Puzzles of production off nuclei
نویسندگان
چکیده
منابع مشابه
Breaking of k⊥-factorization for Single Jet Production off Nuclei
The linear k⊥-factorization is part and parcel of the pQCD description of high energy hard processes off free nucleons. In the case of heavy nuclear targets the very concept of nuclear parton density becomes ill-defined as exemplified by the recent derivation [2] of nonlinear nuclear k⊥-factorization for forward dijet production in DIS off nuclei. Here we report a derivation of the related brea...
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Nuclear suppression of charmonium production in proton-nucleus interactions is poorly understood, what restrains our attempts to single out unusual effects in heavy ion collisions. We develop a phenomenological approach, based on the lightcone dynamics of charmonium production, which has much in common with deepinelastic scattering and Drell-Yan lepton pair production. The key observation is th...
متن کاملGluon Shadowing in Heavy Flavor Production off Nuclei
Gluon shadowing which is the main source of nuclear effects for production of heavy flavored hadrons, remains unknown. We develop a light-cone dipole approach aiming at simplifying the calculations of nuclear shadowing for heavy flavor production, as well as the cross section which does not need next-to-leading and higher order corrections. A substantial process dependence of gluon shadowing is...
متن کاملCharmonium Production off Nuclei: from SPS to RHIC
The physics of charmonium suppression in nuclear collisions drastically changes between the energies of SPS and RHIC. Mechanisms suppressing charmonia at the SPS are reviewed, neither of which is important at RHIC. On the other hand, coherence, or shadowing of c quarks and gluons barely seen at SPS, becomes a dominant effect at RHIC providing a much stronger suppression. The onset of coherence ...
متن کاملPHOTOPRODUCTION OFF NUCLEI Part II: Particle and Jet Production
High energy multiparticle photoproduction off nuclear targets is studied. The photon is assumed to interact in direct scattering processes or as a resolved qq̄-state according to the Generalized Vector Dominance Model. In the description of resolved interactions multiple soft and hard processes in each qq̄–nucleon interaction are taken into consideration. The model, formulated within the framewor...
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ژورنال
عنوان ژورنال: Nuclear Physics A
سال: 2011
ISSN: 0375-9474
DOI: 10.1016/j.nuclphysa.2010.08.015