Azimuthally-differential pion femtoscopy relative to the third harmonic event plane in Pb-Pbcollisions at root(NN)-N-S=2.76TeV

doi:10.1016/j.physletb.2018.06.042

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Azimuthally-differential pion femtoscopy relative to the third harmonic event plane in Pb-Pbcollisions at root(NN)-N-S=2.76TeV
	Acharya, S ; Acosta, FT ; Adamova, D ; Adolfsson, J ; Aggarwal, MM ; Rinella, GA ; Agnello, M ; Agrawal, N ; Ahammed, Z ; Ahn, SU
刊名	PHYSICS LETTERS B
	2018
卷号	785 期号:-页码:320-331
关键词	INTERFEROMETRY COLLISIONS FLOW
ISSN号	0370-2693
DOI	10.1016/j.physletb.2018.06.042
文献子类	期刊论文
英文摘要	Azimuthally-differential femtoscopic measurements, being sensitive to spatio-temporal characteristics of the source as well as to the collective velocity fields at freeze out, provide very important information on the nature and dynamics of the system evolution. While the HBT radii oscillations relative to the second harmonic event plane measured recently reflect mostly the spatial geometry of the source, model studies have shown that the HBT radii oscillations relative to the third harmonic event plane are predominantly defined by the velocity fields. In this Letter, we present the first results on azimuthally-differential pion femtoscopy relative to the third harmonic event plane as a function of the pion pair transverse momentum k(T) for different collision centralities in Pb-Pb collisions at root(NN)-N-S = 2.76TeV. We find that the R-side and R-out radii, which characterize the pion source size in the directions perpendicular and parallel to the pion transverse momentum, oscillate in phase relative to the third harmonic event plane, similar to the results from 3+1D hydrodynamical calculations. The observed radii oscillations unambiguously signal a collective expansion and anisotropy in the velocity fields. A comparison of the measured radii oscillations with the Blast-Wave model calculations indicate that the initial state triangularity is washedout at freeze out. (C) 2018 European Organization for Nuclear Research. 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/331007/30857]
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.Univ Tokyo, Tokyo, Japan 2.Univ Wroclaw, Inst Theoret Phys, Wroclaw, Poland 3.AI Aikhanyan Natl Sci Lab Yerevan Phys Inst Fdn, Yerevan, Armenia 4.Benemerita Univ Autonoma Puebla, Puebla, Mexico 5.Natl Acad Sci Ukraine, Bogolyubov Inst Theoret Phys, Kiev, Ukraine 6.Bose Inst, Dept Phys, Kolkata, India 7.Bose Inst, CAPSS, Kolkata, India 8.Budker Inst Nucl Phys, Novosibirsk, Russia 9.Calif Polytech State Univ San Luis Obispo, San Luis Obispo, CA 93407 USA 10.Cent China Normal Univ, Wuhan, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Acharya, S,Acosta, FT,Adamova, D,et al. Azimuthally-differential pion femtoscopy relative to the third harmonic event plane in Pb-Pbcollisions at root(NN)-N-S=2.76TeV[J]. PHYSICS LETTERS B,2018,785(-):320-331.
APA	Acharya, S.,Acosta, FT.,Adamova, D.,Adolfsson, J.,Aggarwal, MM.,...&Zou, S.(2018).Azimuthally-differential pion femtoscopy relative to the third harmonic event plane in Pb-Pbcollisions at root(NN)-N-S=2.76TeV.PHYSICS LETTERS B,785(-),320-331.
MLA	Acharya, S,et al."Azimuthally-differential pion femtoscopy relative to the third harmonic event plane in Pb-Pbcollisions at root(NN)-N-S=2.76TeV".PHYSICS LETTERS B 785.-(2018):320-331.