Article

Evidence of Mass Ordering of Charm and Bottom Quark Energy Loss in Au+Au Collisions at RHIC

M. S. AbdallahAmerican University of Cairo https://www.aucegypt.edu/B. E. AboonaTexas A &M University http://www.tamu.edu/J. AdamCzech Technical University in Prague, FNSPE https://www.fjfi.cvut.cz/cz/L. AdamczykAGH University of Science and Technology, FPACS https://www.agh.edu.pl/en/J. R. AdamsJ. K. AdkinsUniversity of Kentucky https://www.uky.edu/Y. HuPanjab University https://puchd.ac.in/M. M. AggarwalPanjab University https://puchd.ac.in/Z. AhammedVariable Energy Cyclotron Centre https://www.vecc.gov.in/D. M. AndersonTexas A &M University http://www.tamu.edu/E. C. AschenauerBrookhaven National Laboratory https://www.bnl.gov/world/J. AtchisonAbilene Christian University https://acu.edu/X. BaiInstituto de Alta Investigación, Universidad de Tarapacá https://www.uta.cl/index.php/investigacion/V. BairathiInstituto de Alta Investigación, Universidad de Tarapacá https://www.uta.cl/index.php/investigacion/W. BakerJ. BallUniversity of Houston https://www.uh.edu/K. N. BarishR. BellwiedUniversity of Houston https://www.uh.edu/P. BhagatUniversity of Jammu https://www.jammuuniversity.ac.in/A. BhasinUniversity of Jammu https://www.jammuuniversity.ac.in/S. BhattaState University of New York http://www.stonybrook.edu/J. BielčíkCzech Technical University in Prague, FNSPE https://www.fjfi.cvut.cz/cz/J. BielčíkováNuclear Physics Institute of the CAS http://www.ujf.cas.cz/en/J. D. BrandenburgBrookhaven National Laboratory https://www.bnl.gov/world/X. Z. CaiShanghai Institute of Applied Physics, Chinese Academy of Sciences http://english.sinap.cas.cn/H. CainesYale University https://www.yale.edu/M. Calderón de la Barca SánchezUniversity of California https://www.ucdavis.edu/D. CebraUniversity of California https://www.ucdavis.edu/I. ChakaberiaLawrence Berkeley National Laboratory https://www.lbl.gov/P. ChaloupkaCzech Technical University in Prague, FNSPE https://www.fjfi.cvut.cz/cz/B. K. ChanZ. ChangIndiana University http://www.indiana.edu/A. ChatterjeeWarsaw University of Technology https://www.fizyka.pw.edu.pl/index.phpS. ChattopadhyayVariable Energy Cyclotron Centre https://www.vecc.gov.in/D. ChenUniversity of California https://www.physics.ucr.edu/Jian ChenFudan University https://www.fudan.edu.cn/en/J. H. ChenFudan University https://www.fudan.edu.cn/en/X. ChenUniversity of Science and Technology of China https://en.ustc.edu.cn/Z. ChenShandong University https://en.sdu.edu.cn/J. ChengTsinghua University https://www.tsinghua.edu.cn/en/Y. ChengTsinghua University https://www.tsinghua.edu.cn/en/S. ChoudhuryFudan University https://www.fudan.edu.cn/en/W. ChristieBrookhaven National Laboratory https://www.bnl.gov/world/X. ChuBrookhaven National Laboratory https://www.bnl.gov/world/H. J. CrawfordUniversity of California https://www.berkeley.edu/M. CsanádELTE Eötvös Loránd University https://www.elte.hu/en/M. DaugherityAbilene Christian University https://acu.edu/I. M. DeppnerUniversity of Heidelberg https://www.uni-heidelberg.de/enA. DhamijaPanjab University https://puchd.ac.in/L. Di CarloWayne State University https://wayne.edu/L. DidenkoBrookhaven National Laboratory https://www.bnl.gov/world/P. DixitIndian Institute of Science Education and Research (IISER) https://www.iiserbpr.ac.in/X. DongLawrence Berkeley National Laboratory https://www.lbl.gov/J. L. DrachenbergAbilene Christian University https://acu.edu/E. DuckworthKent State University http://www.kent.edu/J. C. DunlopBrookhaven National Laboratory https://www.bnl.gov/world/J. EngelageUniversity of California https://www.berkeley.edu/G. EppleyRice University http://www.rice.edu/S. EsumiUniversity of Tsukuba https://www.tsukuba.ac.jp/en/O. EvdokimovUniversity of Illinois at Chicago https://www.uic.edu/A. EwiglebenLehigh University http://www1.lehigh.edu/homeO. EyserBrookhaven National Laboratory https://www.bnl.gov/world/R. FatemiUniversity of Kentucky https://www.uky.edu/F. M. FawziAmerican University of Cairo https://www.aucegypt.edu/S. FazioUniversity of Calabria, INFN-Cosenza https://www.unical.it/C. FengNational Cheng Kung University https://www.ncku.edu.tw/Yongbin FengPurdue University https://www.purdue.edu/E. FinchSouthern Connecticut State University https://www.southernct.edu/Y. FisyakBrookhaven National Laboratory https://www.bnl.gov/world/A. FranciscoYale University https://www.yale.edu/C. FuCentral China Normal University http://english.ccnu.edu.cn/C. A. GagliardiTexas A &M University http://www.tamu.edu/T. GalatyukTechnische Universität Darmstadt https://www.tu-darmstadt.de/F. J. M. GeurtsRice University http://www.rice.edu/N. GhimireTemple University https://www.temple.edu/S. M. GibsonValparaiso University http://www.valpo.edu/K. GopalIndian Institute of Science Education and Research (IISER) Tirupati http://www.iisertirupati.ac.in/X. GouShandong University https://en.sdu.edu.cn/D. GrosnickValparaiso University http://www.valpo.edu/A. GuptaUniversity of Jammu https://www.jammuuniversity.ac.in/W. GurynBrookhaven National Laboratory https://www.bnl.gov/world/A. HamedAmerican University of Cairo https://www.aucegypt.edu/Y. HanRice University http://www.rice.edu/S. HarabaszTechnische Universität Darmstadt https://www.tu-darmstadt.de/M. D. HarastyUniversity of California https://www.ucdavis.edu/J. W. HarrisYale University https://www.yale.edu/H. HarrisonUniversity of Kentucky https://www.uky.edu/S. HeCentral China Normal University http://english.ccnu.edu.cn/W. HeFudan University https://www.fudan.edu.cn/en/Y. HeShandong University https://en.sdu.edu.cn/S. HeppelmannUniversity of California https://www.ucdavis.edu/N. HerrmannUniversity of Heidelberg https://www.uni-heidelberg.de/enEric A. HoffmanUniversity of Houston https://www.uh.edu/L. HolubCzech Technical University in Prague, FNSPE https://www.fjfi.cvut.cz/cz/Chengyu HuInstitute of Modern PhysicsQihou HuInstitute of Modern Physics, Chinese Academy of Sciences https://english.imp.cas.cn/Handong HuangNational Cheng Kung University https://www.ncku.edu.tw/Heng HuangNational Cheng Kung University https://www.ncku.edu.tw/

