B-decay anomalies in a composite leptoquark model

By R. Barbieri, C. Murphy, Fabrizio Senia. The European Physical Journal C, 2016

227 citations recorded by the source corpus.

The collection of a few anomalies in semileptonic B-decays, especially in b→cτν¯\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$b\rightarrow c \tau \bar{\nu }$$\end{document}, invites to speculate about the emergence of some striking new phenomena, perhaps interpretable in terms of a weakly broken U(2)n\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$U(2)^n$$\end{document} flavor symmetry and of leptoquark mediators. Here we aim at a partial UV completion of this interpretation by generalizing the minimal composite Higgs model to include a composite vector leptoquark as well.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/6f7c28967bed1d0aa22e941d7ba04d1e47bf308b

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Citations in the corpus

Opportunities in Flavour Physics at the HL-LHC and HE-LHC (2018, background): “Both scalar and vector leptoquarks could arise, for example, in composite models [957, 958].”
B-decay discrepancies after Moriond 2019 (2019, methodology): “dent. We note that k s= k Y = 1 is automatically satised in any model in which the U 1 leptoquark stems from the spontaneous breaking of a gauge symmetry but can also be realized for a composite U 1 [98]. We perform the one-loop matching at the scale = M U by computing the diagrams shown in Fig.5. W”
Review of lepton universality tests in B decays (2018, methodology): “Related models have been proposed, based on partial compositeness and feature heavy vector-like quarks and leptoquarks [202,223,230–233].”
On the importance of electroweak corrections for B anomalies (2017, background): “Z ′ or leptoquarks, rely on a U(2) flavour breaking pattern [80, 81, 97].”
Vector boson fusion at multi-TeV muon colliders (2020, background): “While the spectrum of leptoquark models is vast, especially interesting options are those featuring vector leptoquarks due to their direct role in GUTs and recent demonstrations of their ultraviolet completions [140–143].”