New Measurement of the Electron Magnetic Moment and the Fine Structure Constant
TLDR
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.Abstract:
A measurement using a one-electron quantum cyclotron gives 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. The electron is used as a magnetometer to allow line shape statistics to accumulate, and its spontaneous emission rate determines the correction for its interaction with a cylindrical trap cavity. The new measurement and QED theory determine the fine structure constant, with alpha{-1}=137.035 999 084 (51) [0.37 ppb], and an uncertainty 20 times smaller than for any independent determination of alpha.read more
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Phd by thesis
TL;DR: In this paper, a sedimentological core and petrographic characterisation of samples from eleven boreholes from the Lower Carboniferous of Bowland Basin (Northwest England) is presented.
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The size of the proton
Randolf Pohl,Aldo Antognini,François Nez,F. D. Amaro,F. Biraben,João Cardoso,D. S. Covita,D. S. Covita,Andreas Dax,Satish Dhawan,L.M.P. Fernandes,Adolf Giesen,Adolf Giesen,Thomas Graf,Theodor W. Hänsch,Paul Indelicato,Lucile Julien,Cheng-Yang Kao,Paul E. Knowles,Eric-Olivier Le Bigot,Yi-Wei Liu,J. A. M. Lopes,Livia Ludhova,C.M.B. Monteiro,Françoise Mulhauser,Françoise Mulhauser,Tobias Nebel,Paul Rabinowitz,Joaquim M. F. dos Santos,Lukas A. Schaller,Karsten Schuhmann,Catherine Schwob,David Taqqu,J.F.C.A. Veloso,Franz Kottmann +34 more
TL;DR: The root-mean-square charge radius, rp, has been determined with an accuracy of 2 per cent by electron–proton scattering experiments, and the present most accurate value of rp (with an uncertainty of 1 per cent) is given by the CODATA compilation of physical constants.
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Search for New Physics with Atoms and Molecules
Marianna Safronova,Dmitry Budker,David DeMille,Derek F. Jackson Kimball,Andrei Derevianko,Charles W. Clark +5 more
TL;DR: In this article, the authors present a review of the application of atomic physics to address important challenges in physics and to look for variations in the fundamental constants, search for interactions beyond the standard model of particle physics and test the principles of general relativity.
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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.
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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.
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Quantum-Spacetime Phenomenology
TL;DR: This work reviews the current status of phenomenological programs inspired by quantum-spacetime research and stresses the significance of results establishing that certain data analyses provide sensitivity to effects introduced genuinely at the Planck scale.
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