Header

UZH-Logo

Maintenance Infos

Simplified models of vector SU(4) leptoquarks at the TeV


Barbieri, Riccardo; Cornella, Claudia; Isidori, Gino (2022). Simplified models of vector SU(4) leptoquarks at the TeV. European Physical Journal C - Particles and Fields, 82(12):1161.

Abstract

Assuming confirmation of the anomalies in semi-leptonic B-decays, their explanation in terms of the exchange of a massive vector leptoquark field, Uaμ, of charge 2/3, appears to require the inclusion of Uaμ in the vector multiplet of the adjoint of Pati–Salam SU(4), GAμ, as well as the introduction of vector-like fermions, Fj, in the fundamental of SU(4). We consider simplified models characterised by the nature of the SU(4) symmetry (global or local), by the number of vector-like fermions, and by the couplings of the Higgs boson to SM fermions (direct or induced by mixing with the vector-like fermions). In all cases, we implement a minimal breaking of a U(2)nf flavour symmetry, with a single motivated exception. We then perform a global fit including the main observables sensitive to exchanges of the GAμ at tree level and in loops dominated by logs insensitive to the UV completion.

Abstract

Assuming confirmation of the anomalies in semi-leptonic B-decays, their explanation in terms of the exchange of a massive vector leptoquark field, Uaμ, of charge 2/3, appears to require the inclusion of Uaμ in the vector multiplet of the adjoint of Pati–Salam SU(4), GAμ, as well as the introduction of vector-like fermions, Fj, in the fundamental of SU(4). We consider simplified models characterised by the nature of the SU(4) symmetry (global or local), by the number of vector-like fermions, and by the couplings of the Higgs boson to SM fermions (direct or induced by mixing with the vector-like fermions). In all cases, we implement a minimal breaking of a U(2)nf flavour symmetry, with a single motivated exception. We then perform a global fit including the main observables sensitive to exchanges of the GAμ at tree level and in loops dominated by logs insensitive to the UV completion.

Statistics

Citations

Dimensions.ai Metrics
3 citations in Web of Science®
3 citations in Scopus®
Google Scholar™

Altmetrics

Downloads

4 downloads since deposited on 14 Feb 2023
4 downloads since 12 months
Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Scopus Subject Areas:Physical Sciences > Engineering (miscellaneous)
Physical Sciences > Physics and Astronomy (miscellaneous)
Uncontrolled Keywords:Physics and Astronomy (miscellaneous), Engineering (miscellaneous)
Language:English
Date:22 December 2022
Deposited On:14 Feb 2023 12:06
Last Modified:30 Nov 2023 02:45
Publisher:Springer
ISSN:1434-6044
OA Status:Gold
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1140/epjc/s10052-022-11086-2
  • Content: Published Version
  • Language: English
  • Licence: Creative Commons: Attribution 4.0 International (CC BY 4.0)