Model of vector leptoquarks in view of the B-physics anomalies

doi:10.1103/PhysRevD.98.115002

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	Model of vector leptoquarks in view of the B-physics anomalies
	Calibbi, L ; Crivellin, A 3; Li, TJ
刊名	PHYSICAL REVIEW D
	2018
卷号	98 期号:11 页码:115002
关键词	UNIVERSALITY VIOLATION R-K UNIFICATION DECAYS
ISSN号	2470-0010
DOI	10.1103/PhysRevD.98.115002
英文摘要	Lepton number as a fourth color is an intriguing theoretical idea which is combined with a possible left-right symmetry within the famous Pati-Salam (PS) model. In the conventional PS model, a spontaneous breaking of the PS gauge group down to the SM, one can only take place at very high scales (above the PeV scale) due to the stringent bounds from K-L -> mu e and K -> pi mu e induced by the resulting vector leptoquarks. In this paper, we show that these constraints can be avoided once additional vectorlike fermions are introduced and, thus, a breaking at the TeV scale is possible. We consider the flavor phenomenology of this model in the context of the intriguing hints for new physics in semileptonic B decays. The necessary violation of lepton flavor universality is induced by mixing SM and vectorlike fermions. Concerning R(D) and R(D), we find that sizable effects are possible while respecting the bounds from other flavor observables but predicting a large enhancement of B-s -> tau(+)tau(-) . Furthermore, also in b -> sl(+)l(-) transitions, the observed deviations from the SM predictions [including R(K) and R(K)] can be explained with natural values for the free parameters of the model without any fine-tuning, predicting sizable decay rates for b -> s tau mu. Finally, the anomaly in the anomalous magnetic moment of the muon can be accounted for by a loop contribution involving the vector leptoquark and vectorlike leptons.
学科主题	Astronomy & Astrophysics ; Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/22769]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Paul Scherrer Inst, CH-5232 Villigen, Switzerland 2.Univ Chinese Acad Sci, Sch Phys Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Theoret Phys, Key Lab Theoret Phys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Calibbi, L,Crivellin, A,Li, TJ. Model of vector leptoquarks in view of the B-physics anomalies[J]. PHYSICAL REVIEW D,2018,98(11):115002.
APA	Calibbi, L,Crivellin, A,&Li, TJ.(2018).Model of vector leptoquarks in view of the B-physics anomalies.PHYSICAL REVIEW D,98(11),115002.
MLA	Calibbi, L,et al."Model of vector leptoquarks in view of the B-physics anomalies".PHYSICAL REVIEW D 98.11(2018):115002.