Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-02-26
JHEP0704:089,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
19 pages; revised version submitted to JHEP
Scientific paper
10.1088/1126-6708/2007/04/089
The strangeness degrees of freedom in the parton structure of the nucleon are explored in the global analysis framework, using the new CTEQ6.5 implementation of the general mass perturbative QCD formalism of Collins. We systematically determine the constraining power of available hard scattering experimental data on the magnitude and shape of the strange quark and anti-quark parton distributions. We find that current data favor a distinct shape of the strange sea compared to the isoscalar non-strange sea. A new reference parton distribution set, CTEQ6.5S0, and representative sets spanning the allowed ranges of magnitude and shape of the strange distributions, are presented. Some applications to physical processes of current interest in hadron collider phenomenology are discussed.
Lai Hung-Liang
Nadolsky Pavel
Pumplin Jon
Stump Daniel
Tung W.-K.
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