Dispersive approach to hadronic light-by-light scattering
TLDR
In this article, a formalism for a model-independent evaluation of the hadronic light-by-light contribution to the anomalous magnetic moment of the muon is presented.Abstract:
Based on dispersion theory, we present a formalism for a model-independent evaluation of the hadronic light-by-light contribution to the anomalous magnetic moment of the muon. In particular, we comment on the definition of the pion pole in this framework and provide a master formula that relates the effect from ππ intermediate states to the partial waves for the process γ
*
γ
*
→ ππ. All contributions are expressed in terms of on-shell form factors and scattering amplitudes, and as such amenable to an experimental determination.read more
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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.
Journal ArticleDOI
Muon g − 2 and α ( M Z 2 ) : A new data-based analysis
TL;DR: In this paper, the authors presented a complete reevaluation of the hadronic vacuum polarization contributions to the anomalous magnetic moment of the muon, aμhad,VP, and Δαhad(MZ2), from the combination of e+e-→hadrons cross section data.
Journal ArticleDOI
Three-pion contribution to hadronic vacuum polarization
TL;DR: In this paper, the authors used a global fit function based on analyticity and unitarity of the underlying ε-gamma-to-3-pi amplitude and its normalization from a chiral low-energy theorem to check the internal consistency of the various ε+e^-to 3-pi data sets.
Journal ArticleDOI
Two-pion contribution to hadronic vacuum polarization
TL;DR: The contribution of the 3π channel to hadronic vacuum polarization (HVP) using a dispersive representation of the e+e− → 3π amplitude was studied in this paper.
Journal ArticleDOI
Longitudinal short-distance constraints for the hadronic light-by-light contribution to (g − 2)μ with large-Nc Regge models
Gilberto Colangelo,Franziska Hagelstein,Martin Hoferichter,Martin Hoferichter,Laetitia Laub,Peter Stoffer +5 more
TL;DR: In this paper, the authors considered a tower of excited pseudoscalars, constraining their masses and transition form factors from Regge theory, the OPE, and phenomenology.
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Journal ArticleDOI
Hadronic light-by-light scattering contribution to the muon anomalous magnetic moment reexamined
TL;DR: In this article, Davier et al. discuss the hadronic light-by-light scattering contribution to the muon anomalous magnetic moment, paying particular attention to the consistent matching between the short-and the long-distance behavior of the light by light scattering amplitude.
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