Comparison of inclusive K+ production in proton-proton and proton-neutron collisions

被引:2
作者
Valdau, Yu. [1 ,2 ,3 ]
Koptev, V. [1 ]
Barsov, S. [1 ]
Buescher, M. [2 ,3 ]
Dzyuba, A. [1 ]
Hartmann, M. [2 ,3 ]
Kacharava, A. [2 ,3 ]
Keshelashvili, I. [4 ]
Khoukaz, A. [5 ]
Mikirtychiants, S. [1 ,2 ,3 ]
Nekipelov, M. [2 ,3 ]
Polyanskiy, A. [2 ,3 ,6 ]
Rathmann, F. [2 ,3 ]
Stroeher, H. [2 ,3 ]
Uzikov, Yu. N. [7 ]
Wilkin, C. [8 ]
机构
[1] Petersburg Nucl Phys Inst, High Energy Phys Dept, RU-188350 Gatchina, Russia
[2] Forschungszentrum Julich, Inst Kernphys, DE-52425 Julich, Germany
[3] Forschungszentrum Julich, Julich Ctr Hadron Phys, DE-52425 Julich, Germany
[4] Univ Basel, Dept Phys, CH-4056 Basel, Switzerland
[5] Univ Munster, Inst Kernphys, DE-48149 Munster, Germany
[6] Inst Theoret & Expt Phys, RU-117218 Moscow, Russia
[7] Joint Inst Nucl Res, Lab Nucl Problems, RU-141980 Dubna, Russia
[8] UCL, Dept Phys & Astron, London WC1E 6BT, England
关键词
HYPERON PRODUCTION; MESON PRODUCTION; NEAR-THRESHOLD; CROSS-SECTION; LAMBDA-P; COSY; RESONANCES; GEV/C; MODEL; SPIN;
D O I
10.1103/PhysRevC.84.055207
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
The momentum spectra of K+ produced at small angles in proton-proton and proton-deuteron collisions have been measured at four beam energies, 1.826, 1.920, 2.020, and 2.650 GeV, using the ANKE spectrometer at COSY-Julich. After making corrections for Fermi motion and shadowing, the data indicate that K+ production near threshold is stronger in pp- than in pn-induced reactions. However, most of this difference could be made up by the unobserved K-0 production in the pn case.
引用
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页数:6
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