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Title: CT14 intrinsic charm parton distribution functions from CTEQ-TEA global analysis

Abstract

We investigate the possibility of a (sizable) nonperturbative contribution to the charm parton distribution function (PDF) in a nucleon, theoretical issues arising in its interpretation, and its potential impact on LHC scattering processes. The “fitted charm” PDF obtained in various QCD analyses contains a process-dependent component that is partly traced to power-suppressed radiative contributions in DIS and is generally different at the LHC. We discuss separation of the universal component of the nonperturbative charm from the rest of the radiative contributions and estimate its magnitude in the CT14 global QCD analysis at the next-to-next-to leading order in the QCD coupling strength, including the latest experimental data from HERA and the Large Hadron Collider. Models for the nonperturbative charm PDF are examined as a function of the charm quark mass and other parameters. The prospects for testing these models in the associated production of a Z boson and a charm jet at the LHC are studied under realistic assumptions, including effects of the final-state parton showering.

Authors:
 [1];  [2];  [3];  [4];  [5];  [1];  [5];  [5];  [1];  [5]
  1. Southern Methodist Univ., Dallas, TX (United States). Dept. of Physics
  2. Xinjiang Univ., Urumqi (China). School of Physics Science and Technology. Center for Theoretical Physics; Michigan State Univ., East Lansing, MI (United States). Dept. of Physics and Astronomy
  3. Shanghai Jiao Tong Univ. (China). School of Physics and Astronomy. INPAC. Shanghai Key Lab. for Particle Physics and Cosmology
  4. Univ. of Manchester (United Kingdom). School of Physics and Astronomy; Kennesaw State Univ., GA (United States). Dept. of Physics
  5. Michigan State Univ., East Lansing, MI (United States). Dept. of Physics and Astronomy
Publication Date:
Research Org.:
Southern Methodist Univ., Dallas, TX (United States); Michigan State Univ., East Lansing, MI (United States); Xinjiang Univ., Urumqi (China); Univ. of Manchester (United Kingdom)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); National Science Foundation (NSF); National Natural Science Foundation of China (NNSFC); Science and Technology Facilities Council (STFC) (United Kingdom)
OSTI Identifier:
1501923
Grant/Contract Number:  
SC0010129; PHY-1417326; 11465018; ST/L000520/1
Resource Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2018; Journal Issue: 2; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; QCD phenomenology; phenomenological models

Citation Formats

Hou, Tie-Jiun, Dulat, Sayipjamal, Gao, Jun, Guzzi, Marco, Huston, Joey, Nadolsky, Pavel, Schmidt, Carl, Winter, Jan, Xie, Keping, and Yuan, C. -P. CT14 intrinsic charm parton distribution functions from CTEQ-TEA global analysis. United States: N. p., 2018. Web. doi:10.1007/jhep02(2018)059.
Hou, Tie-Jiun, Dulat, Sayipjamal, Gao, Jun, Guzzi, Marco, Huston, Joey, Nadolsky, Pavel, Schmidt, Carl, Winter, Jan, Xie, Keping, & Yuan, C. -P. CT14 intrinsic charm parton distribution functions from CTEQ-TEA global analysis. United States. doi:10.1007/jhep02(2018)059.
Hou, Tie-Jiun, Dulat, Sayipjamal, Gao, Jun, Guzzi, Marco, Huston, Joey, Nadolsky, Pavel, Schmidt, Carl, Winter, Jan, Xie, Keping, and Yuan, C. -P. Fri . "CT14 intrinsic charm parton distribution functions from CTEQ-TEA global analysis". United States. doi:10.1007/jhep02(2018)059. https://www.osti.gov/servlets/purl/1501923.
@article{osti_1501923,
title = {CT14 intrinsic charm parton distribution functions from CTEQ-TEA global analysis},
author = {Hou, Tie-Jiun and Dulat, Sayipjamal and Gao, Jun and Guzzi, Marco and Huston, Joey and Nadolsky, Pavel and Schmidt, Carl and Winter, Jan and Xie, Keping and Yuan, C. -P.},
abstractNote = {We investigate the possibility of a (sizable) nonperturbative contribution to the charm parton distribution function (PDF) in a nucleon, theoretical issues arising in its interpretation, and its potential impact on LHC scattering processes. The “fitted charm” PDF obtained in various QCD analyses contains a process-dependent component that is partly traced to power-suppressed radiative contributions in DIS and is generally different at the LHC. We discuss separation of the universal component of the nonperturbative charm from the rest of the radiative contributions and estimate its magnitude in the CT14 global QCD analysis at the next-to-next-to leading order in the QCD coupling strength, including the latest experimental data from HERA and the Large Hadron Collider. Models for the nonperturbative charm PDF are examined as a function of the charm quark mass and other parameters. The prospects for testing these models in the associated production of a Z boson and a charm jet at the LHC are studied under realistic assumptions, including effects of the final-state parton showering.},
doi = {10.1007/jhep02(2018)059},
journal = {Journal of High Energy Physics (Online)},
number = 2,
volume = 2018,
place = {United States},
year = {2018},
month = {2}
}

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