EPJ Web Conf.
Volume 158, 2017The XXIII International Workshop “High Energy Physics and Quantum Field Theory” (QFTHEP 2017)
|Number of page(s)||10|
|Section||Theoretical and Experimental Studies of Flavor Physics and Exotic States|
|Published online||24 October 2017|
Z-boson production in association with heavy flavor in the kT-factorization
1 Skobeltsyn Institute of Nuclear Physics, Moscow State University, 119991 Moscow, Russia
2 P.N. Lebedev Physics Institute, 119991 Moscow, Russia
3 Joint Institute for Nuclear Research, Dubna 141980, Moscow region, Russia
Published online: 24 October 2017
We present the calculations of associated production of Z bosons and heavy (charm or beauty) quarks at the LHC energies in the framework of kT -factorization QCD approach. Our consideration is mainly based on the off-shell gluon-gluon fusion subprocess where produced Z boson subsequently decays into a lepton pair. Several subleading contributions from the and subprocesses are taken into account. Contributions from the double parton scattering mechanism are estimated. The transverse momentum dependent (or unintegrated) gluon densities in a proton are determined using the Catani-Ciafaloni-Fiorani-Marchesini evolution equation. We achieve reasonably good agreement of our predictions and latest experimental data taken by the CMS and ATLAS Collaborations, discuss the theoretical uncertainties of our calculations and demonstrate the importance of subleading quark contributions in description of the LHC data in the whole kinematical region.
© The authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.