☆ 4.5 Article

Solution to Faddeev equations with two-body experimental amplitudes as input and application to JP=1/2+, S=0 baryon resonances

PHYSICAL REVIEW C (2009)

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PHYSICAL REVIEW C

Volume 79, Issue 6, Pages -

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AMER PHYSICAL SOC

DOI: 10.1103/PhysRevC.79.065207

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Physics, Nuclear

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Abstract

We solve the Faddeev equations for the two meson-one baryon system pi pi N and coupled channels using the experimental two-body t matrices for the pi N interaction as input and unitary chiral dynamics to describe the interaction between the rest of coupled channels. In addition to the N-*(1710) obtained before with the pi pi N channel, we obtain, for J(pi)=1/2(+) and total isospin of the three-body system I=1/2, a resonance peak whose mass is around 2080 MeV and width 54 MeV, while for I=3/2 we find a peak around 2126 with 42 MeV of width. These two resonances can be identified with the N-*(2100) and the Delta(1910), respectively. We obtain another peak in the isospin 1/2 configuration, around 1920 MeV that can be interpreted as a resonance in the Na-0(980) and Nf(0)(980) systems. .

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Nahn, V O'Dell, V Papadimitriou, K. Pedro, C. Pena, O. Prokofyev, F. Ravera, A. Reinsvold Hall, L. Ristori, B. Schneider, E. Sexton-Kennedy, N. Smith, A. Soha, W. J. Spalding, L. Spiegel, S. Stoynev, J. Strait, L. Taylor, S. Tkaczyk, N. Tran, L. Uplegger, E. W. Vaandering, H. A. Weber, D. Acosta, P. Avery, D. Bourilkov, L. Cadamuro, V Cherepanov, F. Errico, R. D. Field, D. Guerrero, B. M. Joshi, M. Kim, E. Koenig, J. Konigsberg, A. Korytov, K. H. Lo, K. Matchev, N. Menendez, G. Mitselmakher, A. Muthirakalayil Madhu, N. Rawal, D. Rosenzweig, S. Rosenzweig, K. Shi, J. Sturdy, J. Wang, E. Yigitbasi, X. Zuo, T. Adams, A. Askew, R. Habibullah, V Hagopian, K. F. Johnson, R. Khurana, T. Kolberg, G. Martinez, H. Prosper, C. Schiber, O. Viazlo, R. Yohay, J. Zhang, M. M. Baarmand, S. Butalla, T. Elkafrawy, M. Hohlmann, R. Kumar Verma, D. Noonan, M. Rahmani, F. Yumiceva, M. R. Adams, H. Becerril Gonzalez, R. Cavanaugh, X. Chen, S. Dittmer, O. Evdokimov, C. E. Gerber, D. A. Hangal, D. J. Hofman, A. H. Merrit, C. Mills, G. Oh, T. Roy, S. Rudrabhatla, M. B. Tonjes, N. Varelas, J. Viinikainen, X. Wang, Z. Wu, Z. Ye, M. Alhusseini, K. Dilsiz, R. P. Gandrajula, O. K. Koseyan, J-P Merlo, A. Mestvirishvili, J. Nachtman, H. Ogul, Y. Onel, A. Penzo, C. Snyder, E. Tiras, O. Amram, B. Blumenfeld, L. Corcodilos, J. Davis, M. Eminizer, A. Gritsan, S. Kyriacou, P. Maksimovic, J. Roskes, M. Swartz, T. A. Vami, A. Abreu, J. Anguiano, C. Baldenegro Barrera, P. Baringer, A. Bean, A. Bylinkin, Z. Flowers, T. Isidori, S. Khalil, J. King, G. Krintiras, A. Kropivnitskaya, M. Lazarovits, C. Lindsey, J. Marquez, N. Minafra, M. Murray, M. Nickel, C. Rogan, C. Royon, R. Salvatico, S. Sanders, E. Schmitz, C. Smith, J. D. Tapia Takaki, Q. Wang, Z. Warner, J. Williams, G. Wilson, S. Duric, A. Ivanov, K. Kaadze, D. Kim, Y. Maravin, T. Mitchell, A. Modak, K. Nam, F. Rebassoo, D. Wright, E. Adams, A. Baden, O. Baron, A. Belloni, S. C. Eno, N. J. Hadley, S. Jabeen, R. G. Kellogg, T. Koeth, A. C. Mignerey, S. Nabili, M. Seidel, A. Skuja, L. Wang, K. Wong, D. Abercrombie, G. Andreassi, R. Bi, S. Brandt, W. Busza, I. A. Cali, Y. Chen, M. D'Alfonso, J. Eysermans, C. Freer, G. Gomez