☆ 4.5 Article

Singularity structure of the π N scattering amplitude in a meson-exchange model up to energies W ≤ 2.0 GeV

PHYSICAL REVIEW C (2010)

Journal

PHYSICAL REVIEW C

Volume 82, Issue 5, Pages -

Publisher

AMER PHYSICAL SOC

DOI: 10.1103/PhysRevC.82.055203

Keywords

-

Categories

Physics, Nuclear

Funding

National Science Council
National Center for Theoretical Sciences of ROC
NSC/ROC [NSC98-2112-M002-006]
Deutsche Forschungsgemeinschaft [SFB 443]
Russian-German Heisenberg-Landau program
[NSC/DFG 446 TAI113/10/0-3]

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Abstract

Within the previously developed Dubna-Mainz-Taipei meson-exchange model, the singularity structure of the pi N scattering amplitudes has been investigated. For all partial waves up to F waves and c.m. energies up to W similar to 2 GeV, the T-matrix poles have been calculated by three different techniques: analytic continuation into the complex energy plane and speed-plot and regularization method. For all four-star resonances except the S-11(1535), we find very good agreement between the analytic continuation and the regularization method. We also find resonance poles for resonances that are not so well established, but in these cases the pole positions and residues obtained by analytic continuation can substantially differ from the results predicted by the speed-plot and regularization methods.

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Article Astronomy & Astrophysics

Measurement of the e(+) e(-) -> omega pi(0)pi(0) cross section at center-of-mass energies from 2.0 to 3.08 GeV

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, 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, 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, M. Himmelreich, 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, 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, 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, P. Kiese, 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, Z. Y. 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. M. Liu, Huanhuan Liu, Huihui Liu, J. B. Liu, J. L. Liu, J. Y. Liu, K. Liu, K. Y. Liu, Ke Liu, L. 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. G. Messchendorp, G. Mezzadri, H. Miao, T. J. Min, R. E. Mitchell, X. H. Mo, N. Yu Muchnoi, Y. Nefedov, I. B. Nikolaev, Z. Ning, S. Nisar, Y. Niu, S. L. Olsen, Q. Ouyang, S. Pacetti, X. Pan, Y. Pan, A. Pathak, A. Pathak, M. Pelizaeus, H. P. Peng, K. Peters, J. Pettersson, 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, 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, T. Wang, T. J. Wang, W. Wang, W. H. Wang, W. P. Wang, X. Wang, X. F. Wang, X. L. Wang, Y. D. Wang, Y. F. Wang, Y. H. Wang, Y. Q. Wang, Yi Wang, Ying 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, 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, S. Y. 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. 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, 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 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. 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, 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: The cross section of the process e(+)e(-) -> omega pi(0)pi(0) was measured at various center-of-mass energies, revealing a resonant structure around 2.20 GeV. A coherent fit was used to determine the mass and width of the structure.

PHYSICAL REVIEW D (2022)

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Article Astronomy & Astrophysics

Pole position of Λ (1405) measured in d(K-, n)πΣ reactions

S. Aikawa, S. Ajimura, T. Akaishi, H. Asano, G. Beer, C. Berucci, M. Bragadireanu, P. Buehler, L. Busso, M. Cargnelli, S. Choi, C. Curceanu, S. Enomoto, H. Fujioka, Y. Fujiwara, T. Fukuda, C. Guaraldo, T. Hashimoto, R. S. Hayano, T. Hiraiwa, M. Iio, M. Iliescu, K. Inoue, Y. Ishiguro, S. Ishimoto, T. Ishikawa, K. Itahashi, M. Iwai, M. Iwasaki, K. Kanno, K. Kato, Y. Kato, S. Kawasaki, P. Kienle, Y. Komatsu, H. Kou, Y. Ma, J. Marton, Y. Matsuda, Y. Mizoi, O. Morra, R. Murayama, T. Nagae, H. Noumi, H. Ohnishi, S. Okada, Z. Omar, H. Outa, K. Piscicchia, Y. Sada, A. Sakaguchi, F. Sakuma, M. Sato, A. Scordo, M. Sekimoto, H. Shi, K. Shirotori, D. Sirghi, F. Sirghi, K. Suzuki, S. Suzuki, T. Suzuki, K. Tanida, H. Tatsuno, A. O. Tokiyasu, M. Tokuda, D. Tomono, A. Toyoda, K. Tsukada, O. Vazquez-Doce, E. Widmann, T. Yamaga, T. Yamazaki, H. Yim, Q. Zhang, J. Zmeskal

Summary: In this study, we measured the invariant mass spectra of pi(+/-)Sigma(-/+), pi(0)Sigma(0), and pi(-)Sigma(0) below and above the (K) over bar N mass threshold in K-induced reactions on deuteron. The experimentally observed pi Sigma mass spectral shape is well reproduced by a two-step mechanism involving the knock-out of a neutron from a deuteron by an incident K- at a forward angle, followed by the backward recoil of the (K) over bar and its reaction with the residual nucleon to produce pi and Sigma. By analyzing the data, we determined the S-wave (K) over bar N -> pi Sigma and (K) over bar N -> (K) over bar N scattering amplitudes in the isospin 0 channel, from which we found that the resonance pole corresponding to Lambda(1405) is located closer to the (K) over bar N mass threshold compared to the value determined by the Particle Data Group.

