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.