Energy dependent growth of nucleon and inclusive charged hadron distributions

Transverse-Momentum-Dependent Gluon Distributions and Semi-inclusive Processes at Hadron Colliders

Abstract We study transverse-momentum-dependent (TMD) gluon distributions and factorization theorems for the gluon-initiated semi-inclusive processes at hadron colliders. Gauge-invariant TMD gluon distributions are defined, and their relations to the integrated (Feynman) parton distributions are explored when the transverse momentum is large. Through explicit calculations, soft-collinear factor...

Nucleon Momentum Distributions from a Modified Scaling Analysis of Inclusive

Inclusive electron scattering from nuclei at low momentum transfer (corresponding to x ≥ 1) and moderate Q is dominated by quasifree scattering from nucleons. In the impulse approximation, the cross section can be directly connected to the nucleon momentum distribution via the scaling function F (y). The breakdown of the y-scaling assumptions in certain kinematic regions have prevented extracti...

Energy and System Size Dependence of Charged Hadron

The PHOBOS collaboration has measured transverse momentum distributions of charged hadrons produced in Cu+Cu collisions at √ s NN = 200 and 62.4 GeV. The nuclear modification factor R N part AA is calculated relative to p+p data at both collision energies as a function of collision centrality. For the same number of participating nucleons, R N part AA is essentially the same in both systems ove...

An approximation for NLO single Higgs boson inclusive transverse momentum distributions in hadron-hadron collisions

In the framework of the gluon-gluon fusion process for Higgs boson production there are two different prescriptions. They are given by the exact process where the gluons couple via top-quark loops to the Higgs boson and by the approximation where the top-quark mass mt is taken to infinity. In the latter case the coupling of the gluons to the Higgs boson is described by an effective Lagrangian. ...

Inclusive Lepton-hadron Experiments