# Quark Matter 2018

13-19 May 2018
Venice, Italy
Europe/Zurich timezone
The organisers warmly thank all participants for such a lively QM2018! See you in China in 2019!

## $b\bar{b}$ dijet angular correlations in Pb+Pb collisions at $\sqrt{s}$= 8.8 TeV

15 May 2018, 17:00
2h 40m
First floor and third floor (Palazzo del Casinò)

### First floor and third floor

#### Palazzo del Casinò

Poster Correlations and fluctuations

### Speaker

Sa Wang (Central China Normal University)

### Description

Heavy flavoured jets are important in many of today's studies both as tests of QCD and as probes of hot and dense medium created shortly after the hard scattering. We notice that recently $b\bar{b}$ dijet correlations in proton-proton collisions have been measured by the CMS and ATLAS collaborations at the LHC, NLO+PS p+p baseline could give a rather perfect description of the experimental data than PYTHIA. Moreover detailed mechanisms of heavy flavoured jets propagation and energy loss in dense QCD matter are not yet fully investigated.
In this talk, we present the first predictions of the $b\bar{b}$ dijet angular correlations in Pb+Pb collision. In this work, a NLO+PS event generator SHERPA has been employed to give the p+p baseline and events, A Langevin evolution is used to describe the heavy quark evolution ,and the higher-twist approach is implemented to simulate the radiative energy loss of the gluon,heavy and light quarks simultaneously,and the hard-thermal-loop calculation is used to describe the collisional energy loss of light quarks and gluon. We predict the azimuthal angle $\Delta \phi$ , angular distance $\Delta R$ , and rapidity variables $y_B$ distributions of the normalized $b\bar{b}$ dijet production at the LHC 8.8 TeV. We find the energy loss of the $b\bar{b}$ dijet will suppress and broden the near side(small $\Delta \phi$)peak and also enhance and sharp the away side (near $\Delta \phi=\pi$ ) peak. We have also calculated the distribution of transverse momentum $p_T$ of $b\bar{b}$ dijet, the transverse momentum imbalance $X_j$ of back-to-back $b\bar{b}$ dijet pairs and the flavour asymmetry $A_b$ of mixed-flavour dijet pairs to gain new insight into heavy flavour dynamics in the quark-gluon plasma.

Content type Theory Presenter name already specified

### Primary author

Sa Wang (Central China Normal University)

### Co-authors

Dr Wei Dai (Central China Normal University) Ben-Wei Zhang (Central China Normal University) Enke Wang (Central China Normal University)