Pair production of heavy quarkonium and B{sub c}{sup (*)} mesons at hadron colliders

Journal Article · Wed Jul 01 04:00:00 EDT 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.80.014020· OSTI ID:21308526

Rong, Li; Yujie, Zhang ^[1]; Kuangta, Chao ^[1]

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1. Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871 (China)

We investigate the pair production of S-wave heavy quarkonium at the LHC in the color-singlet mechanism (CSM) and estimate the contribution from the gluon fragmentation process in the color-octet mechanism (COM) for comparison. With the matrix elements extracted previously in the leading-order calculations, the numerical results show that the production rates are quite large for the pair production processes at the LHC. The p{sub t} distribution of double J/{psi} production in the CSM is dominant over that in the COM when p{sub t} is smaller than about 10 GeV. For the production of double {upsilon}, the contribution of the COM is always larger than that in the CSM. The large differences in the theoretical predictions between the CSM and COM for the p{sub t} distributions in the large p{sub t} region are useful in clarifying the effects of COM on the quarkonium production. We also investigate the pair production of S-wave B{sub c} and B{sub c}* mesons, and the measurement of these processes is useful to test the CSM and extract the long-distance matrix elements for the B{sub c} and B{sub c}* mesons. Aside from numerical calculations, analytical expressions for the production differential cross sections of all these processes are also given.

• OSTI ID: 21308526
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 1 Vol. 80; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CERN LHC
COLOR MODEL
COMPARATIVE EVALUATIONS
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
FORECASTING
FRAGMENTATION
GEV RANGE 01-10
GLUONS
J PSI-3097 MESONS
MATRIX ELEMENTS
PAIR PRODUCTION
S WAVES