Chirally motivated (K)over-barN amplitudes for in-medium applications

被引:84
作者
Cieply, A. [1 ]
Smejkal, J. [2 ]
机构
[1] Acad Sci Czech Republic, Inst Nucl Phys, CZ-25068 Rez, Czech Republic
[2] Czech Tech Univ, Inst Expt & Appl Phys, Prague 12800 2, Czech Republic
关键词
Chiral model; Kaon-nucleon amplitude; Nuclear medium effects; Optical potential; Hypernuclei; KAON-NUCLEON INTERACTIONS; DYNAMICS; HYDROGEN; LAMBDA(1405); CONSTRAINTS; POTENTIALS; STATES;
D O I
10.1016/j.nuclphysa.2012.01.028
中图分类号
O57 [原子核物理学、高能物理学];
学科分类号
070202 ;
摘要
A new fit of a chirally motivated coupled-channel model for meson-baryon interactions is presented including the recent SIDDHARTA data on the Is level characteristics of kaonic hydrogen. The kaon-nucleon amplitudes generated by the model are fully consistent with our earlier studies. We argue that a sharp increase of the real part of the in-medium K- p amplitude at subthreshold energies provides a link between the shallow (K) over bar -nuclear optical potentials obtained microscopically from threshold (K) over barN interactions and the phenomenological deep ones deduced from kaonic atoms data. The impact on the A-dependence of the Lambda-hypernuclear formation rates measured in reactions with stopped kaons is discussed too. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码:115 / 126
页数:12
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