Charm and beauty isolation from heavy flavor decay electrons in Au+Au collisions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.svg"><mml:msqrt><mml:mrow><mml:msub><mml:mrow><mml:mi>s</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="normal">NN</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:msqrt></mml:math> = 200 GeV at RHIC

Si, F.; Chen, Xiaolong; Zhou, Long; Zhang, Yifei; Zhang, Shenghui; Ju, X.; Li, Xiujun; Dong, X.; Xu, N.

doi:10.1016/j.physletb.2020.135465

Cited by 12 publications

(10 citation statements)

References 31 publications

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“…In previous study, the charm and beauty contributions are separated from the inclusive heavy flavor electrons (HFE) in 200 GeV Au+Au collisions at RHIC [20]. It was found that the electron AA from beauty decays is less suppressed compared to that from charm decays, which is consistent with the mass-dependent energy loss expectation.…”

Section: Introductionsupporting

confidence: 69%

“…We adopt the data-driven method developed in Ref. [20] to separate charm and beauty decay contributions from the inclusive HFE spectra [21] in 0-10% and 30-50% central Pb+Pb collisions at √ NN = 5.02 TeV at LHC by taking advantage of the most recent charmed hadron measurements. Different from the previous study at RHIC energy, the HFE measurement [21] from the ALICE experiment was not subtracted by the J∕ contribution (about 5% at 2 < T < 3 GeV/ and much lower in other T regions), and thus, the J∕ → + − contribution is also studied in this work.…”

Section: Transverse Momentum Spectra and Aamentioning

confidence: 99%

“…PbPb . Here we compare the results in 0-10% and 30-50% central Pb+Pb collisions with those in + collisions and the previous work in minimum bias Au+Au collisions [20]. The b→e pp is obtained by taking the ratio of the b → e [30] and inclusive HFE spectrum [21] (| | < 0.8) in + collisions measured by ALICE.…”

Section: Pbpb B→ementioning

confidence: 99%

“…However, considering the large uncertainties, the difference is not significant. The AA of electrons from individual charm and beauty hadron decays ( c→e AA and b→e AA ) are extracted with the formula [20]…”

Section: Pbpb B→ementioning

confidence: 99%

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Charm and beauty isolation from heavy flavor decay electrons in p+p and Pb+Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV at LHC

Li,

Si,

Zhao

et al. 2021

Preprint

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We present an analysis on the heavy flavor hadron decay electrons with charm and beauty contributions decomposed via a data driven method in Pb+Pb collisions at √ NN = 5.02 TeV at LHC. The transverse momentum T spectra, nuclear modification factor AA and azimuthal anisotropic flow 2 distributions of electrons from charm and beauty decays are obtained. We find that the electron AA from charm ( c→e AA ) and beauty ( b→e AA ) decays are suppressed at T > 2.0 and T > 3.0 GeV/ in Pb+Pb collisions, respectively, which indicates that charm and beauty interact with and lose their energy in the hot-dense medium. A less suppression of electron AA from beauty decays than that from charm decays at 2.0 < T < 8.0 GeV/ is observed, which is consistent with the mass-dependent partonic energy loss scenario. A non-zero electron 2 from beauty decays ( b→e 2 ) is observed and in good agreement with ALICE measurement. At low T region from 1.0 to 3.0 GeV/ , a discrepancy between RHIC and LHC results is observed with 68% confidence level, which suggests different degree of thermalization of beauty quark under different temperatures of the medium. At 3.0 GeV/ < T < 7.0 GeV/ , b→e 2 deviates from a number-of-constituent-quark (NCQ) scaling hypothesis, which favors that beauty quark is unlikely thermalized in heavy-ion collisions at LHC energy.

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Section: Introductionsupporting

confidence: 69%

Section: Transverse Momentum Spectra and Aamentioning

confidence: 99%

Section: Pbpb B→ementioning

confidence: 99%

Section: Pbpb B→ementioning

confidence: 99%

See 2 more Smart Citations

Charm and beauty isolation from heavy flavor decay electrons in p+p and Pb+Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV at LHC

Li,

Si,

Zhao

et al. 2021

Preprint

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“…In the extremely hot and dense condition created in relativistic heavy-ion collisions, those partons can be liberated via deconfinement to form Quark-Gluon Plasma (QGP) [1,2], which is believed to exist in the early universe around tens of microseconds after the Big Bang. Many experimental evidences show that the QGP is strongly coupled and behaves like a perfect liquid [3][4][5][6][7][8][9]. The Quantum Chromodynamics (QCD) predicts that at large temperature (T ) and small baryon chemical potential (µ B ), it is a smooth crossover from hadronic phase to partonic phase [10].…”

Section: Introductionmentioning

confidence: 99%

Effect of non-uniform efficiency on higher-order cumulants in heavy-ion collisions

Si,

Zhang,

Luo

2021

Preprint

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We perform a systematic study for the effect of non-uniform track efficiency on the efficiency correction of higher-order cumulant analysis in heavy-ion collisions. Through analytical derivation, we find that the true values of cumulants can be successfully reproduced by the efficiency correction with an average of the realistic detector efficiency for particles with the same charges within each single phase space. However, with taking an average across multiple phase spaces or introducing a non-averaged distribution, the efficiency correction for higher-order cumulants becomes invalid accordingly. During a toy model simulation by tuning the non-uniformity of the efficiency employed in the track-by-track efficiency correction method, the theoretical conclusions are supported and the valid averaged efficiency with less non-uniformity is found to suppress the statistical uncertainties of the reproduced cumulants dramatically. Thus, the usage of averaged efficiency requires a careful study for the phase space dependence. This study is important for carrying out precise measurement of higher-order cumulants for various detector acceptance in heavy-ion collision experiments at present and in future.

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An experimental review of open heavy flavor and quarkonium production at RHIC

2020

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

Cited by 12 publications

References 31 publications

Charm and beauty isolation from heavy flavor decay electrons in p+p and Pb+Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV at LHC

Charm and beauty isolation from heavy flavor decay electrons in p+p and Pb+Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV at LHC

Effect of non-uniform efficiency on higher-order cumulants in heavy-ion collisions

An experimental review of open heavy flavor and quarkonium production at RHIC

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