1. Hypernuclear spectroscopy of products from Li-6 projectiles on a carbon target at 2 A GeV
- Author
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Patrick Achenbach, L. Nungesser, T. Hiraiwa, G.J. Tambave, Hiroyuki Tamura, C.J. Yoon, S. Voltz, J. Pochodzalla, T.R. Saito, W. Ott, G. Ickert, Yutaka Mizoi, S. Minami, Tomofumi Nagae, C. Rappold, M. Sekimoto, B. Özel-Tashenov, J. Hoffmann, A. Okamura, Tomokazu Fukuda, S. Bianchin, H. Simon, S. Erturk, M. Sako, T. Takahashi, Atsushi Sakaguchi, B. Göküzüm, S. Ajimura, C. Caesar, S. J. Kim, C. Ayerbe Gayoso, A. Le Fèvre, M. Moritsu, E. Guliev, N. Yokota, M. Kavatsyuk, Z.S. Ketenci, K. Koch, N. Kurz, C.J. Schmidt, Minu Kim, K. Yoshida, V. Bozkurt, O. Bertini, D. Nakajima, T. Aumann, Y. Ma, E. H. Kim, D. Khaneft, H. C. Bhang, F. E. Maas, H. Sugimura, W. Trautmann, KVI - Center for Advanced Radiation Technology, Mizoi, Yutaka -- 0000-0002-4749-0815, Ayerbe Gayoso, Carlos -- 0000-0001-8640-5380, Rappold, Christophe -- 0000-0002-5390-5052, Achenbach, Patrick -- 0000-0002-6754-653X, Caesar, Christoph -- 0000-0001-5844-7073, [Rappold, C.] Univ Giessen, D-35392 Giessen, Germany -- [Rappold, C. -- Kim, E. -- Nakajima, D. -- Saito, T. R. -- Bertini, O. -- Bianchin, S. -- Bozkurt, V. -- Ma, Y. -- Maas, F. -- Minami, S. -- Oezel-Tashenov, B. -- Yoshida, K. -- Aumann, T. -- Gokuzum, B. -- Hoffmann, J. -- Ickert, G. -- Khaneft, D. -- Koch, K. -- Kurz, N. -- Le Fevre, A. -- Ott, W. -- Schmidt, C. J. -- Simon, H. -- Trautmann, W. -- Voltz, S.] GSI Helmholtz Ctr Heavy Ion Res, D-64291 Darmstadt, Germany -- [Kim, E. -- Bhang, H. C. -- Kim, M. -- Kim, S. -- Yoon, C. J.] Seoul Natl Univ, Seoul 151747, South Korea -- [Nakajima, D.] Univ Tokyo, Bunkyo Ku, Tokyo 1130033, Japan -- [Saito, T. R. -- Bertini, O. -- Ma, Y. -- Maas, F. -- Achenbach, P. -- Gayoso, C. Ayerbe -- Khaneft, D. -- Nungesser, L. -- Pochodzalla, J.] Johannes Gutenberg Univ Mainz, D-55099 Mainz, Germany -- [Saito, T. R. -- Maas, F. -- Yoshida, K.] HIM, D-55099 Mainz, Germany -- [Bozkurt, V. -- Erturk, S. -- Gokuzum, B. -- Ketenci, Z. S.] Nigde Univ, TR-51100 Nigde, Turkey -- [Kavatsyuk, M. -- Guliev, E. -- Tambave, G. J.] Univ Groningen, KVI, NL-9747 AA Groningen, Netherlands -- [Yoshida, K. -- Sakaguchi, A.] Osaka Univ, Toyonaka, Osaka 5600043, Japan -- [Ajimura, S.] RCNP, Osaka 5670047, Japan -- [Aumann, T. -- Caesar, C.] Tech Univ Darmstadt, D-64289 Darmstadt, Germany -- [Fukuda, T. -- Mizoi, Y.] Osaka Electrocommun Univ, Neyagawa, Osaka 5728530, Japan -- [Hiraiwa, T. -- Moritsu, M. -- Nagae, T. -- Okamura, A. -- Sako, M. -- Sugimura, H. -- Yokota, N.] Kyoto Univ, Kyoto 6068502, Japan -- [Le Fevre, A.] SUBATECH, F-44307 Nantes 3, France -- [Sekimoto, M. -- Takahashi, T.] KEK, Tsukuba, Ibaraki 3050801, Japan -- [Tamura, H.] Tohoku Univ, Aoba Ku, Sendai, Miyagi 9807875, Japan, and 0-Belirlenecek
- Subjects