Ceballos, M. Goncharov, P. Harris, M. Hu, M. Klute, D. Kovalskyi, J. Krupa, Y-J Lee, B. Maier, C. Mironov, C. Paus, D. Rankin, C. Roland, G. Roland, Z. Shi, G. S. F. Stephans, K. Tatar, J. Wang, Z. Wang, B. Wyslouch, R. M. Chatterjee, A. Evans, P. Hansen, J. Hiltbrand, Sh Jain, M. Krohn, Y. Kubota, J. Mans, M. Revering, R. Rusack, R. Saradhy, N. Schroeder, N. Strobbe, M. A. Wadud, K. Bloom, M. Bryson, S. Chauhan, D. R. Claes, C. Fangmeier, L. Finco, F. Golf, C. Joo, I Kravchenko, M. Musich, I Reed, J. E. Siado, G. R. Snow, W. Tabb, F. Yan, G. Agarwal, H. Bandyopadhyay, L. Hay, I. Iashvili, A. Kharchilava, C. McLean, D. Nguyen, J. Pekkanen, S. Rappoccio, A. Williams, G. Alverson, E. Barberis, Y. Haddad, A. Hortiangtham, J. Li, G. Madigan, B. Marzocchi, D. M. Morse, V Nguyen, T. Orimoto, A. Parker, L. Skinnari, A. Tishelman-Charny, T. Wamorkar, B. Wang, A. Wisecarver, D. Wood, S. Bhattacharya, J. Bueghly, Z. Chen, A. Gilbert, T. Gunter, K. A. Hahn, Y. Liu, N. Odell, M. H. Schmitt, M. Velasco, R. Band, R. Bucci, A. Das, N. Dev, R. Goldouzian, M. Hildreth, K. Hurtado Anampa, C. Jessop, K. Lannon, J. Lawrence, N. Loukas, D. Lutton, N. Marinelli, I Mcalister, T. McCauley, F. Meng, K. Mohrman, Y. Musienko, R. Ruchti, P. Siddireddy, A. Townsend, M. Wayne, A. Wightman, M. Wolf, M. Zarucki, L. Zygala, B. Bylsma, B. Cardwell, L. S. Durkin, B. Francis, C. Hill, M. Nunez Ornelas, K. Wei, B. L. Winer, B. R. Yates, F. M. Addesa, B. Bonham, P. Das, G. Dezoort, P. Elmer, A. Frankenthal, B. Greenberg, N. Haubrich, S. Higginbotham, A. Kalogeropoulos, G. Kopp, S. Kwan, D. Lange, M. T. Lucchini, D. Marlow, K. Mei, I Ojalvo, J. Olsen, C. Palmer, D. Stickland, C. Tully, S. Malik, S. Norberg, A. S. Bakshi, V. E. Barnes, R. Chawla, S. Das, L. Gutay, M. Jones, A. W. Jung, S. Karmarkar, M. Liu, G. Negro, N. Neumeister, G. Paspalaki, C. C. Peng, S. Piperov, A. Purohit, J. F. Schulte, M. Stojanovic, J. Thieman, F. Wang, R. Xiao, W. Xie, J. Dolen, N. Parashar, A. Baty, M. Decaro, S. Dildick, K. M. Ecklund, S. Freed, P. Gardner, F. J. M. Geurts, A. Kumar, W. Li, B. P. Padley, R. Redjimi, W. Shi, A. G. Stahl Leiton, S. Yang, L. Zhang, Y. Zhang, A. Bodek, P. de Barbaro, R. Demina, J. L. Dulemba, C. Fallon, T. Ferbel, M. Galanti, A. Garcia-Bellido, O. Hindrichs, A. Khukhunaishvili, E. Ranken, R. Taus, B. Chiarito, J. P. Chou, A. Gandrakota, Y. Gershtein, E. Halkiadakis, A. Hart, M. Heindl, O. Karacheban, I Laflotte, A. Lath, R. Montalvo, K. Nash, M. Osherson, S. Salur, S. Schnetzer, S. Somalwar, R. Stone, S. A. Thayil, S. Thomas, H. Wang, H. Acharya, A. G. Delannoy, S. Spanier, O. Bouhali, M. Dalchenko, A. Delgado, R. Eusebi, J. Gilmore, T. Huang, T. Kamon, H. Kim, S. Luo, S. Malhotra, R. Mueller, D. Overton, D. Rathjens, A. Safonov, N. Akchurin, J. Damgov, V Hegde, S. Kunori, K. Lamichhane, S. W. Lee, T. Mengke, S. Muthumuni, T. Peltola, I Volobouev, Z. Wang, A. Whitbeck, E. Appelt, S. Greene, A. Gurrola, W. Johns, A. Melo, H. Ni, K. Padeken, F. Romeo, P. Sheldon, S. Tuo, J. Velkovska, M. W. Arenton, B. Cox, G. Cummings, J. Hakala, R. Hirosky, M. Joyce, A. Ledovskoy, A. Li, C. Neu, B. Tannenwald, S. White, E. Wolfe, N. Poudyal, K. Black, T. Bose, J. Buchanan, C. Caillol, S. Dasu, I De Bruyn, P. Everaerts, F. Fienga, C. Galloni, H. He, M. Herndon, A. Herve, U. Hussain, A. Lanaro, A. Loeliger, R. Loveless, J. Madhusudanan Sreekala, A. Mallampalli, A. Mohammadi, D. Pinna, A. Savin, V Shang, V Sharma, W. H. Smith, D. Teague, S. Trembath-Reichert, W. Vetens

