Heavy-quarkonium hadron cross section inQCDat leading twist
نویسندگان
چکیده
منابع مشابه
Heavy Quarkonium Dissociation Cross Sections in Relativistic Heavy-Ion Collisions
Many of the hadron-hadron cross sections required for the study of the dynamics of matter produced in relativistic heavy-ion collisions can be calculated using the quark-interchange model. Here we evaluate the low-energy dissociation cross sections of J/ψ, ψ′, χ, Υ, and Υ′ in collision with π, ρ, and K, which are important for the interpretation of heavy-quarkonium suppression as a signature fo...
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The factorization formalism of nonrelativistic quantum chromodynamics (NRQCD) provides a rigorous theoretical framework for the description of heavy-quarkonium production and decay that is renormalizable and predictive.1 Theoretical predictions are decomposed into sums over products of short-distance coefficients, which can be calculated perturbatively as expansions in the strong-coupling const...
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We study the hard color dipole-nucleon cross section within perturbative QCD and discuss its relation to observables in diffractive leptoproduction of heavy quarkonium. The dipole cross section calculated with the unintegrated gluon density of the nucleon substantially differs from the well-known perturbative form σdip ∼ b 2 for b > 0.3fm, where b is the transverse separation of the dipole. We ...
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The next-to-leading order three-jet cross section in hadron collisions is calculated in the simplified case when the matrix elements of all QCD subprocesses are approximated by the pure gluon matrix element. The longitudinallyinvariant k⊥ jet-clustering algorithm is used. The important property of reduced renormalization and factorization scale dependence of the next-toleading order physical cr...
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I review heavy quarkonium physics in view of recent experimental results. In particular, I discuss new results on spin singlet states, photon and hadronic transitions, D−states and discovery of yet unexplained narrow X(3872) state. 1 Quarkonia Quarkonium is a bound state of a quark and its anti-quark. Some properties of light and heavy quarkonia are compared to properties of positronium in Tabl...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2001
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.65.014005