Heavy quarkonium production through the top quark rare decays via the channels involving flavor changing neutral currents

被引：2
作者：
Niu, Juan-Juan [1 ]
Guo, Lei [1 ]
Ma, Hong-Hao [2 ]
Wang, Shao-Ming [1 ]
机构：
[1] Chongqing Univ, Dept Phys, Chongqing 401331, Peoples R China
[2] Univ Estadual Paulista, Fac Engn Guaratingueta, BR-12516410 Guaratingueta, SP, Brazil
来源：
EUROPEAN PHYSICAL JOURNAL C | 2018年 / 78卷 / 08期
基金：
中国国家自然科学基金;
关键词：
HADRONIC PRODUCTION; CHARMONIUM; TEV; UNCERTAINTIES; COUPLINGS; MESONS; B(C);
D O I：
10.1140/epjc/s10052-018-6126-0
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
In the paper, we discuss the possibility of observation of heavy quarkoniums via the processes involving flavor changing neutral currents (FCNC). More explicitly, we systematically calculate the production of heavy charmonium and (c (b) over bar -quarkonium through the top quark semiexclusive rare FCNC decays in the framework of the nonrelativistic QCD (NRQCD) factorization theory. Our results show that the total decay widths Gamma(t -> eta c) = 1.20(-0.51-0.45) (+1.04+1.14) x 10(-16) GeV, Gamma(t -> J/psi)=1.37(-0.51-.051)(+1.03+1.30)x 10(-16) GeV, Gamma(t -> Bc) = 2.06(-0.17-0.54)(+0.17+0.91) x 10(-18) GeV, and Gamma(t -> Bc*) = 6.27(-0.62-1.64)(+0.63+2.78)x 10(-18) GeV, where the uncertainties are from variation of quark masses and renormalization scales. Even though the decay widths are small, it is important to make a systematic study on the production of charmonium and (cb)-quarkonium through the top-quark decays via FCNC in the Standard Model, which will provide useful guidance for future new physics research from the heavy quarkonium involved processes.
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页数：9
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