochii, L. Nayak, M. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, H. Ono, Y. Onuki, P. Oskin, P. Pakhlov, G. Pakhlova, S. Pardi, H. Park, S. -H. Park, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, V. Popov, E. Prencipe, M. T. Prim, M. Ritter, A. Rostomyan, N. Rout, M. Rozanska, G. Russo, D. Sahoo, Y. Sakai, S. Sandilya, A. Sangal, L. Santelj, T. Sanuki, V. Savinov, G. Schnell, J. Schueler, C. Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, M. Shapkin, C. Sharma, C. P. Shen, J. -G. Shiu, B. Shwartz, F. Simon, A. Sokolov, E. Solovieva, M. Staric, Z. S. Stottler, J. F. Strube, M. Sumihama, K. Sumisawa, T. Sumiyoshi, W. Sutcliffe, M. Takizawa, K. Tanida, Y. Tao, F. Tenchini, K. Trabelsi, M. Uchida, K. Uno, S. Uno, Y. Usov, S. E. Vahsen, R. Van Tonder, G. Varner, K. E. Varvell, A. Vossen, E. Waheed, C. H. Wang, E. Wang, M. -Z. Wang, P. Wang, M. Watanabe, S. Watanuki, O. Werbycka, J. Wiechczynski, E. Won, X. Xu, B. D. Yabsley, W. Yan, S. B. Yang, H. Ye, J. H. Yin, C. Z. Yuan, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov

Summary: In this study, the branching fractions and CP asymmetries for the decays B-0 -> (D) over bar (0)pi(0) and B+ -> (D) over bar (0)pi(+) are measured using the Belle detector at the KEKB e(+)e(-) collider. The results show that the measurements of B are the most precise to date and are in agreement with previous results, indicating the validity of the Standard Model expectations.

PHYSICAL REVIEW D (2022)

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Article Astronomy & Astrophysics

Measurements of the branching fractions of Ξc0 → ΛKS0, Ξc0 → Σ0KS0, and Ξc0 → Σ+K- decays at Belle

Y. Li, J. X. Cui, S. Jia, C. P. Shen, I. Adachi, J. K. Ahn, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, A. Bobrov, D. Bodrov, G. Bonvicini, J. Borah, A. Bozek, M. Bracko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Cervenkov, M. -C. Chang, P. Chang, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. -J. Cho, S. -K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. Dolezal, T. V. Dong, D. Dossett, D. Epifanov, T. Ferber, A. Frey, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Giri, P. Goldenzweig, T. Gu, K. Gudkova, C. Hadjivasiliou, S. Halder, O. Hartbrich, K. Hayasaka, H. Hayashii, M. T. Hedges, W. -S Hou, C. -L. Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, E. -J. Jang, Y. Jin, K. K. Joo, J. Kahn, A. B. Kaliyar, T. Kawasaki, C. Kiesling, C. H. Kim, D. Y. Kim, K. -H. Kim, Y. -K. Kim, K. Kinoshita, P. Kodys, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Krizan, R. Kroeger, P. Krokovny, T. Kuhr, M. Kumar, R. Kumar, K. Kumara, A. Kuzmin, Y. -J. Kwon, Y. -T. Lai, T. Lam, J. S. Lange, M. Laurenza, S. C. Lee, C. H. Li, J. Li, L. K. Li, Y. B. Li, L. Li Gioi, J. K. Lieret, D. Liventsev, A. Martini, M. Masuda, T. Matsuda, D. Matvienko, F. Meier, M. Merola, F. Metzner, K. Miyabayashi, R. Mizuk, G. B. Mohanty, R. Mussa, M. Nakao, Z. Natkaniec, A. Natochii, L. Nayak, M. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, K. Ogawa, S. Ogawa, H. Ono, P. Oskin, P. Pakhlov, G. Pakhlova, T. Pang, S. Pardi, S. -H. Park, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, V. Popov, E. Prencipe, M. T. Prim, M. Rohrken, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, S. Sandilya, A. Sangal, L. Santelj, T. Sanuki, V. Savinov, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, C. Sharma, J. -G. Shiu, B. Shwartz, J. B. Singh, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, Z. S. Stottler, J. F. Strube, M. Sumihama, T. Sumiyoshi, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, M. Uchida, Y. Unno, K. Uno, S. Uno, P. Urquijo, Y. Usov, R. Van Tonder, G. Varner, A. Vinokurova, E. Waheed, E. Wang, M. -Z. Wang, M. Watanabe, S. Watanuki, O. Werbycka, E. Won, B. D. Yabsley, W. Yan, S. B. Yang, H. Ye, J. Yelton, C. Z. Yuan, Y. Zhai, Z. P. Zhang, V. Zhilich, V. Zhukova

