منابع مشابه
State Photoproduction
It is shown that the list of unusual mesons planned for a careful study in photoproduction can be extended by the exotic states X(1600) with I(J) = 2(2) which should be looked for in the ρρ decay channels in the reactions γN → ρρN and γN → ρρ∆. The full classification of the ρρ states by their quantum numbers is presented. A simple model for the spin structure of the γp → f2(1270)p, γp → a2(132...
متن کاملJet photoproduction at HERA
We compute various kinematical distributions for one-jet and two-jet inclusive photoproduction at HERA. Our results are accurate to next-to-leading order in QCD. We use the subtraction method for the cancellation of infrared singularities. We perform a thorough study of the reliability of QCD predictions; in particular, we consider the scale dependence of our results and discuss the cases when ...
متن کاملHigh Energy Photoproduction
The study of photoproduction reactions has gained a unique opportunity with the HERA data. The high center of mass energy allows to carry out quantitative tests of QCD, to explore the substructure of both the photon and the proton and to shed new light on soft and diffractive processes. In this report we review the HERA results, comparing them with the reach of fixed target photoproduction expe...
متن کاملPhotoproduction of H C
Using the NRQCD factorization formalism, we calculate the total cross section for the photoproduction of hc mesons. We include color-octet and color-singlet mechanisms as well as next-to-leading order perturbative QCD corrections. The theoretical prediction depends on two nonperturbative matrix elements that are not well determined from existing data on charmonium production. For reasonable val...
متن کاملCharm Photoproduction via Fragmentation
The next-to-leading open charm production in γp collisions is calculated within the Perturbative Fragmentation Functions formalism, to allow resummation of αs log(p 2 T /m 2) terms. In the large pT region (pT > m) the result is consistent with the fixed order NLO calculation, small discrepancies being found for very large pT and at the edge of phase space. The two approaches differ in the defin...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2004
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.69.014015