Parton distribution function for quarks in ans-channel approach
نویسندگان
چکیده
منابع مشابه
Parton distribution function for quarks in an s-channel approach
We use an s-channel picture of hard hadronic collisions to investigate the parton distribution function for quarks at small momentum fraction x, which corresponds to very high energy scattering. We study the renormalized quark distribution at one loop in this approach. In the high-energy picture, the quark distribution function is expressed in terms of a Wilson-line correlator that represents t...
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We compare parton densities for heavy quarks. Reactions with incoming heavy (c,b) quarks are often calculated with heavy quark densities just like those with incoming light mass (u,d,s) quarks are calculated with light quark densities. The heavy quark densities are derived within the framework of the so-called zero-mass variable flavor number scheme (ZM-VFNS). In this scheme these quarks are de...
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We explore the perturbative QCD corrections to the inclusive semileptonic decays of B mesons. In inclusive B decay processes the parton picture works well and the scaling feature manifests because the mass of b quark is larger than the QCD scale. Due to this property, the decay rate may be expressed by a single structure function describing the light–cone distribution of b quark apart from the ...
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Brookhaven National Laboratory, Upton, New York 11772-5000, USA Physics Division, Argonne National Laboratory, Argonne, Illinois 60439-4843, USA Department of Physics, University of Illinois, Urbana, Illinois 61801-3080, USA Physikalisches Institut, Universität Erlangen-Nürnberg, 91058 Erlangen, Germany Department of Theoretical Physics, University of the Basque Country UPV/EHU, 48080 Bilbao, S...
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It has been suggested that parton distributions in coordinate space, so called Ioffe-time distributions, provide a more natural object for non-perturbative methods compared to the usual momentum distributions. In this paper we argue that the shape of experimentally determined Ioffe-time distributions of quarks in a nucleon target clearly indicates separation of longitudinal scales, which is not...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2007
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.75.074020