PHYSICS LETTERS B (2023)

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Article Chemistry, Physical

First principle study of Curie temperature, spin polarization, ferromagnetism and transport behavior of Sr2CrXO6 (X = Ta, W, Re, Os) for spintronic

Taharh Zelai

Summary: This article studies the magnetic properties of Sr2CrXO6 double perovskites and the role of 5d-electrons in Ta, W, Re, and Os. It reveals the half-metallic ferromagnetic nature and the mechanisms that induce ferromagnetism. Furthermore, the thermoelectric potential of the double perovskites is explored.

JOURNAL OF ALLOYS AND COMPOUNDS (2023)

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Article Multidisciplinary Sciences

Meson-Exchange Currents in Quasielastic Electron Scattering in a Generalized Superscaling Approach

Paloma Rodriguez Casale, Jose Enrique Amaro, Maria B. Barbaro

Summary: This study introduces a method to incorporate meson-exchange currents (MEC) within the relativistic mean field model, and applies it to the analysis of quasielastic cross-sectional data on 12C. The results show a departure from scaling behavior, but the data can be parametrized into a discernible band. However, the level of uncertainty is considerable and does not allow for precise extraction of nuclear responses.

SYMMETRY-BASEL (2023)

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Article Physics, Nuclear

Triangle singularity mechanism for the pp → π+d fusion reaction

Natsumi Ikeno, Raquel Molina, Eulogio Oset

Summary: The model developed for the pp -> pi(+)d reaction involves multiple transitions and fusions, resulting in a large cross section for the reaction. The process is dominated by the pp system and transfers angular momentum effectively, making it suitable for describing another reaction.

PHYSICAL REVIEW C (2021)

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Article Chemistry, Physical

Unveiling the role of pyrylium frameworks on π-stacking interactions: a combined ab initio and experimental study

Reyes Nunez-Franco, Gonzalo Jimenez-Oses, Jesus Jimenez-Barbero, Francisca Cabrera-Escribano, Antonio Franconetti

Summary: A multidisciplinary study is conducted to investigate the pi-pi interactions established by pyrylium frameworks as pi-hole donors. The combination of CSD analysis, computational modelling, and experimental NMR spectroscopy data provides essential information on the key parameters characterizing these interactions, paving the way for further applications of this versatile heterocycle.

PHYSICAL CHEMISTRY CHEMICAL PHYSICS (2022)

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Article Astronomy & Astrophysics

High-Energy Lepton Scattering and Nuclear Structure Issues

Thomas W. Donnelly

Summary: This study focuses on high-energy lepton scattering and presents developments in kinematic variables for semi-inclusive electron scattering. The chosen variables are designed to match the expected dynamics of the nuclear landscape. Nuclear structure and electroweak current issues at high energies are discussed, as well as the differences between electron scattering and charge-changing neutrino reactions.

UNIVERSE (2023)

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Article Physics, Nuclear

First results on nucleon resonance electroexcitation amplitudes from ep -> e ' plus pi-pi ' p ' cross sections at W=1.4-1.7 GeV and Q2=2.0-5.0 GeV2

V. I. Mokeev, P. Achenbach, V. D. Burkert, D. S. Carman, R. W. Gothe, A. N. Hiller Blin, E. L. Isupov, K. Joo, K. Neupane, A. Trivedi

Summary: The electroexcitation amplitudes and γvpN* electrocouplings of the N(1440)1/2+, N(1520)3/2-, and Δ(1600)3/2+ resonances were obtained for the first time through measurements of the ep → e'n+n-p' differential cross sections. The accurate fitting of these cross sections for each bin of (W, Q2) allowed for the separation of resonant and nonresonant contributions, providing evidence for the reliable extraction of the electrocouplings. The study also extended the information on the electrocouplings of the N(1440)1/2+ and N(1520)3/2- states over a broader range of Q2, and determined the electrocouplings of the Δ(1600)3/2+ resonance for the first time.

PHYSICAL REVIEW C (2023)

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