2015/06/23 by Qi-Li Liao, Yan Yu, Liao, Qi-Li +7
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph
paper · pdf · doi:10.48550/arxiv.1506.07045
11 pages, 12 figures. arXiv admin note: text overlap with arXiv:1505.03275, arXiv:1408.5563; text overlap with arXiv:0711.1898 by other authors
arxiv created 2018/01/24 · arxiv updated 2018/01/25
In this work we evaluate the masses of the |(bs)[n]⟩ or |(bs)[n]⟩ quarkonium (B0s or B0s meson) under the B.T. potential, and the values of the Schr\rm odinger radial wave function at the origin of the |(bs)[n]⟩ or |(bs)[n]⟩ quarkonium within the five potential models. Then we investigate a systematic study on the production of the |(bs)[n]⟩ or |(bs)[n]⟩ quarkonium via top quark or antitop quark decays in the color-singlet QCD factorization formula (CSQCDFF), i.e., the two S-wave states, |(bs)[11S0] ⟩ (or |(bs)[11S0] ⟩) and |(bs)[13S1] ⟩ (or |(bs)[13S1] ⟩), and its four P-wave excited states, |(bs)[11P1] ⟩ (or |(bs)[11P1] ⟩) and |(bs)[13PJ] ⟩ (or |(bs)[13PJ] ⟩) (with J =[0, 1, 2]). For deriving compact analytical results for complex processes, the "improved trace technology" is adopted to deal with the decay channels at the amplitudes. Moreover, various differential distributions and uncertainties of the concerned processes are analyzed carefully. By adding the uncertainties caused by the b and s-quark masses in quadrature, we obtain Γ(t→ |(bs)[n]⟩ +W+s)=14.19+4.36-3.20~MeV. At the LHC with the luminosity \cal L∝ 1034cm-2s-1 and the center-of-mass energy √(S)=14 TeV, sizable |(bs)[n]⟩ or |(bs)[n]⟩ meson events can be produced through t-quark or t-quark decays; i.e., about 1.3~×106 B0s or B0s events per year can be obtained.