منابع مشابه
Perspectives in Polarized Leptoproduction ∗
We discuss specific observables that can be measured in deep inelastic leptoproduc-tion in the case of 1-particle inclusive measurements, namely azimuthal asymmetries and power-suppressed (higher twist) corrections. These quantities contain information on the intrinsic transverse momentum of partons, with close connection to the gluon dynamics in hadrons. The use of polarization in leptoproduct...
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We study leptoproduction of J= at large Q2 within the nonrelativistic QCD (NRQCD) factorization formalism. The cross section is dominated by color-octet terms that are of order s. The color-singlet term, which is of order 2s , is shown to be a small contribution to the total cross section. We also calculate the tree diagrams for color-octet production at order 2s in a region of phase space wher...
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We calculate the energy–momentum distribution of the charmed quarks produced in neutrino reactions on protons, quantifying the importance of mass and current non– conservation effects. We study the strange and charm distributions probed in neutrino interactions in the presently accessible kinematical region. Some ambiguities inherent to the extraction of the parton densities from dimuon data ar...
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Hard exclusive leptoproductions of real photons, lepton pairs and mesons are the most promising tools to unravel the three-dimensional picture of the nucleon, which cannot be deduced from conventional inclusive processes like deeply inelastic scattering. Brief summary of talks given at 17th Summer School HUGS@CEBAF (Jefferson Lab, June 2002) Workshop “Exclusive processes at high momentum transf...
متن کاملTime-reversal odd distribution functions in leptoproduction
In this paper we study the effects of the possible presence of time-reversal ~T! odd distribution functions in leptoproduction. We limit ourselves to the production of hadrons in the current fragmentation region, for which we assume that the cross section factorizes into a product of a distribution function and a fragmentation function. Including the effects of transverse momenta, the cross sec...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 1998
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.57.1846