Soft and hard processes in QCD
نویسندگان
چکیده
منابع مشابه
Soft and Hard Qcd *
I review various theoretical questions that arise from data from HERA and the Tevatron, and which are relevant for the LHC. They range from soft physics, such as the total cross section, to hard physics, such as Higgs production. In particular, I argue that the proton's gluon density is somewhat larger at small x than is currently accepted.
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Multiplicity of sets of soft jets with energies ranging in some interval is determined. The possible role of collective effects is discussed. The phenomenon of jet emission is well known in QCD and firmly established in experiment. The two-jet events in e + e −-annihilation provide us with unique possibility to measure jets with fixed energy equal to that of colliding particles. In all other ca...
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Exclusive and semi-exclusive processes, the diffractive dissociation of hadrons into jets, and hard diffractive processes such as vector meson leptoproduction provide new testing grounds for QCD and essential information on the structure of light-cone wavefunctions of hadrons, particularly the pion distribution amplitude. I review the basic features of the leading-twist QCD predictions and the ...
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We calculate the A-dependence of open charm and beauty as well as DrellYan pair production cross sections on nuclear targets taking into account the difference of quark and gluon distributions in free and bound nucleons. The results are presented for both proton-nucleus and nucleus-nucleus collisions. For the case of heavy flavour production at comparatively low energies, if σ ∼ Aα, the values ...
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ژورنال
عنوان ژورنال: Journal of Experimental and Theoretical Physics Letters
سال: 2005
ISSN: 0021-3640,1090-6487
DOI: 10.1134/1.1944068