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Title: Impact of heavy-flavour production cross sections measured by the LHCb experiment on parton distribution functions at low x

The impact of recent measurements of heavy-flavour production in deep inelastic ep scattering and in pp collisions on parton distribution functions is studied in a QCD analysis in the fixed-flavour number scheme at next-to-leading order. Differential cross sections of charm- and beauty-hadron production measured by LHCb are used together with inclusive and heavy-flavour production cross sections in deep inelastic scattering at HERA. The heavy-flavour data of the LHCb experiment impose additional constraints on the gluon and the sea-quark distributions at low partonic fractions x of the proton momentum, down to x~5×10 -6. This kinematic range is currently not covered by other experimental data in perturbative QCD fits.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [3] ;  [4] ;  [1] ;  [3] ;  [5] ;  [1] ;  [6] ;  [7] ;  [1]
  1. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
  2. Univ. of Oxford, Oxford (United Kingdom)
  3. Univ. Hamburg, Hamburg (Germany)
  4. Univ. of Manchester, Manchester (United Kingdom)
  5. Southern Methodist Univ., Dallas, TX (United States)
  6. Karlsruhe Inst. of Technology (KIT), Karlsruhe (Germany)
  7. LPSC Grenoble, Grenoble (France)
Publication Date:
Grant/Contract Number:
SC0013681
Type:
Accepted Manuscript
Journal Name:
European Physical Journal. C, Particles and Fields
Additional Journal Information:
Journal Volume: 75; Journal Issue: 8; Journal ID: ISSN 1434-6044
Publisher:
Springer
Research Org:
Southern Methodist Univ., Dallas, TX (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
OSTI Identifier:
1257283

Zenaiev, O., Geiser, A., Lipka, K., Blumlein, J., Cooper-Sarkar, A., Garzelli, M. -V., Guzzi, M., Kuprash, O., Moch, S. -O., Nadolsky, P., Placakyte, R., Rabbertz, K., Schienbein, I., and Starovoitov, P.. Impact of heavy-flavour production cross sections measured by the LHCb experiment on parton distribution functions at low x. United States: N. p., Web. doi:10.1140/epjc/s10052-015-3618-z.
Zenaiev, O., Geiser, A., Lipka, K., Blumlein, J., Cooper-Sarkar, A., Garzelli, M. -V., Guzzi, M., Kuprash, O., Moch, S. -O., Nadolsky, P., Placakyte, R., Rabbertz, K., Schienbein, I., & Starovoitov, P.. Impact of heavy-flavour production cross sections measured by the LHCb experiment on parton distribution functions at low x. United States. doi:10.1140/epjc/s10052-015-3618-z.
Zenaiev, O., Geiser, A., Lipka, K., Blumlein, J., Cooper-Sarkar, A., Garzelli, M. -V., Guzzi, M., Kuprash, O., Moch, S. -O., Nadolsky, P., Placakyte, R., Rabbertz, K., Schienbein, I., and Starovoitov, P.. 2015. "Impact of heavy-flavour production cross sections measured by the LHCb experiment on parton distribution functions at low x". United States. doi:10.1140/epjc/s10052-015-3618-z. https://www.osti.gov/servlets/purl/1257283.
@article{osti_1257283,
title = {Impact of heavy-flavour production cross sections measured by the LHCb experiment on parton distribution functions at low x},
author = {Zenaiev, O. and Geiser, A. and Lipka, K. and Blumlein, J. and Cooper-Sarkar, A. and Garzelli, M. -V. and Guzzi, M. and Kuprash, O. and Moch, S. -O. and Nadolsky, P. and Placakyte, R. and Rabbertz, K. and Schienbein, I. and Starovoitov, P.},
abstractNote = {The impact of recent measurements of heavy-flavour production in deep inelastic ep scattering and in pp collisions on parton distribution functions is studied in a QCD analysis in the fixed-flavour number scheme at next-to-leading order. Differential cross sections of charm- and beauty-hadron production measured by LHCb are used together with inclusive and heavy-flavour production cross sections in deep inelastic scattering at HERA. The heavy-flavour data of the LHCb experiment impose additional constraints on the gluon and the sea-quark distributions at low partonic fractions x of the proton momentum, down to x~5×10-6. This kinematic range is currently not covered by other experimental data in perturbative QCD fits.},
doi = {10.1140/epjc/s10052-015-3618-z},
journal = {European Physical Journal. C, Particles and Fields},
number = 8,
volume = 75,
place = {United States},
year = {2015},
month = {8}
}