Evidence of rescattering effect in Pb-Pb collisions at the LHC through production of K*(892)(0) and phi(1020) mesons

doi:10.1016/j.physletb.2020.135225

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	*Evidence of rescattering effect in Pb-Pb collisions at the LHC through production of K(892)(0) and phi(1020) mesons**
	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
	2020
卷号	802 页码:-
关键词	QUARK-GLUON PLASMA RESONANCE PRODUCTION ROOT-S(NN)=200 GEV FREEZE-OUT ENERGY PERSPECTIVE PHYSICS MATTER AU+AU PIONS
ISSN号	0370-2693
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
内容类型	期刊论文
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):-.