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Öğe Event reconstruction methods for the HypHI Phase 0 experiment at GSI(ELSEVIER SCIENCE BV, 2010) Rappold, C.; Saito, T. R.; Bianchin, S.; Borodina, O.; Kavatsyuk, M.; Maas, F.; Trautmann, W.The first experiment of the HypHI project, Phase 0, at GSI-Darmstadt performs the feasibility study of precise hypernuclear spectroscopy with heavy ion induced reactions by using the collision of Li-6 at 2 A GeV on a C-12 target. In preparation of the Phase 0 experiment, simulation studies have been performed with a dedicated event reconstruction procedure. Details of this procedure will be discussed in this paper as well as the physics motivation of the Phase 0 and the experimental setup used during simulations. Expected results of the experiment will also be discussed. (C) 2010 Elsevier B.V. All rights reserved.Öğe On the measured lifetime of light hypernuclei H-3(Lambda) and H-4(Lambda)(ELSEVIER SCIENCE BV, 2014) Rappold, C.; Saito, T. R.; Bertini, O.; Bianchin, S.; Bozkurt, V.; Kavatsyuk, M.; Yoshida, K.A statistical combination of the experimental lifetime estimations available in the literatures is performed for H-3(Lambda) and H-4(Lambda), including several recent measurements. The combined average values of the lifetime for H-3(Lambda) and H-4(Lambda) are respectively 216(-16)(+19) ps and 192(-18)(+20) ps with a reduced chi(2) of 0.89 and 0.48. A new insight into the lifetime estimation of the HypHI Phase 0 experiment by a Bayesian approach is also presented. In this approach, several different prior distributions including the combination of previous lifetime data and a Jeffrey prior are used. The principal mode and the smallest credible interval at 68% of the posterior distribution, given by the prior belief of the previous measurements, are 217(-16)(+19) ps and 194(-18)(+20) ps respectively for H-3(Lambda) and H-4(Lambda). The two employed approaches have revealed that the lifetime of hypernuclei H-3(Lambda) and H-4(Lambda) can be shorter than the Lambda-hyperon lifetime. (C) 2013 The Authors. Published by Elsevier B.V. All rights reserved.Öğe The HypHI Phase 0 experiment(ELSEVIER SCIENCE BV, 2010) Saito, T. R.; Bianchin, S.; Borodina, O.; Bozkurt, V.; Gokuzum, B.; Kavatsyuk, M.; Aumann, T.The HypHI Phase 0 experiment to demonstrate the feasibility of precise hypernuclear spectroscopy with induced reactions of heavy ion beams was performed at GSI in August and October in 2009, with a projectile of Li-6 at 2 A GeV impinged on carbon graphite target with a thickness of 8 g/cm(2). The experiment mainly aims to reconstruct events of H-3(Lambda), H-4(Lambda) and He-5(Lambda) by observing the pi(-) decay channel. Details of the HypHI Phase 0 experiment performed in August in 2009 will be discussed.