$Lambda(1405)$在$d(K^-,n)piSigma$反应中的极点位置
摘要：$K^-$引起的氘反应中，我们在$K^-p\rightarrow \pi^+\Sigma^-$，$K^-p\rightarrow \pi^0\Sigma^0$和$K^-n\rightarrow \pi^-\Sigma^0$的不变质量谱中测量到了一组数据。在$\bar{K}N$和$pi\Sigma$耦合通道的框架下，我们推导出了同位旋0通道中的$S$波$\bar{K}N\rightarrow \pi\Sigma$和$\bar{K}N\rightarrow \bar{K}N$散射振幅。我们发现，相对于粒子数据组确定的值，对应于$Lambda(1405)$的共振极点位于1417.7$^{+6.0}_{-7.4}$(拟合误差)$^{+1.1}_{-1.0}$(系统误差) + $[-26.1^{+6.0}_{-7.9}$(拟合误差)$^{+1.7}_{-2.0}$(系统误差)]$i$ MeV/$c^2$，离$\bar{K}N$质量阈值更近。
作者：J-PARC E31 Collaboration: S. Aikawa (1), S. Ajimura (2), T. Akaishi (3), H. Asano (4), G. Beer (5), C. Berucci (6), M. Bragadireanu (7), P. Buehler (6), L. Busso (8 and 9), M. Cargnelli (6), S. Choi (10), C. Curceanu (11), S. Enomoto (12), H. Fujioka (1), Y. Fujiwara (13), T. Fukuda (14 and 15), C. Guaraldo (11), T. Hashimoto (16), R. S. Hayano (13), T. Hiraiwa (17), M. Iio (18), M. Iliescu (11), K. Inoue (2), Y. Ishiguro (19), S. Ishimoto (20), T. Ishikawa (13), K. Itahashi (4), M. Iwai (21), M. Iwasaki (4 and 1), K. Kanno (13), K. Kato (19), Y. Kato (4), S. Kawasaki (2), P. Kienle (22), Y. Komatsu (20), H. Kou (1), Y. Ma (4), J. Marton (6), Y. Matsuda (23), Y. Mizoi (14), O. Morra (8), R. Murayama (4), T. Nagae (14), H. Noumi (2 and 20), H. Ohnishi (24), S. Okada (4), Z. Omar (2 and 25), H. Outa (4), K. Piscicchia (26 and 27), Y. Sada (24), A. Sakaguchi (3), F. Sakuma (4), M. Sato (12), A. Scordo (11), M. Sekimoto (20), H. Shi (11), K. Shirotori (2), D. Sirghi (11 and 7), F. Sirghi (11 and 7), K. Suzuki (6), S. Suzuki (20), T. Suzuki (13), K. Tanida (16), H. Tatsuno (28), A. O. Tokiyasu (24), M. Tokuda (1), D. Tomono (2), A. Toyoda (20), K. Tsukada (4), O. Vazquez-Doce (11 and 29), E. Widmann (6), T. Yamaga (4), T. Yamazaki (4, 13), H. Yim (30), Q. Zhang (4), J. Zmeskal (6) ((1) Department of Physics, Tokyo Institute of Technology, (2) Research Center for Nuclear Physics (RCNP), Osaka University, (3) Department of Physics, Osaka University, (4) RIKEN Cluster for Pioneering Research (CPR), RIKEN, Wako, (5) Department of Physics and Astronomy, University of Victoria, (6) Stefan-Meyer-Institut f"ur subatomare Physik, (7) National Institute of Physics and Nuclear Engineering - IFINHH, (8) INFN Sezione di Torino, (9) Dipartimento di Fisica Generale, Universita'di Torino, (10) Department of Physics, Seoul National University, Seoul, (11) Laboratori Nazionali di Frascati dell'INFN, (12) Accelerator Laboratory, High Energy Accelerator Research Organization (KEK), (13) Department of Physics, The University of Tokyo, (14) Laboratory of Physics, Osaka Electro-Communication University, (15) RIKEN Nishina Center for Accelerator-Based Science, RIKEN, (16) ASRC, Japan Atomic Energy Agency (JAEA), (17) RIKEN SPring-8 Center, RIKEN, (18) Cryogenics Science Center, High Energy Accelerator Research Organization (KEK), (19) Department of Physics, Kyoto University, (20) Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), (21) Mechanical Engineering Center, High Energy Accelerator Research Organization (KEK), (22) Technische Universit"at M"unchen, (23) Graduate School of Arts and Sciences, The Univeristy of Tokyo, (24) Research Center for Electron Photon Science (ELPH), Tohoku University, (25) Department of Physics, Al-Farabi Kazakh National University, (26) Museo Storico della Fisica e Centro Studi e Ricerche "Enrico Fermi'', (27) INFN, Laboratori Nazionali di Frascati, (28) Department of Chemical Physics, Lund University, (29) Excellence Cluster University, Technische Universit"at M"unchen, (30) Korea Unstitute of Radiological and Medical Sciences (KIRAMS))
论文ID：2209.08254
分类：Nuclear Experiment
分类简称：nucl-ex
提交时间：2022-12-21