Uncertainties in estimating the indirect production of Bc and its excited states via top quark decays at CERN LHC
Uncertainties in estimating the indirect production of Bc and its excited states via top quark decays at CERN LHC
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估计 CERN LHC 顶夸克衰变间接产生 Bc 及其激发态的不确定性
DOI:
10.1016/j.physletb.2008.12.015
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发表时间:
2008-05
影响因子:
4.4
通讯作者:
Wu, Xing-Gang
中科院分区:
文献类型:
--
作者:
Wu, Xing-Gang
Main theoretical uncertainties in estimating the indirect production of (bc¯)-quarkonium (Bc−meson and its excited states) via top quark decays, t→(bc¯)+c+W+, are studied within the non-relativistic QCD framework. It is found that the dimensionless reduced decay width for a particular (bc¯)-quarkonium state, [Formula: see text] , is very sensitive to the c-quark mass, while the uncertainties from the b-quark and t-quark masses are small, where n stands for the eight (bc¯)-quarkonium states up to O(v4): |(bc¯)(S01)1〉, |(bc¯)(S13)1〉, |(bc¯)(P11)1〉, |(bc¯)(PJ3)1〉 (with J=(1,2,3)), |(bc¯)(S01)8g〉 and |(bc¯)(S13)8g〉 respectively. About 108tt¯-pairs shall be produced per year at CERN LHC, if adopting the assumption that all the higher Fock states decay to the ground state with 100% probability, then we shall have (1.038−0.782+1.353)×105Bc−events per year. So the indirect production provides another important way to study the properties of Bc−meson in comparison to that of the direct hadronic production at CERN LHC.
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DOI:
10.1016/b978-0-444-89316-1.50015-5
发表时间:
1992
期刊:
Current Physics–Sources and Comments
影响因子:
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作者:
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DOI:
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2006-04
期刊:
Comput. Phys. Commun.
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作者:
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影响因子:
5
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