Gauge leptoquark as the origin of B-physics anomalies.

By L. Luzio, Admir Greljo, Marco Nardecchia. 2017

282 citations recorded by the source corpus.

The vector leptoquark representation, Uμ ¼ ð3; 1; 2=3Þ, was recently identified as an exceptional single mediator model to address experimental hints on lepton flavor universality violation in semileptonic B-meson decays, both in neutral (b → sμμ) and charged (b → cτν) current processes. Nonetheless, it is well known that massive vectors crave an ultraviolet (UV) completion. We present the first full-fledged UV complete and calculable gauge model which incorporates this scenario while remaining in agreement with all other indirect flavor and electroweak precision measurements, as well as, direct searches at high-pT . The model is based on a new non-Abelian gauge group spontaneously broken at the TeV scale, and a specific flavor structure suppressing flavour violation in ΔF ¼ 2 processes while inducing sizeable semileptonic transitions

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/9fa8d47b83643d355460035dac1f6842a9773d75

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Citations in the corpus

Review of lepton universality tests in B decays (2018, background): “Stringent bounds coming from light-quark processes require different couplings of the leptoquark to the different generations, leading to the introduction of a Pati-Salam gauge group for each of the three generations [207,224–228].”
B-decay discrepancies after Moriond 2019 (2019, methodology): “Explaining the data by a single mediator: the U1 leptoquark solution The only single mediator that can yield non-zero values for [C (1) lq ]3323 = [C (3) lq ]3323 and [C (1) lq ]2223 = [C (3) lq ]2223 is the U1 vector leptoquark [35,37,38,40,81–92], which transforms as (3,1)2/3 under the SM gauge gr”
Opportunities in Flavour Physics at the HL-LHC and HE-LHC (2018, background): “pT than the leptoquarks, which is particularly true for vector leptoquark extensions (see for example [963, 1491])”
Revisiting the vector leptoquark explanation of the B-physics anomalies (2019, methodology): “s, we end up with two real color octects, two real and one complex singlets, and two complex leptoquarks. The vector-boson spectrum after SSB, which coincides with the one originally proposed in Ref. [28], contains the following massive elds U1;2;3 = 1 p 2 H9;11;13 iH 10;12;14 ; Z0 = 1 q g 2 4 + ”
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].”
Baryon number and lepton universality violation in leptoquark and diquark models (2017, methodology): “peared proposing the explanation of B decay anomalies by introducing new vector-like fields either within the Pati-Salam framework [90] or in a model with an extended gauge group [91].”
Maximal flavour violation: a Cabibbo mechanism for leptoquarks (2018, background): “In this section we summarise the main features of the 4321 model presented in [37] (see also [60]).”