Strange and heavy quark PDFs in the nucleon
Ingo Schienbein
Laboratoire de Physique Subatomique et de Cosmologie, Grenoble
Vendredi 28/06/2013, 11:00
Bat 709, salle 3 (salle Cassini, Rdc), CEA Saclay, Orme des Merisiers

ATTENTION: salle inhabituelle!!


Global analyses of Parton Distribution Functions (PDFs) have provided

incisive constraints on the up and down quark components of the proton,

but constraining the other flavor degrees of freedom is more challenging.

Higher-order theory predictions and new data sets have contributed

to recent improvements. Despite these efforts, the strange quark PDF

has a sizable uncertainty, particularly in the small x region.

We examine the constraints from experiment and theory, and investigate

the impact of this uncertainty on LHC observables. In particular,

we study W/Z production to see how the s-quark uncertainty propagates

to these observables, and examine the extent to which precise measurements

at the LHC can provide additional information on the proton flavor

structure. We then discuss the theoretical treatment of heavy quarks

in perturbative QCD and hence in global analyses. We discuss experimental

constraints on the charm quark PDF and propose ways how to find or

constrain a possible non-perturbative intrinsic charm/bottom distribution in the


Contact : Stephane PLATCHKOV


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