Summary: A search for resonances decaying into a W boson and a radion is conducted using data analyzed from proton-proton collisions with the CMS detector at 13 TeV. The results find no excess over the background estimation, and limits are set on parameters of an extended warped extradimensional model. This is the first search of its kind at the LHC.

PHYSICAL REVIEW LETTERS (2022)

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Article Chemistry, Physical

Composites to Produce a Material with Zero Absolute Thermopower S=0 or a Thermopower Switch between S=0 and S ≠ 0

Joachim Sonntag, Bertrand Lenoir

Summary: According to the theory of two-phase composites, a kink in the concentration dependence of the Seebeck coefficient can occur precisely at S=0 when two phases have different kinds of carriers and when phase grains are spherical without preferred orientations. This feature has been found in amorphous Cr1-xSix thin films and can be used to create reference standards and design a thermopower switch. The structure of an alloy during solidification not only depends on atom mobility and Gibbs' free energy, but also on maintaining continuity of entropy and energy flux densities and their gradients.

MATERIALS (2021)

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Article Physics, Multidisciplinary

Two-Loop QCD Corrections to Wb(b)over-bar Production at Hadron Colliders

Simon Badger, Heribertus Bayu Hartanto, Simone Zoia

Summary: An analytic computation of two-loop QCD corrections to u (d) over bar -> W(+)b (b) over bar for an on-shell W boson was presented using leading color and massless bottom quark approximations. Integration-by-parts reduction of the unpolarized squared matrix element was achieved through finite field reconstruction techniques, leading to the identification of an independent basis of special functions allowing for analytic subtraction of infrared and ultraviolet poles. This basis is applicable to all planar topologies for five-particle scattering with an off-shell leg.

PHYSICAL REVIEW LETTERS (2021)

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Review Multidisciplinary Sciences

An S-matrix approach to gravitational-wave physics

Pierre Vanhove

Summary: The detection of gravitational waves has provided new insights into the Universe, and recent advances in scattering amplitudes and the extraction of effective gravitational potential have contributed to this field. These techniques are not limited to four-dimensional Einstein gravity.

PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES (2022)

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Article Astronomy & Astrophysics

The Ξ(1620) and Ξ(1690) molecular states from S =-2 meson-baryon interaction up to next-to-leading order

A. Feijoo, V. Valcarce Cadenas, V. K. Magas

Summary: We have used extended Unitarized Chiral Perturbation Theory to study the meson-baryon interaction in the neutral S = -2 sector. Our approach incorporates not only the leading Weinberg-Tomozawa term, as in previous studies, but also the Born terms and next-to-leading order contribution. By employing the SU(3) symmetry of the chiral Lagrangian, we have taken most of the model parameters from the BCN model and fit them to experimental data in the neutral S = -1 sector. Our results demonstrate the ability of our approach to dynamically generate Xi(1620) and Xi(1690) states in reasonable agreement with the data, and provide a natural explanation for the puzzle with the decay branching ratios of Xi(1690). This highlights the reliability of chiral models with unitarization in coupled channels and the importance of considering Born and NLO contributions for precise calculations.

