Towards an improved test of the standard model's most precise prediction
TLDR
The electron and positron magnetic moments are the most precise prediction of the standard model of particle physics as mentioned in this paper, and the most accurate measurement of a property of an elementary particle has been made to test this result.Abstract:
The electron and positron magnetic moments are the most precise prediction of the standard model of particle physics. The most accurate measurement of a property of an elementary particle has been made to test this result. A new experimental method is now being employed in an attempt to improve the measurement accuracy by an order of magnitude. Positrons from a “student source” now suffice for the experiment. Progress toward a new measurement is summarized.read more
Citations
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Determination of the fine-structure constant with an accuracy of 81 parts per trillion
TL;DR: The value of the fine-structure constant α differs by more than 5 standard deviations from the best available result from caesium recoil measurements, which modifies the constraints on possible candidate dark-matter particles proposed to explain the anomalous decays of excited states of 8Be nuclei and paves the way for testing the discrepancy observed in the magnetic moment anomaly of the muon in the electron sector.
Journal ArticleDOI
Electric dipole moments in a leptoquark scenario for the B-physics anomalies
Wolfgang Altmannshofer,Stefania Gori,Hiren H. Patel,Stefano Profumo,Douglas Tuckler,Douglas Tuckler +5 more
TL;DR: In this article, the authors explore constraints and discovery potential for electric dipole moments (EDMs) in leptonic and hadronic systems, and find that O(1) CP-violating phases in tau and muon couplings can lead to corresponding EDMs within reach of next-generation EDM experiments.
Journal ArticleDOI
Implications for Electric Dipole Moments of a Leptoquark Scenario for the $B$-Physics Anomalies
TL;DR: Altmannshofer et al. as discussed by the authors explored constraints and discovery potential for electric dipole moments (EDMs) in leptonic and hadronic systems, and provided the most generic expressions for dipole moment induced by vector leptoquarks at one loop.
Journal ArticleDOI
Logarithmically enhanced Euler-Heisenberg Lagrangian contribution to the electron gyromagnetic factor
TL;DR: In this article, the Euler-Heisenberg Lagrangian was used to find that two-loop radiative corrections to the $g$ factor of an electron bound in a hydrogen-like ion exhibit logarithmic enhancement due to long-distance light-by-light scattering amplitude.
Journal ArticleDOI
Measurement of the Electron Magnetic Moment
TL;DR: The electron magnetic moment, −μ/μB=g/2=1.13 ppt, was determined 2.2 times more accurately than the value that stood for fourteen years as discussed by the authors .
References
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Journal ArticleDOI
APS : Review of Particle Physics, 2018-2019
Masaharu Tanabashi,Paul William Richardson,A Bettini,Andreas Vogt,L. Garren,A J Schwartz,K Terashi,M Karliner,R.S. Chivukula,Torbjörn Sjöstrand,J. Beringer,Siegfried Bethke,G. Gerbier,Paolo Nason,Herbert K. Dreiner,Younghoon Kwon,J. J. Beatty,E Pianori,M. Silari,John A. Peacock,Alessandro Cerri,A. de Gouvea,Ren-Yuan Zhu,Christian W. Bauer,T Mannel,Tony Liss,M. Pennington,Daniel Tovey,Fabio Sauli,Kurtis F Johnson,Stephen R. Sharpe,C. Hanhart,T. Sumiyoshi,J Anderson,Howard Baer,John Matthews,H. R. Gallagher,Debadi Chakraborty,Thomas DeGrand,L. R. Wiencke,Howard E. Haber,A Höcker,Filip Moortgat,Mario Antonelli,Arnulf Quadt,J Tanaka,P A Zyla,G. Venanzoni,Yoshinari Hayato,Giancarlo D'Ambrosio,C.T. Sachrajda,U Thoma,G Rybka,D. E. Groom,Matthias Neubert,Gavin P. Salam,H. Bichsel,E. J. Weinberg,Ken Ichi Hikasa,A Pomarol,Peter Skands,S. Sánchez Navas,D Wands,A Freitas,G Aielli,Zoltan Ligeti,Andreas Ringwald,P. Nevski,T Shutt,Maksym Titov,T Hyodo,David H. Weinberg,Sophia L. Stone,Kaustubh Agashe,Alberto Masoni,O Buchmuller,Douglas Scott,S L Zhu,L Fuller,S. Pagan Griso,Alan D. Martin,K. S. Lugovsky,Hitoshi Murayama,Kaoru Hagiwara,R A Ryutin,Manuel Drees,Christoph Grab,Sw. Banerjee,Brian D. Fields,M. C. Goodman,M A Bychkov,B. K. Heltsley,D A Dwyer,T. Basaglia,Chi Lin,Daniel de Florian,Georg G. Raffelt,H. Spieler,Frank Zimmermann,Jonas Rademacker,S. Rolli,C. Grojean,Burkert,Claude