18–22 Sept 2017
Polish Academy of Arts and Sciences
Europe/Warsaw timezone

Heavy flavour production at the LHC energies with CMS

20 Sept 2017, 17:00
20m
Main Lecture Hall (Główna Aula)

Main Lecture Hall (Główna Aula)

Speaker

Bozena Boimska (National Centre for Nuclear Research (PL))

Description

The measurement of heavy flavour production is a powerful tool to study the properties of the high-density QCD medium created in heavy-ion collisions as heavy quarks are sensitive to the transport properties of the medium and may interact with the QCD matter differently from light quarks. In particular, the comparison between the nuclear modification factors (RAA) of light- and heavy-flavour particles provides insights into the expected flavour dependence of in-medium parton energy loss. Furthermore, azimuthal anisotropy coefficient (vn) of heavy-flavor particles provide insights into the degree of the thermalization of the bulk medium at low pT, and unique information about the path length dependence of heavy quark energy loss at high pT. In proton-nucleus collisions, precise measurements of the RpA of D and B mesons down to very low pT are considered unique tools to investigate the role of PDF modifications at very low values of x in an environment that is less affected by non-perturbative hadronization effects. Using the large statistics proton-proton, PbPb and pPb samples collected at 5.02 TeV during the 2015 and 2016 LHC run, high precision open charm and beauty measurements are performed with the CMS detector in a wide transverse momentum range. This allows us to set an important milestone in our understanding of the interactions between heavy quarkas and the medium. In this talk, the most recent results of RAA, v2 and v3 of D0 mesons, and the RAA of the B mesons in PbPb collisions at 5.02 TeV are presented and compared to the same results for charged hadrons at the same energy. The latest results for heavy-flavour production in proton-nucleus collisions at 5 and 8 TeV using the recent high-statistics data collected in the 2016 run will also be presented.

Primary author

Bozena Boimska (National Centre for Nuclear Research (PL))

Presentation materials