Nuclear reaction ,(Li-6 ,E=2 GeV/nucleon ,Nuclear and High Energy Physics ,Maximum likelihood ,WEAK DECAY ,FOS: Physical sciences ,LIFETIME ,T-1/2. Compared with other data ,deduced Lambda mass ,C-12(LAMBDA) ,H-4) ,T-1/2 ,measured Lambda, H-3,H-4 Lambda-hypernuclei invariant mass distribution, T-1/2 ,measured Lambda ,Invariant mass ,Nuclear Experiment (nucl-ex) ,LIGHT HYPERFRAGMENTS ,Spectroscopy ,Nuclear Experiment ,X) ,Physics ,H-4 Lambda-hypernuclei invariant mass distribution ,H-3 ,Projectile ,Significance values ,lifetime measurement ,deduced Lambda mass, H-3,H-4 Lambda-hypernuclei mass, T-1/2. Compared with other data, lifetime measurement ,NUCLEAR REACTIONS C(Li-6 ,Decay time ,LAMBDA-HYPERNUCLEI ,Atomic physics ,t) ,NUCLEAR REACTIONS C(Li-6, X), (Li-6, t), (Li-6, H-4), E=2 GeV/nucleon ,H-4 Lambda-hypernuclei mass ,Hypertriton ,RELATIVISTIC HYPERNUCLEI - Abstract
WOS: 000322848900009, A novel experiment, aiming at demonstrating the feasibility of hypernuclear spectroscopy with heavy ion beams, was conducted. Using the invariant mass method, the spectroscopy of hypernuclear products of Li-6 projectiles on a carbon target at 2 A GeV was performed. Signals of the Lambda-hyperon and H-3(Lambda) and H-4(Lambda) hypernuclei were observed for final states of p + pi(-), He-3 + pi(-) and He-4 + pi(-), respectively, with significance values of 6.7, 4.7 and 4.9 sigma. By analyzing the proper decay time from secondary vertex distribution with the unbinned maximum likelihood fitting method, their lifetime values were deduced to be 262(-43)(+56) +/- 45 ps for Lambda, 183(-32)(+42) +/- 37 ps for H-3(Lambda), and 140(-33)(+48) +/- 35 ps for H-4(Lambda). (c) 2013 Elsevier B.V. All rights reserved., Electronics Department of the Institute for Nuclear Physics of Mainz University; Helmholtz association as Helmholtz-University Young Investigators Group at GSI [VH-NG-239]; German Research Foundation (DFG) [SA 1696/1-1]; Ministry of Education, Science and Culture of Japan [18042008]; EU FP7 Hadron-Physics-2 SPHERE; GSI Department of Accelerator; GSI Department of Experimental Electronics; GSI Department of the Detector Laboratory; GSI Department of the Target Laboratory, The authors would like to thank the GSI Departments of Accelerator, of Experimental Electronics, of the Detector Laboratory and of the Target Laboratory and the Electronics Department of the Institute for Nuclear Physics of Mainz University for supporting the project. The HypHI project is funded by the Helmholtz association as Helmholtz-University Young Investigators Group VH-NG-239 at GSI, and the German Research Foundation (DFG) under contract number SA 1696/1-1. The authors acknowledge the financial support provided by the Ministry of Education, Science and Culture of Japan, Grant-in-Aid for Scientific Research on Priority Areas 449, and Grant-in-Aid for promotion of Cooperative Research in Osaka Electro-Communication University (2004-2006). This work is also supported by the Ministry of Education, Science and Culture of Japan, Grants-in-Aid for Scientific Research 18042008 and EU FP7 Hadron-Physics-2 SPHERE. A part of this work was carried out on the HIMSTER high performance computing infrastructure provided by the Helmholtz-Institute Mainz.
- Published
- 2013
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