Journal
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
Volume 30, Issue 12, Pages 1787-1799Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0954-3899/30/12/002
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When nonlinear effects on the gluon evolution are included with constraints from HERA, the gluon distribution in the free proton is enhanced at low momentum fractions, x less than or similar to 0.01, and low scales, O-2 less than or similar to 10 GeV2, relative to standard, DGLAP-evolved, gluon distributions. Consequently, such gluon distributions can enhance charm production in pp collisions at centre-of-mass energy 14 TeV by up to a factor of 5 at midrapidity, y similar to 0, and transverse momentum p(T) --> 0 in the most optimistic case. We show that most of this enhancement survives hadronization into D mesons. Assuming the same enhancement at leading and next-to-leading order, we show that the D enhancement may be measured by D-0 reconstruction in the K(-)pi(+) decay channel with the ALICE detector.
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