PHYSICS LETTERS B (2023)

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Article Astronomy & Astrophysics

Measurement of branching fraction of D-s+ -> D-s(+)pi(0) relative to D-s+ -> D-s(+)gamma

M. Ablikim, M. N. Achasov, P. Adlarson, M. Albrecht, R. Aliberti, A. Amoroso, M. R. An, Q. An, X. H. Bai, Y. Bai, O. Bakina, R. Baldini Ferroli, I. Balossino, Y. Ban, V. Batozskaya, D. Becker, K. Begzsuren, N. Berger, M. Bertani, D. Bettoni, F. Bianchi, J. Bloms, A. Bortone, I. Boyko, R. A. Briere, A. Brueggemann, H. Cai, X. Cai, A. Calcaterra, G. F. Cao, N. Cao, S. A. Cetin, J. F. Chang, W. L. Chang, G. Chelkov, C. Chen, Chao Chen, G. Chen, H. S. Chen, M. L. Chen, S. J. Chen, S. M. Chen, T. Chen, X. R. Chen, X. T. Chen, Y. B. Chen, Z. J. Chen, W. S. Cheng, S. K. Choi, X. Chu, G. Cibinetto, F. Cossio, J. J. Cui, H. L. Dai, J. P. Dai, A. Dbeyssi, R. E. de Boer, D. Dedovich, Z. Y. Deng, A. Denig, I. Denysenko, M. Destefanis, F. De Mori, Y. Ding, J. Dong, L. Y. Dong, M. Y. Dong, X. Dong, S. X. Du, P. Egorov, Y. L. Fan, J. Fang, S. S. Fang, W. X. Fang, Y. Fang, R. Farinelli, L. Fava, F. Feldbauer, G. Felici, C. Q. Feng, J. H. Feng, K. Fischer, M. Fritsch, C. Fritzsch, C. D. Fu, H. Gao, Y. N. Gao, Yang Gao, S. Garbolino, I. Garzia, P. T. Ge, Z. W. Ge, C. Geng, E. M. Gersabeck, A. Gilman, K. Goetzen, L. Gong, W. X. Gong, W. Gradl, M. Greco, L. M. Gu, M. H. Gu, Y. T. Gu, C. Y. Guan, A. Q. Guo, L. B. Guo, R. P. Guo, Y. P. Guo, A. Guskov, T. T. Han, W. Y. Han, X. Q. Hao, F. A. Harris, K. K. He, K. L. He, F. H. Heinsius, C. H. Heinz, Y. K. Heng, C. Herold, G. Y. Hou, Y. R. Hou, Z. L. Hou, H. M. Hu, J. F. Hu, T. Hu, Y. Hu, G. S. Huang, K. X. Huang, L. Q. Huang, X. T. Huang, Y. P. Huang, Z. Huang, T. Hussain, N. Husken, W. Imoehl, M. Irshad, J. Jackson, S. Jaeger, S. Janchiv, E. Jang, J. H. Jeong, Q. Ji, Q. P. Ji, X. B. Ji, X. L. Ji, Y. Y. Ji, Z. K. Jia, H. B. Jiang, S. S. Jiang, X. S. Jiang, Y. Jiang, J. B. Jiao, Z. Jiao, S. Jin, Y. Jin, M. Q. Jing, T. Johansson, N. Kalantar-Nayestanaki, X. S. Kang, R. Kappert, M. Kavatsyuk, B. C. Ke, I. K. Keshk, A. Khoukaz, R. Kiuchi, R. Kliemt, L. Koch, O. B. Kolcu, B. Kopf, M. Kuemmel, M. Kuessner, A. Kupsc, W. Kuhn, J. J. Lane, J. S. Lange, P. Larin, A. Lavania, L. Lavezzi, Z. H. Lei, H. Leithoff, M. Lellmann, T. Lenz, C. Li, C. Li, C. H. Li, Cheng