Amsler,J Lesgourgues,Th. Gutsche,J. Erler,Klaus Mönig,German Valencia,Y Gershtein,John Terning,J. G. Smith,J. Womersley,A Lusiani,J Ellis,Y. Sakai,A. Piepke,Eberhard Klempt,A. Stahl,K D Irwin,Andrei Gritsan,P Eerola,V A Petrov,George F. Smoot,Subir Sarkar,G P Zeller,William J. Marciano,Keith A. Olive,C. Patrignani,Ron L. Workman,Fabio Maltoni,G. Dissertori,Y Sumino,Christian Spiering,Yu V. Kuyanov,U G Meißner,Marcela Carena,B. Krusche,R E Mitchell,Timothy Gershon,Frank Krauss,Meenakshi Narain,N Varelas,Wolfgang Walkowiak,Ezhela,Kenneth G. Hayes,Augusto Ceccucci,Stefan Roesler,F Takahashi,J Hisano,Petr Vogel,M O Wascko,L Verde,S. T. Petcov,Michael Syphers,V I Belousov,Ofer Lahav,Oleg Zenin,C. L. Woody,Andrew R. Liddle,M D'Onofrio,Marumi Kado,Orin I. Dahl,S. R. Klein,M Moskovic,D. M. Asner,A. Gurtu,D. R. Ward,Mingshui Chen,S Heinemeyer,R. Kowalewski,A A Godizov,David Milstead,Manuella Vincter,S.I. Eidelman,R Firestone,L.J. Rosenberg,Martin Grunewald,K M Black,N. P. Tkachenko,Bogdan A. Dobrescu,Tony Gherghetta,W-M. Yao,S Willocq,R. M. Barnett,A Holtkamp,L. S. Littenberg,Michal Kreps,R S Thorne,O. Schneider,Paolo Molaro,W. Fetscher,Jamie Holder,Nils A. Tornqvist,E. Blucher,P. Schaffner,Uli Katz,Anatoli Romaniouk,P. de Jong,B. Foster,Sharma,Shoji Hashimoto,Kate Scholberg,R. G. Van de Water,T Skwarnicki,C. W. Walter,J. A. Parsons,Georg Weiglein,R. N. Cahn,Charles G Wohl,Jonathan L. Rosner,V. S. Lugovsky,B. N. Ratcliff,Martin White,Y. Nir,H J Gerber,S. P. Wakely,C Lippmann,Jack Laiho,Otmar Biebel,J.J. Hernández-Rey,Thibault Damour,G. Cowan,Y Makida,L. Tiator,Michael Doser,S. M. Spanier,S. B. Lugovsky,A Hebecker,Koji Nakamura,Aneesh V. Manohar +230 more
TL;DR: The complete review as discussed by the authors is published online on the website of the Particle Data Group (http://pdg.lbl.gov) and in a journal. Volume 1 is available in print as thePDG Book.
Journal ArticleDOI
Final report of the E821 muon anomalous magnetic moment measurement at BNL
G. W. Bennett,B. Bousquet,H. N. Brown,Gerry Bunce,R. M. Carey,P. Cushman,G. T. Danby,P. T. Debevec,M. Deile,H. Deng,William Deninger,S. K. Dhawan,V. P. Druzhinin,L. Duong,E. Efstathiadis,F. J. M. Farley,G.V. Fedotovich,S. Giron,Frederick Gray,D.N. Grigoriev,M. Grosse-Perdekamp,A. Grossmann,M. F. Hare,D. W. Hertzog,X. Huang,Vernon W. Hughes,Masahiko Iwasaki,Klaus-Peter Jungmann,Klaus-Peter Jungmann,D. Kawall,M. Kawamura,B.I. Khazin,J. Kindem,F. Krienen,I. Kronkvist,A. Lam,Rasmus Larsen,Y. Y. Lee,I. Logashenko,I. Logashenko,R. McNabb,R. McNabb,Wuzheng Meng,J. Mi,J. P. Miller,Y. Mizumachi,William Morse,D. Nikas,C. J. G. Onderwater,C. J. G. Onderwater,Yuri F. Orlov,C. S. Özben,C. S. Özben,J. M. Paley,Q. Peng,C. C. Polly,J. Pretz,R. Prigl,G. zu Putlitz,T. Qian,S. I. Redin,S. I. Redin,O. Rind,B. L. Roberts,N.M. Ryskulov,S. Sedykh,Yannis K. Semertzidis,P. M. Shagin,Yu. M. Shatunov,E. P. Sichtermann,E. P. Solodov,M. Sossong,A. Steinmetz,L. R. Sulak,C. Timmermans,Alexei Trofimov,D. Urner,P. von Walter,D. Warburton,D. Winn,A. Yamamoto,D. Zimmerman +81 more
TL;DR: In this article, the authors presented the final report from a series of precision measurements of the muon anomalous magnetic moment, a(mu)=(g-2)/2.54 ppm, which represents a 14-fold improvement compared to previous measurements at CERN.
Journal ArticleDOI
New Measurement of the Electron Magnetic Moment and the Fine Structure Constant
TL;DR: A measurement using a one-electron quantum cyclotron gave the electron magnetic moment in Bohr magnetons, g/2=1.001 159 652 180 73 (28) [0.28 ppt], with an uncertainty 2.7 and 15 times smaller than for previous measurements in 2006 and 1987.
Journal ArticleDOI
Measurement of the fine-structure constant as a test of the Standard Model
TL;DR: Using the recoil frequency of cesium-133 atoms in a matter-wave interferometer, the most accurate measurement of the fine-structure constant α = 1/137.035999046(27) at 2.0 × 10 −10 accuracy was reported in this article.
Journal ArticleDOI
New high-precision comparison of electron and positron g factors.
TL;DR: In this article, single electrons and positrons were alternately isolated in the same compensated Penning trap in order to form the geonium pseudoatom under nearly identical conditions, and a search for systematic effects uncovered a small (but common) residual shift due to the cyclotron excitation field.
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