http://vitayard.in
Open Science and Research Project
OKFN, India
Intrinsic Charm Parton
Distribution Functions
from CTEQ-TEA
Global Analysis
Sayipjamal Dulat, Tie-Jiun Hou, Jun Gao, Joey
Huston, Jon Pumplin, Carl Schmidt, Daniel
Stump, C.-P. Yuan
Description:
We study the possibility of intrinsic (nonperturbative) charm in parton distribution
functions (PDF) of the proton, within the context
of the CT10 next-to-next-to-leading order
(NNLO) global analysis. Three models for the
intrinsic charm (IC) quark content are compared:
(i) $\hat{c}(x) = 0$ (zero-IC model); (ii) $\hat{c}
(x)$ is parametrized by a valence-like parton
distribution (BHPS model); (iii) $\hat{c}(x)$ is
parametrized by a sea-like parton distribution
(SEA model). In these models, the intrinsic charm
content, $\hat{c}(x)$, is included in the charm
PDF at the matching scale $Q_c=m_c=1.3$ GeV.
The best fits to data are constructed and compared.
Correlations between the value of $m_c$ and the
amount of IC are also considered.
Cite as: arXiv:1309.0025 [hep-ph] (or
arXiv:1309.0025v1 [hep-ph] for this version)
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