Li, D. M. Li, F. Li, G. Li, H. Li, H. Li, H. B. Li, H. J. Li, H. N. Li, J. Q. Li, J. S. Li, J. W. Li, Ke Li, L. J. Li, L. K. Li, Lei Li, M. H. Li, P. R. Li, S. X. Li, S. Y. Li, T. Li, W. D. Li, W. G. Li, X. H. Li, X. L. Li, Xiaoyu Li, Y. G. Li, Z. X. Li, H. Liang, H. Liang, H. Liang, Y. F. Liang, Y. T. Liang, G. R. Liao, L. Z. Liao, J. Libby, A. Limphirat, C. X. Lin, D. X. Lin, T. Lin, B. J. Liu, C. X. Liu, D. Liu, F. H. Liu, Fang Liu, Feng Liu, G. M. Liu, H. Liu, H. B. Liu, H. M. Liu, Huanhuan Liu, Huihui Liu, J. B. Liu, J. L. Liu, J. Y. Liu, K. Liu, K. Y. Liu, Ke Liu, L. Liu, Lu Liu, M. H. Liu, P. L. Liu, Q. Liu, S. B. Liu, T. Liu, W. K. Liu, W. M. Liu, X. Liu, Y. Liu, Y. B. Liu, Z. A. Liu, Z. Q. Liu, X. C. Lou, F. X. Lu, H. J. Lu, J. G. Lu, X. L. Lu, Y. Lu, Y. P. Lu, Z. H. Lu, C. L. Luo, M. X. Luo, T. Luo, X. L. Luo, X. R. Lyu, Y. F. Lyu, F. C. Ma, H. L. Ma, L. L. Ma, M. M. Ma, Q. M. Ma, R. Q. Ma, R. T. Ma, X. Y. Ma, Y. Ma, F. E. Maas, M. Maggiora, S. Maldaner, S. Malde, Q. A. Malik, A. Mangoni, Y. J. Mao, Z. P. Mao, S. Marcello, Z. X. Meng, J. Messchendorp, G. Mezzadri, H. Miao, T. J. Min, R. E. Mitchell, X. H. Mo, N. Yu. Muchnoi, Y. Nefedov, F. Nerling, I. B. Nikolaev, Z. Ning, S. Nisar, Y. Niu, S. L. Olsen, Q. Ouyang, S. Pacetti, X. Pan, Y. Pan, A. Pathak, M. Pelizaeus, H. P. Peng, K. Peters, J. L. Ping, R. G. Ping, S. Plura, S. Pogodin, V. Prasad, F. Z. Qi, H. Qi, H. R. Qi, M. Qi, T. Y. Qi, S. Qian, W. B. Qian, Z. Qian, C. F. Qiao, J. J. Qin, L. Q. Qin, X. P. Qin, X. S. Qin, Z. H. Qin, J. F. Qiu, S. Q. Qu, K. H. Rashid, C. F. Redmer, K. J. Ren, A. Rivetti, V. Rodin, M. Rolo, G. Rong, Ch. Rosner, S. N. Ruan, H. S. Sang, A. Sarantsev, Y. Schelhaas, C. Schnier, K. Schoenning, M. Scodeggio, K. Y. Shan, W. Shan, X. Y. Shan, J. F. Shangguan, L. G. Shao, M. Shao, C. P. Shen, H. F. Shen, X. Y. Shen, B. A. Shi, H. C. Shi, J. Y. Shi, Q. Q. Shi, R. S. Shi, X. Shi, X. D. Shi, J. J. Song, W. M. Song, Y. X. Song, S. Sosio, S. Spataro, F. Stieler, K. X. Su, P. P. Su, Y. J. Su, G. X. Sun, H. Sun, H. K. Sun, J. F. Sun