Impact of Λb → Λcιν measurement on new physics in b → clν transitions

doi:10.1103/PhysRevD.107.055005

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	Impact of Λb → Λcιν measurement on new physics in b → clν transitions
	Fedele, Marco ; Blanke, Monika 1; Crivellin, Andreas 2,3; Iguro, Syuhei 1,2; Kitahara, Teppei 4,5,6,7; Nierste, Ulrich ; Watanabe, Ryoutaro 8
刊名	PHYSICAL REVIEW D
	2023
卷号	107 期号:5 页码:55005
关键词	LEPTON UNIVERSALITY VIOLATION MODEL LEPTOQUARKS (B)OVER-BAR
ISSN号	2470-0010
DOI	10.1103/PhysRevD.107.055005
英文摘要	Measurements of the branching ratios of B -> D-()iota(nu) over bar vertical bar B -> D(())l (nu) over bar B-c -> J vertical bar psi iota(nu) over bar vertical bar B-c -> J vertical bar psi l (nu) over bar the BABAR, Belle and LHCb collaborations consistently point towards an abundance of taus compared to channels with light leptons. However, the ratio Lambda(b) -> Lambda(c)iota(nu)over bar / Lambda(b) -> Lambda(c)l(nu)over bar shows a relative deficit in taus. In this paper, we critically address whether data still points towards a coherent pattern of deviations, in particular in light of the sum rule relating these decays in a model-independent way. We find that no common new physics explanation of all ratios is possible (within 2 sigma or 1.5 sigma, depending on the R(Lambda(c)) normalization to light lepton channels). While this inconsistency could be a statistical fluctuation, further measurements are required in order to converge to a coherent pattern of experimental results.
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/311006/28002]
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.Karlsruhe Inst Technol, Inst Theoret Teilchenphys TTP, D-76131 Karlsruhe, Germany 2.Karlsruhe Inst Technol, Inst Astroteilchenphys IAP, D-76344 Eggenstein Leopoldshafen, Germany 3.Paul Scherrer Inst, CH-5232 Villigen, Switzerland 4.Univ Zurich, Phys Inst, Winterthurerstr 190, CH-8057 Zurich, Switzerland 5.Nagoya Univ, Inst Adv Res, Nagoya 4648602, Japan 6.Nagoya Univ, Kobayashi Maskawa Inst Origin Particles & Universe, Nagoya 4648602, Japan 7.KEK Theory Ctr, IPNS, KEK, Tsukuba 3050801, Japan 8.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 9.INFN, Sez Pisa, Largo B Pontecorvo 3, I-56127 Pisa, Italy
推荐引用方式 GB/T 7714	Fedele, Marco,Blanke, Monika,Crivellin, Andreas,et al. Impact of Λb → Λcιν measurement on new physics in b → clν transitions[J]. PHYSICAL REVIEW D,2023,107(5):55005.
APA	Fedele, Marco.,Blanke, Monika.,Crivellin, Andreas.,Iguro, Syuhei.,Kitahara, Teppei.,...&Watanabe, Ryoutaro.(2023).Impact of Λb → Λcιν measurement on new physics in b → clν transitions.PHYSICAL REVIEW D,107(5),55005.
MLA	Fedele, Marco,et al."Impact of Λb → Λcιν measurement on new physics in b → clν transitions".PHYSICAL REVIEW D 107.5(2023):55005.