Anomalous Z′ bosons for anomalous B decays
Reads0
Chats0
TLDR
In this paper, an anomalous U(1)X gauge symmetry was proposed, where X = Y3 + a(Lμ − Lτ)/6, and the heavy Z′ boson associated with spontaneously breaking U( 1)X at the TeV scale mediates the b → sll transitions, and a desire to preserve the accidental symmetries of the Standard Model (SM) was expressed.Abstract:
Motivated by the intriguing discrepancies in b → sll transitions, the fermion mass problem, and a desire to preserve the accidental symmetries of the Standard Model (SM), we extend the SM by an anomalous U(1)X gauge symmetry where X = Y3 + a(Lμ − Lτ)/6. The heavy Z′ boson associated with spontaneously breaking U(1)X at the TeV scale mediates the b → sll anomalies via $$ {\mathcal{O}}_9^{\mu}\sim \frac{1}{\Lambda^2}\left(\overline{s}{\gamma}_{\rho }{P}_Lb\right)\left(\overline{\mu}{\gamma}^{\rho}\mu \right) $$
. We show that this model, which features mixed gauge anomalies involving U(1)X and hypercharge, can be made anomaly-free for any a ∈ ℤ by integrating in a pair of charged fermions whose masses naturally reside somewhere between 1 and 30 TeV. The gauge symmetry permits only the third family Yukawas at the renormalisable level, and so the light quark masses and mixings are controlled by accidental U(2)3 flavour symmetries which we assume are minimally broken alongside U(1)X. The lepton sector is not governed by U(2) symmetries, but rather one expects a nearly diagonal charged lepton Yukawa with me,μ « mτ. The model does not explain the hierarchy me « mμ, but it does possess high quality lepton flavour symmetries that are robust to the heavy physics responsible for generating me,μ. We establish the viability of these models by checking agreement with the most important experimental constraints. We comment on how the model could also explain neutrino masses and the muon g − 2.read more
Citations
More filters
Posted ContentDOI
$B$ Flavour Anomalies: 2021 Theoretical Status Report
David London,Joaquim Matias +1 more
TL;DR: In this article, the authors present theoretical new-physics explanations from both a model-independent effective-field-theory point of view and through the building of explicit models, and stress the complementarity of these two approaches.
Journal ArticleDOI
<i>B</i> Flavor Anomalies: 2021 Theoretical Status Report
TL;DR: In this article , the authors present theoretical new physics explanations from both a model-independent effective field theory point of view and through the building of explicit models, and stress the complementarity of these two approaches.
Journal ArticleDOI
Muonic force behind flavor anomalies
TL;DR: In this article , an economical theoretical framework for combined explanations of the flavor physics anomalies involving muons was developed, where the standard model was supplemented with a lepton-flavored U(1) X gauge group.
Journal ArticleDOI
M W helps select Z ' models for b → s ℓ ℓ anomalies.
B.G. Allanach,Joseph Davighi +1 more
TL;DR: In this article , the authors generalize the gauge charge assignments to the anomaly-free combination sY3+t(B3-L3) and show that incorporating the 2022 CDF II measurement of MW selects a viable domain of integers s and t.
Journal ArticleDOI
Global fits of third family hypercharge models to neutral current B-anomalies and electroweak precision observables
TL;DR: In this paper, the authors performed global fits of several third family hypercharge models to a combination of electroweak data and those data pertinent to the neutral current B-anomalies.
References
More filters
Journal ArticleDOI
Anomaly cancellations in supersymmetric D=10 gauge theory and superstring theory
TL;DR: In this article, a superstring theory for E 8 × 8 × E 8 has been constructed, based on SO(32) and the remaining pieces of all the anomalies cancel if the gauge group is SO (32) or E 8×E 8.
Journal ArticleDOI
Hierarchy of Quark Masses, Cabibbo Angles and CP Violation
TL;DR: In this paper, the generalized Cabibbo mixing angle connecting two types of quarks is predicted to be given order of magnitude wise by the square root of the corresponding quark mass ratio.
Journal ArticleDOI
An SU(2) anomaly
TL;DR: In this paper, a new restriction of fermion quantum numbers in gauge theories is derived, and it is shown that an SU(2) gauge theory with an odd number of left-handed fermions doublets is mathematically inconsistent.
Journal ArticleDOI
The muon g ― 2
TL;DR: In this article, the authors present a review of the status of the theoretical prediction and in particular discuss the role of the hadronic vacuum polarization effects and hadronic light-by-light scattering correction, including a new evaluation of the dominant pion exchange contribution.
