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24 April 2024 |
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Article overview
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Too heavy to be moved | | Fan Si
; Xiao-Long Chen
; Long Zhou
; Yi-Fei Zhang
; Sheng-Hui Zhang
; Xin-Yue Ju
; Xiu-Jun Li
; Xin Dong
; Nu Xu
; | | Date: |
21 Jun 2019 | | Abstract: | We present a study of beauty and charm isolation based on a data driven
method with recent heavy flavor hadrons and their decay electron measurements
in Au+Au collisions at $sqrt{s_{
m NN}}$ = 200 GeV at RHIC. The individual
electron transverse momentum spectra, $R_{
m AA}$ and $v_2$ distributions from
charm and beauty decays are obtained. We found that the electron $R_{
m AA}$
from beauty decays ($R_{
m AA}^{
m b
ightarrow e}$) are suppressed in
minimum bias Au+Au collisions but less suppressed compared with that from charm
decays at $p_T$ $>$ 3.5 GeV/$c$, which indicates that beauty interacts with the
hot-dense medium with depositing its energy and is consistent with the
mass-dependent energy loss scenario. And the first time, the non-zero electron
$v_2$ from beauty decays ($v_{2}^{
m b
ightarrow e}$) at $p_T$ $>$ 3.0
GeV/$c$ is observed and shows smaller flow compared with that from charm decays
at $p_T$ $<$ 4.0 GeV/$c$. At 2.5 $<$ $p_T$ $<$ 4.5 GeV/$c$, $v_{2}^{
m
b
ightarrow e}$ is smaller than a number-of-constituent-quark (NCQ) scaling
hypothesis, which indicates that beauty quark is unlikely thermalized and too
heavy to be moved in a partonic collectivity in heavy-ion collisions at RHIC
energy. | | Source: | arXiv, 1906.8974 | | Services: | Forum | Review | PDF | Favorites | |
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