Summary: Using data from the BELLE detector at the KEKB collider, this study measured the branching fractions of several decays of Xi c(0). New branching fraction ratios were measured for the first time, and absolute branching fractions were determined when considering the normalization mode.

PHYSICAL REVIEW D (2022)

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Article Astronomy & Astrophysics

Search for the decay Bs0 → ηη

B. Bhuyan, K. J. Nath, J. Borah, I Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V Aulchenko, T. Aushev, R. Ayad, V Babu, I Badhrees, A. M. Bakich, P. Behera, J. Bennett, V Bhardwaj, T. Bilka, J. Biswal, A. Bobrov, A. Bozek, M. Bracko, T. E. Browder, M. Campajola, V Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S-K Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, N. Dash, F. Di Capua, S. Di Carlo, Z. Dolezal, T. Dong, S. Dubey, S. Eidelman, J. E. Fast, T. Ferber, B. G. Fulsom, V Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, J. Haba, T. Hara, O. Hartbrich, K. Hayasaka, H. Hayashii, W-S Hou, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, D. Joffe, K. K. Joo, A. B. Kaliyar, K. H. Kang, G. Karyan, T. Kawasaki, H. Kichimi, C. Kiesling, D. Y. Kim, H. J. Kim, K. T. Kim, S. H. Kim, K. Kinoshita, P. Kodys, S. Korpar, D. Kotchetkov, P. Krizan, R. Kroeger, P. Krokovny, R. Kumar, A. Kuzmin, Y-J Kwon, J. S. Lange, J. K. Lee, J. Y. Lee, S. C. Lee, C. H. Li, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, P-C Lu, T. Luo, J. MacNaughton, C. MacQueen, M. Masuda, D. Matvienko, M. Merola, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, T. Mori, R. Mussa, T. Nakano, M. Nakao, M. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, K. Ogawa, S. Ogawa, H. Ono, Y. Onuki, P. Pakhlov, G. Pakhlova, B. Pal, T. Pang, S. Pardi, H. Park, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, V Popov, E. Prencipe, M. Ritter, A. Rostomyan, G. Russo, Y. Sakai, M. Salehi, S. Sandilya, L. Santelj, T. Sanuki, V Savinov, O. Schneider, G. Schnell, J. Schueler, C. Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, M. E. Sevior, V Shebalin, C. P. Shen, J-G Shiu, E. Solovieva, T. Sumiyoshi, W. Sutcliffe, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, S. E. Vahsen, R. Van Tonder, G. Varner, A. Vossen, C. H. Wang, M-Z Wang, P. Wang, J. Wiechczynski, E. Won, S. B. Yang, H. Ye, J. H. Yin, Y. Yusa, Z. P. Zhang, V Zhilich, V Zhukova

Summary: In this study, we searched for the B-s(0) -> eta eta decay using data collected at the Upsilon(5S) resonance with the Belle detector at the KEKB collider. No signal was observed and an upper limit on the branching fraction of 14.3 x 10(-5) was set at 90% confidence level. This result represents a significant improvement over previous limits.