Journal ArticleDOI
The anomalous magnetic moment of the muon in the Standard Model
T. Aoyama,Nils Asmussen,M. Benayoun,Johan Bijnens,Tom Blum,M. Bruno,I. Caprini,C. M. Carloni Calame,Marco Cè,Marco Cè,Marco Cè,Gilberto Colangelo,F. Curciarello,Henryk Czyz,I. Danilkin,M. Davier,Christine Davies,M. Della Morte,S.I. Eidelman,Aida X. El-Khadra,Aida X. El-Khadra,Antoine Gérardin,D. Giusti,Maarten Golterman,Steven Gottlieb,V. Gülpers,Franziska Hagelstein,Masashi Hayakawa,Gregorio Herdoiza,D. W. Hertzog,A. Hoecker,Martin Hoferichter,Martin Hoferichter,B.-L. Hoid,Renwick J. Hudspith,Renwick J. Hudspith,F. Ignatov,Taku Izubuchi,Fred Jegerlehner,Luchang Jin,A. Keshavarzi,T. Kinoshita,T. Kinoshita,Bastian Kubis,A. Kupich,A. Kupść,Laetitia Laub,Christoph Lehner,Christoph Lehner,Laurent Lellouch,I.B. Logashenko,Bogdan Malaescu,Kim Maltman,Kim Maltman,Marina Marinkovic,Marina Marinkovic,Pere Masjuan,Aaron S. Meyer,Harvey B. Meyer,Harvey B. Meyer,T. Mibe,K. Miura,K. Miura,K. Miura,Stefan E. Müller,M. Nio,D. Nomura,Andreas Nyffeler,Vladimir Pascalutsa,M. Passera,E. Perez del Rio,Santiago Peris,Antonin Portelli,Massimiliano Procura,C. F. Redmer,B. L. Roberts,Pablo Sanchez-Puertas,S. I. Serednyakov,B.A. Shwartz,Silvano Simula,D. Stöckinger,H. Stöckinger-Kim,Peter Stoffer,Thomas Teubner,R. S. Van de Water,Marc Vanderhaeghen,Marc Vanderhaeghen,G. Venanzoni,G. von Hippel,Hartmut Wittig,Hartmut Wittig,Zhiqing Zhang,M.N. Achasov,A. Bashir,Nuno Cardoso,Bipasha Chakraborty,E.-H. Chao,J. Charles,Andreas Crivellin,Andreas Crivellin,O. Deineka,A. Denig,A. Denig,Carleton DeTar,Cesareo A. Dominguez,A. E. Dorokhov,V. P. Druzhinin,Gernot Eichmann,M. Fael,Christian S. Fischer,Elvira Gamiz,Z. Gelzer,Jeremy Green,S. Guellati-Khelifa,D. Hatton,Nils Hermansson-Truedsson,S. Holz,B. Hörz,M. Knecht,Jonna Koponen,Andreas S. Kronfeld,Jack Laiho,S. Leupold,P. B. Mackenzie,W. J. Marciano,Craig McNeile,Daniel Mohler,Daniel Mohler,J. Monnard,Ethan T. Neil,A. V. Nesterenko,Konstantin Ottnad,Vladyslav Pauk,A. E. Radzhabov,E. de Rafael,K. Raya,Andreas Risch,Antonio Rodríguez-Sánchez,Pablo Roig,T. San José,T. San José,E. P. Solodov,Robert L. Sugar,K. Yu. Todyshev,Arkady Vainshtein,A. Vaquero Avilés-Casco,Esther Weil,Jonas Wilhelm,Richard Williams,A. S. Zhevlakov +149 more
TL;DR: The current status of the Standard Model calculation of the anomalous magnetic moment of the muon is reviewed in this paper, where the authors present a detailed account of recent efforts to improve the calculation of these two contributions with either a data-driven, dispersive approach, or a first-principle, lattice approach.
Related Papers (5)
Third family hypercharge model for $ {R}_{K^{\left(\ast \right)}} $ and aspects of the fermion mass problem
Ben C. Allanach,Joe Davighi +1 more
Low scale U(1)X gauge symmetry as an origin of dark matter, neutrino mass and flavour anomalies
Contributions to b → sℓℓ anomalies from R-parity violating interactions
Kevin Earl,Thomas Grégoire +1 more