Prompt J/Psi production in the Regge limit of QCD: From the Tevatron to the LHC

Saleev, V.A.; Shipilova, A.V.; Nefedov, M.A.

doi:10.1103/PhysRevD.85.074013

Journal Article

PreJuSER-20641

Prompt J/Psi production in the Regge limit of QCD: From the Tevatron to the LHC

Saleev, V. A. ; Nefedov, M. A.FZJ* ; Shipilova, A. V.FZJ*

2012
Soc. [S.l.]

Physical review / D 85(7), 074013 (2012) [10.1103/PhysRevD.85.074013]

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Please use a persistent id in citations: http://hdl.handle.net/2128/10252 doi:10.1103/PhysRevD.85.074013

Abstract: We study prompt J/psi-meson hadroproduction invoking the hypothesis of gluon Reggeization in t-channel exchanges at high energy and the factorization formalism of nonrelativistic quantum chromodynamics at the leading order in the strong-coupling constant alpha(s) and the relative velocity of quarks upsilon. The transverse-momentum distribution of direct and prompt J/psi-meson production measured at the Fermilab Tevatron fitted to obtain the nonperturbative long-distance matrix elements, which are used to predict prompt J/psi production spectra at the CERN LHC. At the numerical calculation, we adopt the Kimber-Martin-Ryskin and Blumlein prescriptions to derive unintegrated gluon distribution function of the proton from their collinear counterpart, for which we use the Martin-Roberts-Stirling-Thorne set. Without adjusting any free parameters, we find good agreement with measurements by the ATLAS, CMS and LHCb Collaborations at the LHC at the hadronic c.m. energy root S = 7 TeV.

Keyword(s): J/psi(3100): hadroproduction ; gluon: Regge ; quantum chromodynamics: nonrelativistic ; gluon: distribution function ; transverse momentum: momentum spectrum ; CERN LHC Coll ; Batavia TEVATRON Coll ; p p: inclusive reaction ; anti-p p: annihilation ; J/psi(3100): direct production ; factorization ; numerical calculations ; 1800: 1960: 7000 GeV-cms

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Note: We are grateful to B. A. Kniehl, M. Butenschon, M. Buscher and N. N. Nikolaev for useful discussions. The work of M. A. N. and A. V. S. was supported by the Federal Ministry for Science and Education of the Russian Federation under Contract No. 14.740.11.0894 and in part by the Grant No. DFG 436 RUS 113/940; the work of V. A. S. was supported in part by the Russian Foundation for Basic Research under Grant No. 11-02-00769-a and by SFB of Hamburg University (SFB-676).; 13 pages, 10 figures, 1 table; 13 pages, 10 figures, 1 table

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