PHYSICAL REVIEW D (2022)

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Article Astronomy & Astrophysics

Study of (B)over-bar0 → D+h- (h = K/π) decays at Belle

E. Waheed, P. Urquijo, I Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V Aulchenko, T. Aushev, S. Bahinipati, P. Behera, K. Belous, J. Bennett, M. Bessner, V Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal, A. Bobrov, D. Bodrov, J. Borah, A. Bozek, M. Bracko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Cervenkov, M-C Chang, P. Chang, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S-J Cho, S-K Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, Z. Dolezal, T. Dong, D. Epifanov, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V Gaur, N. Gabyshev, A. Giri, P. Goldenzweig, B. Golob, E. Graziani, T. Gu, Y. Guan, K. Gudkova, C. Hadjivasiliou, S. Halder, O. Hartbrich, K. Hayasaka, H. Hayashii, W-S Hou, C-L Hsu, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, K. K. Joo, A. B. Kaliyar, K. H. Kang, H. Kichimi, C. H. Kim, D. Y. Kim, K-H Kim, K. T. Kim, Y-K Kim, K. Kinoshita, P. Kodys, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Krizan, R. Kroeger, P. Krokovny, M. Kumar, R. Kumar, K. Kumara, Y-J Kwon, Y-T Lai, J. S. Lange, M. Laurenza, S. C. Lee, J. Li, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, C. MacQueen, M. Masuda, T. Matsuda, M. Merola, F. Metzner, K. Miyabayashi, R. Mizuk, G. B. Mohanty, R. Mussa, M. Nakao, A. Natochii, L. Nayak, M. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, S. Ogawa, H. Ono, P. Oskin, P. Pakhlov, G. Pakhlova, T. Pang, H. Park, S-H Park, A. Passeri, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, V Popov, E. Prencipe, M. T. Prim, M. Rohrken, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, S. Sandilya, L. Santelj, T. Sanuki, V Savinov, G. Schnell, C. Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, C. Sharma, C. P. Shen, J-G Shiu, F. Simon, J. B. Singh, A. Sokolov, E. Solovieva, Z. S. Stottler, J. F. Strube, M. Sumihama, T. Sumiyoshi, W. Sutcliffe, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, K. Uno, S. Uno, Y. Usov, S. E. Vahsen, R. Van Tonder, G. Varner, K. E. Varvell, A. Vinokurova, C. H. Wang, E. Wang, M-Z Wang, P. Wang, X. L. Wang, J. Wiechczynski, E. Won, B. D. Yabsley, W. Yan, S. B. Yang, H. Ye, J. Yelton, J. H. Yin, Y. Yusa, Z. P. Zhang, V Zhilich, V Zhukova

Summary: This article presents measurements of the branching fractions of Cabibbo favored and Cabibbo suppressed decays. The analysis was performed using the Belle dataset and the Belle II software framework, resulting in the determination of the branching ratios and the ratio between the two decays.

PHYSICAL REVIEW D (2022)

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Article Astronomy & Astrophysics

