Global QCD analysis of parton structure of the nucleon: CTEQ5 parton distributions

Abstract

An up-to-date global QCD analysis of high energy lepton-hadron and hadronhadron interactions is performed to better determine the gluon and quark parton distributions in the nucleon. Improved experimental data on inclusive jet production, in conjunction with precise deep inelastic scattering data, place good constraints on the gluon over a wide range of x; while new data on asymmetries in Drell-Yan processes contribute to better determine the d/u ratio. Comparisons with results of other recent global analyses are made, and the differences are described. Open issues and the general problem of determining the uncertainties of parton distributions are discussed.

Jet-like correlations between forward- and mid- rapidity in p+p, d+Au and Au+Au collisions from STAR at

“…Such measurements at mid-rapidity mainly probe the energy loss of gluons, due to the dominance of gluon-gluon scattering at RHIC energies [2]. STAR has the unique capability to extend two particle correlation measurements to forward rapidities (2.7 < |η| < 3.9) by utilizing the Forward Time Projection Chambers (FTPC) [3], with trigger particles at mid-rapidity (|η| < 1) in the STAR-TPC [4].…”

Measurement of WW + WZ production cross section and study of the dijet mass spectrum in the ℓν + jets final state at CDF

“…B.1) are determined by fitting several different experimental results [72]. There are uncertainties associated with this fit, which are provided by the CTEQ Collaboration in the form of alternate PDF sets.…”

High density QCD through eletromagnetic probes

“…We will consider typical values for mass and x F . The projectile structure function employed was the LO GRV98 parametrization [21] to the GM predictions and CTEQ5L [22] for the saturation model ones.…”