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Title: Left-right SU(4) vector leptoquark model for flavor anomalies

Journal Article · · Physical Review. D.
 [1];  [1];  [1]
  1. Univ. of California, San Diego, La Jolla, CA (United States)
+ Show Author Affiliations

Building on our recent proposal to explain the experimental hints of new physics in B meson decays within the framework of Pati-Salam quark-lepton unification, through the interactions of the (3,1)2/3 vector leptoquark, we construct a realistic model of this type based on the gauge group SU(4)L × SU(4)R × SU(2)L × U(1)' and consistent with all experimental constraints. The key feature of the model is that SU(4)R is broken at a high scale, which suppresses right-handed lepton flavor changing currents at the low scale and evades the stringent bounds from searches for lepton flavor violation. The mass of the leptoquark can be as low as 10 TeV without the need to introduce mixing of quarks or leptons with new vectorlike fermions. We provide a comprehensive list of model-independent bounds from low energy processes on the couplings in the effective Hamiltonian that arises from generic leptoquark interactions, and then apply these to the model presented here. We discuss various meson decay channels that can be used to probe the model and we investigate the prospects for discovering the new gauge boson at future colliders.

Research Organization:
Univ. of California, San Diego, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC); USDOE
Grant/Contract Number:
SC0009919
OSTI ID:
1501706
Alternate ID(s):
OSTI ID: 1611237
Journal Information:
Physical Review. D., Vol. 99, Issue 5; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Test of lepton universality with B0 → K*0ℓ+ℓ− decays text January 2017
Review of Particle Physics text January 2008
A three-site gauge model for flavor hierarchies and flavor anomalies text January 2018
Importance of Loop Effects in Explaining the Accumulated Evidence for New Physics in B Decays with a Vector Leptoquark text January 2019
Review of Particle Physics text January 2018
B Meson Anomalies in a Pati-Salam Model within the Randall-Sundrum Background text January 2018
A unified leptoquark model confronted with lepton non-universality in B-meson decays text January 2018
Review of Particle Physics text January 2012
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Constraints on two-lepton, two quark operators text January 2010
MadGraph 5 : Going Beyond text January 2011
Simplified models with baryon number violation but no proton decay text January 2012
Phenomenology of scalar leptoquarks text January 2013
Interpreting Hints for Lepton Flavor Universality Violation text January 2017
Flavour anomalies after the $R_{K^*}$ measurement text January 2017
Gauge-invariant implications of the LHCb measurements on Lepton-Flavour Non-Universality text January 2017
$B$ Meson Anomalies in a Pati-Salam Model within the Randall-Sundrum Background text January 2018
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Addressing the B-physics anomalies in a fundamental Composite Higgs Model text January 2018
Importance of Loop Effects in Explaining the Accumulated Evidence for New Physics in B Decays with a Vector Leptoquark text January 2018
Detailed calculation of lepton flavor violating muon-electron conversion rate for various nuclei text January 2002
Gauge leptoquark as the origin of B-physics anomalies text January 2017
Baryon number and lepton universality violation in leptoquark and diquark models journal February 2018
A three-site gauge model for flavor hierarchies and flavor anomalies journal April 2018
On flavourful Easter eggs for New Physics hunger and lepton flavour universality violation journal October 2017
The Third type of Fermion Mixing in the Lepton and Quark Interactions with Leptoquarks journal April 2012
Third family hypercharge model for RK(∗) and aspects of the fermion mass problem text January 2018
On the model discriminating power of mu -> e conversion in nuclei text January 2009
Simplified models with baryon number violation but no proton decay text January 2012
Phenomenology of scalar leptoquarks text January 2013
A gauged horizontal $SU(2)$ symmetry and $R_{K^{(\ast)}}$ text January 2018
A unified leptoquark model confronted with lepton non-universality in $B$-meson decays text January 2018
Pati-Salam explanations of the B-meson anomalies text January 2018
Muon-electron conversion in strange quark sea text January 2001
Importance of Loop Effects in Explaining the Accumulated Evidence for New Physics in B Decays with a Vector Leptoquark text January 2019

Cited By (23)

Phenomenology of $\,{{b\to c\tau\bar\nu }}\,$ decays in a scalar leptoquark model journal July 2019
Common explanation to the R K ( * ) , R D ( * ) , and ε ′ / ε anomalies in a 3HDM with right-handed neutrinos and connections to neutrino physics journal September 2019
Charged current b → c τ ν ¯ τ anomalies in a general W ′ boson scenario journal November 2019
Investigation of effects of new physics in Λ b → Λ c τ ν ¯ τ decay journal December 2019
Implications for new physics in $$b\rightarrow s \mu \mu $$b→sμμ transitions after recent measurements by Belle and LHCb journal October 2019
B-physics anomalies: The bridge between R-parity violating Supersymmetry and flavoured Dark Matter text January 2019
Common explanation to the R K ( * ) , R D ( * ) , and ε ′ / ε anomalies in a 3HDM with right-handed neutrinos and connections to neutrino physics journal September 2019
Investigation of effects of new physics in Λ b → Λ c τ ν ¯ τ decay journal December 2019
Boosting vector leptoquark searches with boosted tops journal June 2020
Implications for new physics in $$b\rightarrow s \mu \mu $$b→sμμ transitions after recent measurements by Belle and LHCb journal October 2019
Investigating the production of leptoquarks by means of zeros of amplitude at photon electron collider journal June 2020
Where we are on B-physics discrepancies
  • Guadagnoli, Diego
  • Proceedings of Corfu Summer Institute 2019 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2019) https://doi.org/10.22323/1.376.0022
conference August 2020
$B$ anomalies under the lens of electroweak precision text January 2020
B-decay discrepancies after Moriond 2019 text January 2019
Implications for Electric Dipole Moments of a Leptoquark Scenario for the $B$-Physics Anomalies text January 2020
A Common Origin of Neutrino Masses and $R_{D^{(\ast)}}$, $R_{K^{(\ast)}}$ Anomalies text January 2020
Third-family quark-lepton unification with a fundamental composite Higgs text January 2020
Lepton-Quark Fusion at Hadron Colliders, precisely preprint January 2020
Flavor Non-universal Pati-Salam Unification and Neutrino Masses text January 2020
Prospects of gravitational waves in the minimal left-right symmetric model text January 2020
Test of lepton universality in beauty-quark decays text January 2021
Reading the footprints of the B-meson flavor anomalies text January 2021
Lepton-flavor violation and lepton-flavor-universality violation in b and c decays preprint January 2022

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