Measurement of B(Bs → DsX) with Bs semileptonic tagging

B. Wang, K. Kinoshita, H. Aihara, D. M. Asner, T. Aushev, R. Ayad, V Babu, I Badhrees, A. M. Bakich, P. Behera, C. Beleno, J. Bennett, M. Bessner, V Bhardwaj, T. Bilka, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, M. Campajola, L. Cao, A. Chen, K. Chilikin, H. E. Cho, K. Cho, S-K Choi, Y. Choi, D. Cinabro, S. Cunliffe, N. Dash, F. Di Capua, S. Di Carlo, Z. Dolezal, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, B. G. Fulsom, R. Garg, V Gaur, A. Garmash, A. Giri, P. Goldenzweig, Y. Guan, K. Hayasaka, H. Hayashii, W-S Hou, K. Inami, A. Ishikawa, M. Iwasaki, Y. Iwasaki, S. Jia, Y. Jin, D. Joffe, K. K. Joo, A. B. Kaliyar, K. H. Kang, G. Karyan, C. Kiesling, D. Y. Kim, K. T. Kim, S. H. Kim, P. Kodys, S. Korpar, D. Kotchetkov, P. Krizan, R. Kroeger, P. Krokovny, T. Kuhr, A. Kuzmin, Y-J Kwon, J. S. Lange, I. S. Lee, J. Y. Lee, S. C. Lee, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, T. Luo, J. MacNaughton, C. MacQueen, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, K. Miyabayashi, R. Mizuk, G. B. Mohanty, R. Mussa, M. Nakao, K. J. Nath, M. Nayak, N. K. Nisar, S. Nishida, K. Nishimura, S. Ogawa, H. Ono, Y. Onuki, G. Pakhlova, B. Pal, T. Pang, S. Pardi, H. Park, S-H Park, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, V Popov, E. Prencipe, M. Prim, M. Ritter, A. Rostomyan, G. Russo, S. Sandilya, L. Santelj, T. Sanuki, V Savinov, O. Schneider, G. Schnell, C. Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, M. E. Sevior, V Shebalin, J-G Shiu, A. Sokolov, E. Solovieva, J. F. Strube, T. Sumiyoshi, M. Takizawa, K. Tanida, F. Tenchini, T. Uglov, S. Uno, Y. Usov, R. Van Tonder, G. Varner, A. Vinokurova, E. Waheed, C. H. Wang, M-Z Wang, P. Wang, O. Werbycka, E. Won, S. B. Yang, H. Ye, Y. Yusa, Z. P. Zhang, V Zhilich, V Zhukova, V Zhulanov

Summary: This study reports the first direct measurement of the inclusive branching fraction B(B-s -> DsX) via B-s tagging. The tagging is accomplished through a partial reconstruction of semileptonic decays B-s -> D(s)Xl nu. With the analysis of 121.4 fb⁻¹ data collected at the gamma(5S) resonance, the obtained value for B(B-s -> DsX) is (60.2 +/- 5.8 +/- 2.3)%, with the first uncertainty being statistical and the second being systematic.

PHYSICAL REVIEW D (2022)

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Article Instruments & Instrumentation

An improved hybrid photon detector based on a SiC Schottky diode

Jinlu Ruan, Liang Chen, Pengxiao Xu, Yapeng Zhang, Xue Du, Hongqiao Yin, Shiyi He, Fangbao Wang, Xun Zhang, Xiaoping Ouyang

Summary: A new SiC detector with a faster time response was developed to improve the temporal response of SiC-HPMTs. The improved SiC-HPMT showed significantly enhanced temporal response compared to the previous SiC-HPMT, and it can accurately measure the time information of fast pulsed radiation fields.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT (2024)

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Article Instruments & Instrumentation

The Phase-2 upgrade of the CMS outer tracker

Kevin Nash

Summary: This article discusses the need for extensive upgrades of the LHC detectors, particularly the Outer Tracker, due to the demanding conditions and radiation of the High Luminosity LHC scenario. The design choices, technological approaches, and R&D activities for the Outer Tracker Phase-2 upgrade are highlighted.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT (2024)

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Article Instruments & Instrumentation

The LHCb RICH upgrade for the high luminosity LHC era

S. A. Wotton

Summary: The hadron particle identification provided by LHCb's RICH system is crucial for the success of the experiment, and it will continue to play a significant role in Upgrade II. To maintain the current excellent particle identification performance, substantial improvements in the precision of measuring the space and time coordinates of detected photons in the RICH and in the resolution of the reconstructed Cherenkov angle are required.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT (2024)

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Article Instruments & Instrumentation

The Resistive Cylindrical Chamber

R. Cardarelli, A. Rocchi, G. Aielli, P. Camarri, A. Di Ciaccio, L. Di Stante, B. Liberti, E. Pastori, L. Pizzimento, G. Proto

