Evidence of rescattering effect in Pb-Pb collisions at the LHC through production of K*(892)(0) and phi(1020) mesons
文献类型：期刊论文
| 作者 | Acharya, S; Acosta, FT; Adam, J; Adamova, D; Adler, A; Adolfsson, J; Aggarwal, MM; Rinella, GA; Agnello, M; Agrawal, N |
| 刊名 | PHYSICS LETTERS B
 |
| 出版日期 | 2020 |
| 卷号 | 802页码:- |
| ISSN号 | 0370-2693 |
| 关键词 | QUARK-GLUON PLASMA RESONANCE PRODUCTION ROOT-S(NN)=200 GEV FREEZE-OUT ENERGY PERSPECTIVE PHYSICS MATTER AU+AU PIONS |
| DOI | 10.1016/j.physletb.2020.135225 |
| 文献子类 | 期刊论文 |
| 英文摘要 | Measurements of K*(892)(0) and phi(1020) resonance production in Pb-Pb and pp collisions at root s(NN) = 5.02 TeV with the ALICE detector at the Large Hadron Collider are reported. The resonances are measured at midrapidity (vertical bar y vertical bar < 0.5) via their hadronic decay channels and the transverse momentum (p(T)) distributions are obtained for various collision centrality classes up to p(T) = 20 GeV/c. The p(T)-integrated yield ratio K*(892)(0)/K in Pb-Pb collisions shows significant suppression relative to pp collisions and decreases towards more central collisions. In contrast, the phi(1020)/K ratio does not show any suppression. Furthermore, the measured K*(892)(0)/K ratio in central Pb-Pb collisions is significantly suppressed with respect to the expectations based on a thermal model calculation, while the phi(1020)/K ratio agrees with the model prediction. These measurements are an experimental demonstration of rescattering of K*(892)(0) decay products in the hadronic phase of the collisions. The K*(892)(0)/K yield ratios in Pb-Pb and pp collisions are used to estimate the time duration between chemical and kinetic freeze-out, which is found to be similar to 4-7 fm/c for central collisions. The p(T)-differential ratios of K*(892)(0)/K, phi(1020)/K, K*(892)(0)/pi, phi(1020)/pi, p/K*(892)(0) and p/phi(1020) are also presented for Pb-Pb and pp collisions at root s(NN) = 5.02 TeV. These ratios show that the rescattering effect is predominantly a low-p(T) phenomenon. (C) 2020 The Author(s). Published by Elsevier B.V. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/32864]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.NWU, Nara, Japan 2.Rudjer Boskovic Inst, Zagreb, Croatia 3.Natl Ctr Nucl Res, Warsaw, Poland 4.Yerevan Phys Inst, AI Alikhanyan Natl Sci Lab, Yerevan, Armenia 5.Natl Acad Sci Ukraine, Bogolyubov Inst Theoret Phys, Kiev, Ukraine 6.Bose Inst, Dept Phys, Kolkata, India 7.Bose Inst, Ctr Astroparticle Phys & Space Sci, Kolkata, India 8.Budker Inst Nucl Phys, Novosibirsk, Russia 9.Calif Polytechn State Univ, San Luis Obispo, CA USA 10.Cent China Normal Univ, Wuhan, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Acharya, S,Acosta, FT,Adam, J,et al. Evidence of rescattering effect in Pb-Pb collisions at the LHC through production of K*(892)(0) and phi(1020) mesons[J]. PHYSICS LETTERS B,2020,802:-. |
| APA | Acharya, S.,Acosta, FT.,Adam, J.,Adamova, D.,Adler, A.,...&Zmeskal, J.(2020).Evidence of rescattering effect in Pb-Pb collisions at the LHC through production of K*(892)(0) and phi(1020) mesons.PHYSICS LETTERS B,802,-. |
| MLA | Acharya, S,et al."Evidence of rescattering effect in Pb-Pb collisions at the LHC through production of K*(892)(0) and phi(1020) mesons".PHYSICS LETTERS B 802(2020):-. |
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来源：上海应用物理研究所
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