A challenge to lepton universality in B-meson decays

Ciezarek, Gregory; Franco Sevilla, Manuel; Hamilton, Brian; Kowalewski, Robert; Kuhr, Thomas; Lüth, Vera; Sato, Yutaro

doi:10.1038/nature22346

Title: A challenge to lepton universality in B-meson decays

Journal Article · Wed Jun 07 00:00:00 EDT 2017 · Nature (London)

DOI:https://doi.org/10.1038/nature22346· OSTI ID:1369396

Ciezarek, Gregory ^[1]; Franco Sevilla, Manuel ^[2]; Hamilton, Brian ^[3]; Kowalewski, Robert ^[4]; Kuhr, Thomas ^[5]; Lüth, Vera ^[6]; Sato, Yutaro ^[7]

Nikhef National Inst. for Subatomic Physics, Amsterdam (The Netherlands)
Univ. of California, Santa Barbara, CA (United States)
Univ. of Maryland, College Park, MD (United States)
Univ. of Victoria, BC (Canada)
Ludwig Maximilians Univ., Munich (Germany)
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Nagoya Univ. (Japan). Kobayashi-Maskawa Inst.

One of the key assumptions of the standard model of particle physics is that the interactions of the charged leptons, namely electrons, muons and taus, differ only because of their different masses. Whereas precision tests comparing processes involving electrons and muons have not revealed any definite violation of this assumption, recent studies of B-meson decays involving the higher-mass tau lepton have resulted in observations that challenge lepton universality at the level of four standard deviations. Here, a confirmation of these results would point to new particles or interactions, and could have profound implications for our understanding of particle physics.

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Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: USDOE; National Science Foundation (NSF); Japan Society for the Promotion of Science (JSPS); Natural Sciences and Engineering Research Council of Canada (NSERC); Organisation for Scientific Research (NWO)

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 1369396

Journal Information:: Nature (London), Vol. 546, Issue 7657; ISSN 0028-0836

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 32 works

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Probing the Effects of New Physics in ${\bar{B}}^{⁎} \to P l {\bar{ν}}_{l}$ Decays Chang, Qin; Zhu, Jie; Wang, Na Advances in High Energy Physics, Vol. 2018 https://doi.org/10.1155/2018/7231354	journal	September 2018
Analyzing lepton flavor universality in the decays $Λ_{b} \to Λ_{c}^{(*)} ({\frac{1}{2}}^{\pm}, {\frac{3}{2}}^{-}) + ℓ {\bar{ν}}_{ℓ}$ Gutsche, Thomas; Ivanov, Mikhail A.; Körner, Jürgen G. Physical Review D, Vol. 98, Issue 5 https://doi.org/10.1103/physrevd.98.053003	journal	September 2018
The Mu-MASS (muonium laser spectroscopy) experiment Crivelli, P. Hyperfine Interactions, Vol. 239, Issue 1 https://doi.org/10.1007/s10751-018-1525-z	journal	November 2018
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$R$ -parity violating solutions to the $R_{D^{(*)}}$ anomaly and their GUT-scale unifications Hu, Quan-Yi; Li, Xin-Qiang; Muramatsu, Yu Physical Review D, Vol. 99, Issue 1 https://doi.org/10.1103/physrevd.99.015008	journal	January 2019
Opportunities for Lattice QCD in quark and lepton flavor physics Lehner, Christoph; Meinel, Stefan; Blum, Tom The European Physical Journal A, Vol. 55, Issue 11 https://doi.org/10.1140/epja/i2019-12891-2	journal	November 2019
$${b\rightarrow c\tau \nu }$$ b → c τ ν transitions in the standard model effective field theory Hu, Quan-Yi; Li, Xin-Qiang; Yang, Ya-Dong The European Physical Journal C, Vol. 79, Issue 3 https://doi.org/10.1140/epjc/s10052-019-6766-8	journal	March 2019
B-decay anomalies and scalar leptoquarks in unified Pati-Salam models from noncommutative geometry Aydemir, Ufuk; Minic, Djordje; Sun, Chen Journal of High Energy Physics, Vol. 2018, Issue 9 https://doi.org/10.1007/jhep09(2018)117	journal	September 2018
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