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

Abstract

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 aremore » also given.« less

Authors:
;  [1];  [1]
  1. Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871 (China)
Publication Date:
OSTI Identifier:
21308526
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 80; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevD.80.014020; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Rong, Li, Yujie, Zhang, Kuangta, Chao, and Center for High Energy Physics, Peking University, Beijing 100871. Pair production of heavy quarkonium and B{sub c}{sup (*)} mesons at hadron colliders. United States: N. p., 2009. Web. doi:10.1103/PHYSREVD.80.014020.
Rong, Li, Yujie, Zhang, Kuangta, Chao, & Center for High Energy Physics, Peking University, Beijing 100871. Pair production of heavy quarkonium and B{sub c}{sup (*)} mesons at hadron colliders. United States. https://doi.org/10.1103/PHYSREVD.80.014020
Rong, Li, Yujie, Zhang, Kuangta, Chao, and Center for High Energy Physics, Peking University, Beijing 100871. Wed . "Pair production of heavy quarkonium and B{sub c}{sup (*)} mesons at hadron colliders". United States. https://doi.org/10.1103/PHYSREVD.80.014020.
@article{osti_21308526,
title = {Pair production of heavy quarkonium and B{sub c}{sup (*)} mesons at hadron colliders},
author = {Rong, Li and Yujie, Zhang and Kuangta, Chao and Center for High Energy Physics, Peking University, Beijing 100871},
abstractNote = {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.},
doi = {10.1103/PHYSREVD.80.014020},
url = {https://www.osti.gov/biblio/21308526}, journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 1,
volume = 80,
place = {United States},
year = {2009},
month = {7}
}