, L. Sun, S. S. Sun, T. Sun, W. Y. Sun, X. Sun, Y. J. Sun, Y. Z. Sun, Z. T. Sun, Y. H. Tan, Y. X. Tan, C. J. Tang, G. Y. Tang, J. Tang, L. Y. Tao, Q. T. Tao, M. Tat, J. X. Teng, V. Thoren, W. H. Tian, Y. Tian, I. Uman, B. Wang, B. L. Wang, C. W. Wang, D. Y. Wang, F. Wang, H. J. Wang, H. P. Wang, K. Wang, L. L. Wang, M. Wang, M. Z. Wang, Meng Wang, S. Wang, S. Wang, T. Wang, T. J. Wang, W. Wang, W. H. Wang, W. P. Wang, X. Wang, X. F. Wang, X. L. Wang, Y. Wang, Y. D. Wang, Y. F. Wang, Y. H. Wang, Y. Q. Wang, Yaqian Wang, Z. Wang, Z. Y. Wang, Ziyi Wang, D. H. Wei, F. Weidner, S. P. Wen, D. J. White, U. Wiedner, G. Wilkinson, M. Wolke, L. Wollenberg, J. F. Wu, L. H. Wu, L. J. Wu, X. Wu, X. H. Wu, Y. Wu, Y. J. Wu, Z. Wu, L. Xia, T. Xiang, D. Xiao, G. Y. Xiao, H. Xiao, S. Y. Xiao, Y. L. Xiao, Z. J. Xiao, C. Xie, X. H. Xie, Y. Xie, Y. G. Xie, Y. H. Xie, Z. P. Xie, T. Y. Xing, C. F. Xu, C. J. Xu, G. F. Xu, H. Y. Xu, Q. J. Xu, X. P. Xu, Y. C. Xu, Z. P. Xu, F. Yan, L. Yan, W. B. Yan, W. C. Yan, H. J. Yang, H. L. Yang, H. X. Yang, L. Yang, S. L. Yang, Tao Yang, Y. F. Yang, Y. X. Yang, Yifan Yang, M. Ye, M. H. Ye, J. H. Yin, Z. Y. You, B. X. Yu, C. X. Yu, G. Yu, T. Yu, X. D. Yu, C. Z. Yuan, L. Yuan, S. C. Yuan, X. Q. Yuan, Y. Yuan, Z. Y. Yuan, C. X. Yue, A. A. Zafar, F. R. Zeng, X. Zeng, Y. Zeng, Y. H. Zhan, A. Q. Zhang, B. L. Zhang, B. X. Zhang, D. H. Zhang, G. Y. Zhang, H. Zhang, H. H. Zhang, H. Y. Zhang, J. L. Zhang, J. Q. Zhang, J. W. Zhang, J. X. Zhang, J. Y. Zhang, J. Z. Zhang, Jianyu Zhang, Jiawei Zhang, L. M. Zhang, L. Q. Zhang, Lei Zhang, P. Zhang, Q. Y. Zhang, Shuihan Zhang, Shulei Zhang, X. D. Zhang, X. M. Zhang, X. Y. Zhang, X. Y. Zhang, Y. Zhang, Y. T. Zhang, Y. H. Zhang, Yan Zhang, Yao Zhang, Z. H. Zhang, Z. Y. Zhang, Z. Y. Zhang, G. Zhao, J. Zhao, J. Y. Zhao, J. Z. Zhao, Lei Zhao, Ling Zhao, M. G. Zhao, Q. Zhao, S. J. Zhao, Y. B. Zhao, Y. X. Zhao, Z. G. Zhao, A. Zhemchugov, B. Zheng, J. P. Zheng, Y. H. Zheng, B. Zhong, C. Zhong, X. Zhong, H. Zhou, L. P. Zhou, X. Zhou, X. K. Zhou, X. R. Zhou, X. Y. Zhou, Y. Z. Zhou, J. Zhu, K. Zhu, K. J. Zhu, L. X. Zhu, S. H. Zhu, S. Q. Zhu, T. J. Zhu, W. J. Zhu, Y. C. Zhu, Z. A. Zhu, B. S. Zou, J. H. Zou

