Dear Organizers,
5 abstratcs from the CMS Collaboration were merged into 2 abstratcs, see them below. In 2-3 days we plan to inform you about our speakers for 2 + 4 accepted parallel talks.
Thank you very much,
Sergey Petrushanko (for the CMS Conference Committee)
"Open heavy flavor production in PbPb collisions at the LHC with CMS"
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. Using the large statistics proton-proton and PbPb samples collected at 5.02 TeV during the 2015 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.
"Light and open heavy flavor production in pp and pPb collisions at the LHC with CMS"
The measurement of light and heavy production in pp and pPb collisions is considered a fundamental tool to evaluate the impact of vacuum and cold nuclear matter effects in heavy-ion collisions. The measurement of the nuclear modification factor RpA of charged particle provides an effective way to measure modifications of nuclear PDFs up to very high pT, allowing to access values of x that are much smaller than those that can be accessed with jet measurements. In the heavy flavour sector, 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. In this talk, the RpA of charged particles measured by CMS at 5 TeV will be presented together with 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. In addition, transverse momentum spectra of identified charged hadrons are presented in proton-proton collisions at sqrt(s) = 13 TeV. The pT spectra and integrated yields are compared to lower center-of-mass energy pp results and to Monte Carlo simulations.