Non-resonant kaon pair production and medium effects in proton-nucleus collisions

被引：9

作者：

Paryev, E. Ya ^{[1
,2
]}

Hartmann, M. ^{[3
,4
]}

Kiselev, Yu T. ^{[2
]}

机构：

[1] Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia

[2] Inst Theoret & Expt Phys, Moscow 117218, Russia

[3] Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany

[4] Forschungszentrum Julich, Julich Ctr Hadron Phys, D-52425 Julich, Germany

来源：

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 2015年 / 42卷 / 07期

关键词：

kaon production; kaon in-medium potential; in-medium effects; HEAVY-ION COLLISIONS; IN-FLIGHT K; ANTIKAON PRODUCTION; MESON PRODUCTION; CROSS-SECTIONS; (K)OVER-BAR; SEARCH; STATES;

D O I：

10.1088/0954-3899/42/7/075107

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：

We study the non-resonant (non-phi) production of K+K- pairs by protons of 2.83 GeV kinetic energy on C, Cu, Ag and Au targets within the collision model, based on the nuclear spectral function, for incoherent primary proton-nucleon and secondary pion-nucleon creation processes. The model takes into account the initial proton and final kaon absorption, target nucleon binding and Fermi motion as well as nuclear mean-field potential effects on these processes. We calculate the antikaon momentum dependences of the exclusive absolute and relative K+K- pair yields in the acceptance window of the ANKE magnetic spectrometer, used in a recent experiment performed at COoler SYnchrotron (COSY), within the different scenarios for the antikaon-nucleus optical potential. We demonstrate that the above observables are strongly sensitive to this potential. Therefore, they can be useful to help determine the K- optical potential from the direct comparison of the results of our calculations with the data from the respective ANKE-at-COSY experiment. We also show that the pion-nucleon production channels dominate in the low-momentum K-, K+ production in the considered kinematics and, hence, they have to be accounted for in the analysis of these data.

引用

页数：20

共 74 条

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