99 Interpreting virtual photon interactions in terms of parton distribution functions 1
نویسندگان
چکیده
Interactions of virtual photons are analyzed in terms of photon structure. It is argued that the concept of parton distribution functions is phenomeno-logically very useful even for highly virtual photons involved in hard collisions. The role of longitudinal photons for proper interpretation of jet cross–sections in the region of moderate virtualities accessible at HERA is investigated.
منابع مشابه
PRA-HEP 99-07 Interpreting virtual photon interactions in terms of parton distribution functions
Interactions of virtual photons are analyzed in terms of photon structure. It is argued that the concept of parton distribution functions is phenomenologically very useful even for highly virtual photons involved in hard collisions. This claim is illustrated on leading order expressions for F γ 2 (x, P 2, Q2) and effective parton distribution function Deff(x, P 2, Q2) relevant for jet productio...
متن کامل51 4 v 1 2 7 D ec 1 99 9 PRA - HEP 99 - 07 Interpreting virtual photon interactions in terms of parton distribution functions
Interactions of virtual photons are analyzed in terms of photon structure. It is argued that the concept of parton distribution functions is phenomenologically very useful even for highly virtual photons involved in hard collisions. This claim is illustrated on leading order expressions for F γ 2 (x, P 2 , Q 2) and effective parton distribution function D eff (x, P 2 , Q 2) relevant for jet pro...
متن کاملInterpreting virtual photon interactions in terms of parton distribution functions
Interactions of virtual photons are analyzed in terms of photon structure. It is argued that the concept of parton distribution functions is phenomenologically very useful even for highly virtual photons involved in hard collisions. The role of longitudinal photons for proper interpretation of jet cross–section in the region of moderate virtualities accessible at HERA is investigated.
متن کامل2 00 7 Illuminating the 1 / x moment of parton distribution functions
The Weisberger relation, an exact statement of the parton model, elegantly relates a high-energy physics observable, the 1/x moment of parton distribution functions, to a nonperturbative low-energy observable: the dependence of the nucleon mass on the value of the quark mass or its corresponding quark condensate. We show that contemporary fits to nucleon structure functions fail to determine th...
متن کاملDeeply Virtual Compton Scattering at H1 and Zeus
The study of exclusive final states in electron-proton diffractive interactions is a very powerful tool to investigate the applicability and the relevance of perturbative Quantum Chromo Dynamics (QCD) in this field. At HERA, the wide kinematic range in the photon virtuality, Q, provides particular insight into the interplay between perturbative and non-perturbative regimes in QCD. Moreover, a c...
متن کامل