Summary: The Resistive Cylindrical Chamber (RCC) is a new generation of gaseous particle detectors that overcome the limitations of Resistive Plate Chambers (RPC) and expand their application range. By transitioning from planar to cylindrical geometry, while maintaining an almost planar electric field, the RCC achieves improved detection efficiency, increased gas pressure, and the possibility of using eco-friendly gases.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT (2024)

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Article Instruments & Instrumentation

An aerogel RICH detector for the next generation heavy-ion experiment at LHC

Giacomo Volpe

Summary: The ALICE collaboration is proposing a new apparatus, ALICE 3, to investigate the Quark Gluon Plasma (QGP) properties. In this context, conceptual studies for the development of a RICH detector for ALICE 3 are ongoing. The proposed baseline layout is a proximity-focusing RICH, using aerogel as Cherenkov radiator and Silicon Photomultipliers for photon detection. The detector specifications and performance obtained by Monte Carlo simulation are presented, along with the R&D challenges related to the design.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT (2024)

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Article Instruments & Instrumentation

A practical method of evaluating work functions

M. G. Mazarakis, E. Jongewaard, J. Ellsworth

Summary: This report presents experimental data and a step-by-step technique for evaluating the work functions of thermionic cathodes. The experiments were conducted using small-sized thermionic cathodes provided by Spectra-Mat corporation. The cathode electron current emission work function is emphasized as a crucial parameter for selecting cathodes in various applications.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT (2024)

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Article Instruments & Instrumentation

Sub-millimeter resolution SiPM-based neutron anger camera

M. Loyd, A. Khaplanov, V. Sedov, J. Beal, T. Visscher, C. Donahue, C. Montcalm, G. Warren, R. Butz, C. Boone, C. Hart, R. Riedel, Y. Diawara

Summary: Thermal and cold neutron beamlines require detector systems with high efficiency, large active area, and good spatial resolution. This study presents a new design of Anger camera using silicon photomultipliers (SiPMs) instead of photomultiplier tubes (PMTs), offering better resolution, less distortion, and more compactness. The use of SiPMs also enables the camera to be used in strong magnetic fields, providing additional experimental capabilities.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT (2024)

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Article Instruments & Instrumentation

Vertical time-of-flight spectroscopy of ultracold neutrons

Thomas Neulinger, Hanno Filter, Oliver Zimmer

Summary: This paper describes the mathematical foundation for analyzing vertical time-of-flight (TOF) measurements using ultracold neutrons (UCN). It enables the spectroscopy of UCN with kinetic energies below the neutron optical potential of the detector entrance window. The paper provides general treatment methods and transformation rules for converting vertical TOF spectra into other spectra of interest.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT (2024)

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A comparative study on full-energy peak efficiency calibration methods for HPGe detector: Virtual point detector, curve fitting, and machine learning models

Huynh Dinh Chuong, Nguyen Huynh Duy Khang, Le Thi Ngoc Trang, Nguyen Thi Truc Linh, Truong Thanh Sang, Nguyen Thanh Dat, Hoang Duc Tam

Summary: This paper presents a comparative study of three models, including virtual point detector (VPD), curve fitting (CF), and machine learning (ML), in determining the full-energy peak efficiency (FEPE) of HPGe detector. The study found that the ML model outperforms VPD and CF models in terms of accuracy.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT (2024)

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Article Instruments & Instrumentation

Partially depleted operation of 250 μm-thick silicon carbide neutron detectors

M. H. Kushoro, M. Angelone, D. Bozzi, G. Gorini, F. La Via, E. Perelli Cippo, M. Pillon, M. Tardocchi, M. Rebai

Summary: This paper presents the characterization of a series of SiC detectors operated with partial polarization, achieving excellent energy resolution and detection characteristics for both alpha particles and neutrons. The results demonstrate the potential of SiC detectors for fast neutron detection in fusion experiments. The limitations and challenges for manufacturing thick SiCs in the future are also discussed.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT (2024)

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Article Instruments & Instrumentation

