Charm and beauty isolation from heavy flavor decay electrons in Au+Au collisions at sNN = 200 GeV at RHIC

We present a study of charm and beauty isolation based on a data-driven method with recent measurements on heavy flavor hadrons and their decay electrons in Au+Au collisions at sNN = 200 GeV at RHIC. The individual electron pT spectra, RAA and v2 distributions from charmed and beauty hadron decays a...

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Main Authors:	Fan Si, Xiao-Long Chen, Long Zhou, Yi-Fei Zhang, Sheng-Hui Zhang, Xin-Yue Ju, Xiu-Jun Li, Xin Dong, Nu Xu
Format:	Article
Language:	English
Published:	Elsevier 2020-06-01
Series:	Physics Letters B
Subjects:	Quark-gluon plasma Charm Beauty Semileptonic decay Nuclear modification factor Elliptic flow
Online Access:	http://www.sciencedirect.com/science/article/pii/S0370269320302690

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spelling	doaj-4e6db4ee6d634b20ac7beb410e35c46c2020-11-25T03:48:03ZengElsevierPhysics Letters B0370-26932020-06-01805Charm and beauty isolation from heavy flavor decay electrons in Au+Au collisions at sNN = 200 GeV at RHICFan Si0Xiao-Long Chen1Long Zhou2Yi-Fei Zhang3Sheng-Hui Zhang4Xin-Yue Ju5Xiu-Jun Li6Xin Dong7Nu Xu8State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, ChinaState Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, ChinaState Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, ChinaState Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, China; Corresponding author.State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, ChinaState Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, ChinaState Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, ChinaLawrence Berkeley National Laboratory, Berkeley, CA 94720, USALawrence Berkeley National Laboratory, Berkeley, CA 94720, USA; Institute of Modern Physics of CAS, Lanzhou 730000, ChinaWe present a study of charm and beauty isolation based on a data-driven method with recent measurements on heavy flavor hadrons and their decay electrons in Au+Au collisions at sNN = 200 GeV at RHIC. The individual electron pT spectra, RAA and v2 distributions from charmed and beauty hadron decays are obtained. We find that the electron RAA from beauty hadron decays (RAAb→e) is suppressed in minimum bias Au+Au collisions but less suppressed compared with that from charmed hadron decays at pT > 3.5 GeV/c, which indicates that beauty quark interacts with the hot-dense medium with depositing its energy and is consistent with the mass-dependent energy loss scenario. For the first time, the non-zero electron v2 from beauty hadron decays (v2b→e) at pT > 3.0 GeV/c is observed and shows smaller elliptic flow compared with that from charmed hadron decays at pT < 4.0 GeV/c. At 2.5 GeV/c < pT < 4.5 GeV/c, v2b→e is smaller than a number-of-constituent-quark (NCQ) scaling hypothesis. This suggests that beauty quark is unlikely thermalized and too heavy to be moved in a partonic collectivity in heavy-ion collisions at the RHIC energy.http://www.sciencedirect.com/science/article/pii/S0370269320302690Quark-gluon plasmaCharmBeautySemileptonic decayNuclear modification factorElliptic flow
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Fan Si Xiao-Long Chen Long Zhou Yi-Fei Zhang Sheng-Hui Zhang Xin-Yue Ju Xiu-Jun Li Xin Dong Nu Xu
spellingShingle	Fan Si Xiao-Long Chen Long Zhou Yi-Fei Zhang Sheng-Hui Zhang Xin-Yue Ju Xiu-Jun Li Xin Dong Nu Xu Charm and beauty isolation from heavy flavor decay electrons in Au+Au collisions at sNN = 200 GeV at RHIC Physics Letters B Quark-gluon plasma Charm Beauty Semileptonic decay Nuclear modification factor Elliptic flow
author_facet	Fan Si Xiao-Long Chen Long Zhou Yi-Fei Zhang Sheng-Hui Zhang Xin-Yue Ju Xiu-Jun Li Xin Dong Nu Xu
author_sort	Fan Si
title	Charm and beauty isolation from heavy flavor decay electrons in Au+Au collisions at sNN = 200 GeV at RHIC
title_short	Charm and beauty isolation from heavy flavor decay electrons in Au+Au collisions at sNN = 200 GeV at RHIC
title_full	Charm and beauty isolation from heavy flavor decay electrons in Au+Au collisions at sNN = 200 GeV at RHIC
title_fullStr	Charm and beauty isolation from heavy flavor decay electrons in Au+Au collisions at sNN = 200 GeV at RHIC
title_full_unstemmed	Charm and beauty isolation from heavy flavor decay electrons in Au+Au collisions at sNN = 200 GeV at RHIC
title_sort	charm and beauty isolation from heavy flavor decay electrons in au+au collisions at snn = 200 gev at rhic
publisher	Elsevier
series	Physics Letters B
issn	0370-2693
publishDate	2020-06-01
description	We present a study of charm and beauty isolation based on a data-driven method with recent measurements on heavy flavor hadrons and their decay electrons in Au+Au collisions at sNN = 200 GeV at RHIC. The individual electron pT spectra, RAA and v2 distributions from charmed and beauty hadron decays are obtained. We find that the electron RAA from beauty hadron decays (RAAb→e) is suppressed in minimum bias Au+Au collisions but less suppressed compared with that from charmed hadron decays at pT > 3.5 GeV/c, which indicates that beauty quark interacts with the hot-dense medium with depositing its energy and is consistent with the mass-dependent energy loss scenario. For the first time, the non-zero electron v2 from beauty hadron decays (v2b→e) at pT > 3.0 GeV/c is observed and shows smaller elliptic flow compared with that from charmed hadron decays at pT < 4.0 GeV/c. At 2.5 GeV/c < pT < 4.5 GeV/c, v2b→e is smaller than a number-of-constituent-quark (NCQ) scaling hypothesis. This suggests that beauty quark is unlikely thermalized and too heavy to be moved in a partonic collectivity in heavy-ion collisions at the RHIC energy.
topic	Quark-gluon plasma Charm Beauty Semileptonic decay Nuclear modification factor Elliptic flow
url	http://www.sciencedirect.com/science/article/pii/S0370269320302690
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Charm and beauty isolation from heavy flavor decay electrons in Au+Au collisions at sNN = 200 GeV at RHIC

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