The European Physical Journal Cjournal2022en

ABI

Abstract

Abstract Partons traversing the strongly interacting medium produced in heavy-ion collisions are expected to lose energy depending on their color charge and mass. We measure the nuclear modification factors for charm- and bottom-decay electrons, defined as the ratio of yields, divided by the number of binary nucleon–nucleon collisions, in $$\sqrt{s_{\textrm{NN}}}=200$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msqrt> <mml:msub> <mml:mi>s</mml:mi> <mml:mtext>NN</mml:mtext> </mml:msub> </mml:msqrt> <mml:mo>=</mml:mo> <mml:mn>200</mml:mn> </mml:mrow> </mml:math> GeV Au+Au collisions to p + p collisions ( $$R_{\textrm{AA}}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>R</mml:mi> <mml:mtext>AA</mml:mtext> </mml:msub> </mml:math> ), or in central to peripheral Au+Au collisions ( $$R_{\textrm{CP}}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>R</mml:mi> <mml:mtext>CP</mml:mtext> </mml:msub> </mml:math> ). We find the bottom-decay electron $$R_{\textrm{AA}}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>R</mml:mi> <mml:mtext>AA</mml:mtext> </mml:msub> </mml:math> and $$R_{\textrm{CP}}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>R</mml:mi> <mml:mtext>CP</mml:mtext> </mml:msub> </mml:math> to be significantly higher than those of charm-decay electrons. Model calculations including mass-dependent parton energy loss in a strongly coupled medium are consistent with the measured data. These observations provide evidence of mass ordering of charm and bottom quark energy loss when traversing through the strongly coupled medium created in heavy-ion collisions.

Topics

High-Energy Particle Collisions Research Quantum Chromodynamics and Particle Interactions Particle physics theoretical and experimental studies

Identifiers

DOI: 10.1140/epjc/s10052-022-11003-7

Citations and references

Cited by 068 references

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