Characterization of LAPPD timing at CERN PS testbeam

Deb Sankar Bhattacharya, Andrea Bressan, Chandradoy Chatterjee, Silvia Dalla Torre, Mauro Gregori, Alexander Kiselev, Stefano Levorato, Anna Martin, Saverio Minutoli, Mikhail Osipenko, Richa Rai, Marco Ripani, Fulvio Tessarotto, Triloki Triloki

Summary: In this article, we report on the measurement of the time resolution of an LAPPD prototype using Cherenkov radiation emitted by high energy hadrons. Our approach has demonstrated the capability of measuring time resolutions as fine as 25-30 ps. The measured time resolution for single photoelectrons is about 80 ps r.m.s.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT (2024)

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Article Instruments & Instrumentation

Fabrication and characterization of self-supporting and backed 107Ag targets for lifetime measurements using RDM and DSAM

Bharti Rohila, S. R. Abhilash, Diwanshu, Chetan Sharma, Devinder Mehta, Ashok Kumar

Summary: Self-supporting and Au backed Ag-107 targets have been fabricated using a combination of cold rolling and e-beam melting technique. The method is efficient, resulting in targets without significant material loss or major contamination. Various techniques have been used for thickness measurements and characterizations, and one of the fabricated targets has been successfully used in a nuclear physics experiment.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT (2024)

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Article Instruments & Instrumentation

Reduction of light output of plastic scintillator tiles during irradiation at cold temperatures and in low-oxygen environments

B. Kronheim, A. Belloni, T. K. Edberg, S. C. Eno, C. Howe, C. Palmer, C. Papageorgakis, M. Paranjpe, S. Sriram

Summary: This paper presents measurements of the relative decrease of light output during irradiation of small plastic scintillator tiles read out by silicon photomultipliers. The study found substantial temporary damage during low-temperature irradiation, regardless of oxygen concentration and wrapping material. The wrapping material had an impact on the relative light loss, with the 3M(TM) Enhanced Specular Reflector Film showing the largest loss. The light loss was less at warmer temperatures and similar to that in standard atmosphere with 3% oxygen concentration. Evidence of a plateau in the radical density was seen for the data at 0 degrees C.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT (2024)

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Article Instruments & Instrumentation

Atomistic modelling of electron propagation and radiation emission in oriented bent ultra-thin Si and Ge crystals

V. V. Haurylavets, V. K. Ivanov, A. V. Korol, A. V. Solov'yov

Summary: Computational modeling of high-energy electron passage through crystalline media is conducted using relativistic molecular dynamics. The results show good agreement with experimental data, demonstrating the accuracy of the simulations. Minor discrepancies between theory and experiment are discussed.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT (2024)

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Article Instruments & Instrumentation

Eco-friendly Resistive Plate Chambers for detectors in future HEP applications

Luca Quaglia, R. Cardarelli, B. Liberti, E. Pastori, G. Proto, L. Pizzimento, A. Rocchi, G. Aielli, P. Camarri, A. Di Ciacco, L. Di Stante, R. Santonico, D. Boscherini, A. Bruni, L. Massa, A. Polini, M. Romano, L. Benussi, S. Bianco, D. Piccolo, G. Saviano, M. Abbrescia, L. Congedo, M. De Serio, G. Galati, G. Pugliese, S. Simone, D. Ramos, P. Salvini, A. Samalan, M. Tytgat, N. Zaganidis, J. Eysermans, A. Ferretti, M. Gagliardi, L. Terlizzi, E. Vercellin, P. Dupieux, B. Joly, S. P. Manen, R. Guida, B. Mandelli, G. Rigoletti, M. Barroso, M. C. Arena, A. Pastore, R. Aly, M. Verzeroli, S. Buontempo

Summary: Resistive Plate Chamber detectors are widely used in current High Energy Physics experiments. However, efforts are being made to find eco-friendly gas alternatives to Tetrafluoroethane. The RPC EcoGas@GIF++ collaboration aims to improve RPC technology, evaluate the performance of RPCs with eco-friendly gas mixtures, and conduct aging tests.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT (2024)

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