22-27 September 2016
East Lake International Conference Center
Asia/Chongqing timezone
<a href="http://hp2016.ccnu.edu.cn">http://hp2016.ccnu.edu.cn</a>

Measurements of the suppression and anisotropy of heavy-flavour particles in Pb--Pb collisions at $\sqrt{s_{\rm{NN}}}$ = 2.76 TeV with ALICE

24 Sep 2016, 16:00
20m
Wuhan Hall (East Lake International Convention Center)

Wuhan Hall

East Lake International Convention Center

Speaker

Andrea Dubla (GSI)

Description

Heavy quarks, i.e. charm and beauty, are formed on a shorter time scale with respect to the strongly-interacting matter produced in high-energy heavy-ion collisions. Therefore, they are sensitive probes to study the mechanisms of parton energy loss, hadronisation and thermalization in the hot and dense state of matter.

The heavy-flavour nuclear modification factor ($R_{\rm AA}$) and the elliptic flow ($v_{2}$) are two of the main experimental observables that allow us to investigate the interaction strength of heavy quarks with the expanding medium.
$R_{\rm AA}$ accounts for the modification of heavy-flavour hadron yields in Pb--Pb collisions with respect to pp collisions, after the proper binary collision scaling is applied on the latter system. The comparison of the $R_{\rm AA}$ of charm, beauty and light-flavour hadrons can provide information about the colour-charge and parton-mass dependence of the parton energy loss.
At low $p_{\rm{T}}$ the $v_{2}$ is expected to bring insights into the degree of thermalization of heavy quarks in the deconfined medium, and at high $p_{\rm{T}}$ it carries information on the path-length dependence of in-medium parton energy loss.

In this talk, the $R_{\rm AA}$ and the $v_{2}$ of open heavy-flavour hadrons via their hadronic and semi-leptonic decays to electrons at mid-rapidity and to muons at forward rapidity in Pb--Pb collisions at $\sqrt{s_{\rm{NN}}}$ = 2.76 TeV will be discussed. Progress on the study of the $R_{\rm AA}$ of electrons from heavy-flavour and beauty-hadron decays will be also discussed. Comparisons with model calculations including the interaction of heavy quarks with the hot, dense, and deconfined medium will be discussed.

Presentation type Oral

Primary author

Andrea Dubla (GSI)

Presentation Materials