Production of K- p and K+ (p)over-bar bound states in pp collisions and interpretation of the Λ (1405) resonance

被引：6
作者：
Sittiketkorn, Panadda [1 ]
Tomuang, Kristiya [1 ]
Srisawad, Pornrad [1 ]
Limphirat, Ayut [2 ,3 ]
Herold, Christoph [2 ,3 ]
Yan, Yu-Liang [4 ]
Chen, Gang [5 ]
Zhou, Dai-Mei [6 ,7 ]
Kobdaj, Chinorat [2 ,3 ]
Yan, Yupeng [2 ,3 ]
机构：
[1] Naresuan Univ, Dept Phys, Phitsanulok 65000, Thailand
[2] Suranaree Univ Technol, Sch Phys, Nakhon Ratchasima 30000, Thailand
[3] Suranaree Univ Technol, Ctr Excellence High Energy Phys & Astrophys, Nakhon Ratchasima 30000, Thailand
[4] China Inst Atom Energy, POB 275,10, Beijing 102413, Peoples R China
[5] China Univ Geosci, Sch Math & Phys, Wuhan 430074, Peoples R China
[6] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Hubei, Peoples R China
[7] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Hubei, Peoples R China
来源：
PHYSICAL REVIEW C | 2017年 / 96卷 / 06期
关键词：
RELATIVISTIC QUARK-MODEL; LIGHT-BARYON SPECTRUM; CHIRAL DYNAMICS; EFFECTIVE-MASS; ENERGY; DEPENDENCE; ASTERISK; PARTON; FORCES; ETA;
D O I：
10.1103/PhysRevC.96.064002
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 production of charged particles (K+, K-, p, and (p) over bar) in proton-proton (pp) collisions at root s = 0.9 TeV within the PACIAE model whose parameters we fix by comparing the yield of charged particles with experimental data from ALICE. We analyze the production of K- p and K+ (p) over bar bound states with the PACIAE+DCPC model. Results of our work indicate that in pp collisions at root s = 0.9 TeV the Lambda(1405) and its antiparticle may be produced at almost the same rate if the Lambda(1405) is a K- p bound state formed during the hadron rescattering period. The combined yield of K- p and K+ (p) over bar bound states is found to be of the order of 10(-3), but the experimental results indicate that the combined yield of Lambda(1405) + (Lambda) over bar (1405) is of the order of 10(-2) if Lambda(1405) is a standard three-quark baryon. Since there are no experimental data available on this observable at present, our work may provide a guide for future experiments.
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页数：5
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