D meson enhancement in pp collisions at the LHC due to nonlinear gluon evolution
| Autor: | Kari J. Eskola, R. Vogt, V.J. Kolhinen, Andrea Dainese, M. Bondila |
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| Jazyk: | angličtina |
| Rok vydání: | 2004 |
| Předmět: |
Physics
Nuclear and High Energy Physics Particle physics Large Hadron Collider Proton Meson Nuclear Theory High Energy Physics::Phenomenology FOS: Physical sciences HERA Gluon Hadronization Momentum Nuclear Theory (nucl-th) High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) D meson High Energy Physics::Experiment Nuclear Experiment |
| Popis: | 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^-��^+ decay channel with the ALICE detector. 15 pages, 4 figures, final version accepted by J. Phys. G |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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