D meson enhancement in pp collisions at the LHC due to nonlinear gluon evolution
arXiv:hep-ph/0403098 · doi:10.1088/0954-3899/30/12/002
Abstract
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 < 0.01, and low scales, Q^2 < 10 GeV^2, relative to standard, DGLAP-evolved, gluon distributions. Consequently, such gluon distributions can enhance charm production in pp collisions at center of mass energy 14 TeV by up to a factor of five at midrapidity, y \sim 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^-π^+ decay channel with the ALICE detector.
arXiv comment15 pages, 4 figures, final version accepted by J. Phys. G
References in corpus (12)
- New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
- High-Energy-Physics Event Generation with PYTHIA 6.1
- Global QCD Analysis of Parton Structure of the Nucleon: CTEQ5 Parton Distributions
- Deep-Inelastic Inclusive ep Scattering at Low x and a Determination of alpha_s
- MRST2001: partons and alpha_S from precise deep inelastic scattering and Tevatron jet data
- NNLO global parton analysis
- Scheme dependence, leading order and higher twist studies of MRST partons
- The A Dependence of Open Charm and Bottom Production
- Nonlinear corrections to the DGLAP equations in view of the HERA data
- What is the Real K Factor?
- Threshold Effects in Charm Hadroproduction
- Enhancement of charm quark production due to nonlinear corrections to the DGLAP equations