Summary: Based on the data from e(+)e(-) collisions at center-of-mass energies between 4.128 and 4.226 GeV with the BESIII detector, the branching fraction of D-s*(+)-> D-s(+)pi(0) relative to that of D-s*(+) -> D-s(+)gamma is measured to be (6.16 +/- 10.43 +/- 10.18)%. The statistical and systematic uncertainties are taken into account. Using the world average value of the branching fraction of D-s*(+) -> D-s(+) e(+)e(-), the branching fractions of D-s(*+) -> D-s(+)gamma and D-s(*+) -> D-s(+)pi(0) are determined to be (93.57 +/- 10.38 +/- 10.22)% and (5.76 +/- 10.38 +/- 10.16)%, respectively.

PHYSICAL REVIEW D (2023)

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Article Astronomy & Astrophysics

The (B)over-bar0→ D+ (D)over-bar0K- reaction to detect the I=0, JP=1+partner of the X0(2866)

L. R. Dai, R. Molina, E. Oset

Summary: In this study, we chose the (B) over bar (0)-> D*+ (D) over bar*K-0 reaction to observe the state of X-0(2866), which is a partner state of the D*+ (K) over bar* molecular picture. The reaction allows us to observe the R(1) state, which appears as a strong peak in the D*+ K- spectrum.

PHYSICS LETTERS B (2022)

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Article Mathematics

The variational approach to s-fractional heat flows and the limit cases s-+0+and s-+1-

V. Crismale, L. De Luca, A. Kubin, A. Ninno, M. Ponsiglione

Summary: This paper studies the limit cases of s-fractional heat flows in a cylindrical domain with homogeneous Dirichlet boundary conditions, as s-+ 0+ and s-+ 1-. The fractional heat flows are described as minimizing movements of the corresponding Gagliardo seminorms with respect to the L2 metric. The results show that the s-fractional heat flows converge to the standard heat flow as s-+ 1- and to a degenerate ODE type flow as s-+ 0+. Additionally, the next order term in the asymptotic expansion of the s-fractional Gagliardo seminorm reveals that suitably forced s-fractional heat flows converge to a parabolic flow of an energy functional that can be seen as a sort of renormalized 0-Gagliardo seminorm, involving the first variation of such an energy.(c) 2023 Elsevier Inc. All rights reserved.

JOURNAL OF FUNCTIONAL ANALYSIS (2023)

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Article Physics, Multidisciplinary

Going beyond the Cumulant Approximation: Power Series Correction to the Single-Particle Green?s Function in the Holstein System

Bipul Pandey, Peter B. Littlewood

Summary: In the context of a single-electron two orbital Holstein system coupled to dispersionless bosons, a general method to correct the single-particle Green's function using a power series correction (PSC) scheme is developed. The derivations and assumptions behind various flavors of cumulant approximation through the PSC scheme are outlined. Comparisons between the PSC spectral function, cumulant, and exact diagonalized spectral functions reveal three regimes, two of which can be explained by the cumulant approximation and one where it fails. It is found that the exact and PSC spectral functions match within spectral broadening across all three regimes.

PHYSICAL REVIEW LETTERS (2022)

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Article Physics, Nuclear

N* states with hidden charm and a three-body nature

Brenda B. Malabarba, K. P. Khemchandani, A. Martinez Torres

Summary: In this work, the formation of N*'s in the ND (D) over bar* - N (D) over barD* system is studied. It is found that states with isospin I = 1/2 and mass in the energy region 4400 - 4600 MeV can arise with spin-parity J(P) = 1/2(+) and 3/2(+), indicating the existence of N* resonances with hidden charm and a three-body nature. The possibility of the existence of Delta(c) states, Delta's with hidden charm, is also discussed.

EUROPEAN PHYSICAL JOURNAL A (2022)

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Article Astronomy & Astrophysics

D1(2420) and its interactions with a kaon: Open charm states with strangeness

Brenda B. Malabarba, K. P. Khemchandani, A. Martinez Torres, E. Oset

Summary: In this study, we attempt to describe the X1(2900) as a three-meson molecular state of the KpD system in the invariant mass spectrum of D-K+ observed by the LHCb collaboration. The attractive interactions in all subsystems generate the D1(2420) and the K1(1270) resonating as Kp. We find that the system can form a three-body state but with a higher mass than X1(2900). We also investigate the KpD system, discovering an isoscalar state related to D*s1(2860) and an exotic isovector state with a mass similar to X0(2900) and X1(2900) but a very small width, which requires more than two quarks to describe its properties. Our findings hope to encourage experimental investigations of the isovector KpD state. Finally, in the search for a description of X1(2900), we study the K over line K*D* system and do not find a state associated with it.

PHYSICAL REVIEW D (2023)

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Article Physics, Nuclear

Theoretical study of the γd → π0ηd reaction

A. Martinez Torres, K. P. Khemchandani, E. Oset

Summary: We have conducted a theoretical study on the gamma d -> pi(0)eta d reaction using a realistic model for the gamma N -> pi(0)eta N reaction. We found the rescattering of the pions and the eta on a different nucleon to be an important mechanism in sharing the momentum transfer of the reaction between two nucleons. Other contributions involving the gamma N -> pi(+/-)pi N-0' process have also been considered. The dynamics of our model provide a natural explanation for the shift of the eta-d and pi(0)-d mass distributions compared to a phase space calculation.

PHYSICAL REVIEW C (2023)

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Article Physics, Particles & Fields

Exotic states with triple charm

M. Bayar, A. Martinez Torres, K. P. Khemchandani, R. Molina, E. Oset

Summary: This study investigates the possibility of the formation of exotic hadrons in the D* D* D* system. It is found that two D*'s can generate a bound state with JP = 1+, isospin 0. By solving the Faddeev equations within the fixed center approximation, states with J(P) = 0(-), 1(-), and 2(-) are discovered, which have charm 3, isospin 1/2, and masses around 6000 MeV, indicating their multiquark inner structure.

EUROPEAN PHYSICAL JOURNAL C (2023)

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Article Physics, Multidisciplinary

Exotic Properties of N*(1895) and Its Impact on Photoproduction of Light Hyperons

K. P. Khemchandani, A. Martinez Torres, Sang-Ho Kim, Seung-il Nam, A. Hosaka

Summary: This work outlines the findings of a recent study on the properties of N* (1895) and its impact on the cross-sections of the photoproduction of Lambda(1405). The possibility of an isovector state with a mass similar to Lambda(1405), referred to as Sigma(1400), is also discussed. The study sheds light on alternative processes in analyzing experimental data and motivates further investigations on Sigma(1400).

ACTA PHYSICA POLONICA A (2022)

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Correction Astronomy & Astrophysics

Masses and widths of the exotic molecular B(S)()B(S)() states (vol 105, 074017, 2022)

L. R. Dai, E. Oset, A. Feijoo, R. Molina, L. Roca, A. Martinez Torres, K. P. Khemchandani

PHYSICAL REVIEW D (2022)

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Article Astronomy & Astrophysics

Masses and widths of the exotic molecular B(s)()B(s)() states

L. R. Dai, E. Oset, A. Feijoo, R. Molina, L. Roca, A. Martinez Torres, K. P. Khemchandani

Summary: This study investigates the interaction between doubly bottom systems using vector meson exchange and Lagrangians derived from an extension of the local hidden gauge approach. The full s-wave scattering matrix is calculated using the Bethe-Salpeter equation and unitarity in coupled channels. Poles are found below channel thresholds for several attractive interacting channels, and the widths are evaluated by identifying the dominant source of imaginary part. The results show binding energies of around 10-20 MeV and varying widths for different systems.

PHYSICAL REVIEW D (2022)

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Article Astronomy & Astrophysics

Decay processes of a pseudoscalar D(2900)

Brenda B. Malabarba, K. P. Khemchandani, A. Martinez Torres

Summary: The study investigates the decay properties of a D(2900) state and identifies D-s0* (2317)(K) over bar as the most favorable decay channel. The findings aim to aid future experimental investigations of charm mesons around 3000 MeV.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

Photoproduction of Λ* and Σ* resonances with JP=1/2- off the proton

Sang-Ho Kim, K. P. Khemchandani, A. Martinez Torres, Seung-il Nam, Atsushi Hosaka

Summary: The study investigates the photoproduction of the Lambda(1405) and Sigma(1400) hyperon resonances, predicting observables for their production and providing polarization observables for both hyperon productions, offering new information for future experimental investigations.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

Partial decay widths of φ(2170) to kaonic resonances

Brenda B. Malabarba, Xiu-Lei Ren, K. P. Khemchandani, A. Martinez Torres

Summary: This study investigates the strong decays of phi(2170) to final states involving kaonic resonances, based on experimental data extracted by the BESIII Collaboration. The formalism developed interprets phi(2170) and K(1460) as states arising from three-hadron dynamics and explores different descriptions for K-1(1270) and K-1(1400). The results support the three-body nature of phi(2170) and provide insights into the properties of K(1460), K-1(1270), and K-1(1400) for future studies with higher statistics data.

PHYSICAL REVIEW D (2021)

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