Muon anomalous magnetic moment: A harbinger for “new physics”

Standard model loop contributions to the muon anomalous magnetic moment, a{sub {mu}}{equivalent_to}(g{sub {mu}}{minus}2)/2, and their theoretical uncertainties are scrutinized. The status and implications of the recently reported 2.6 sigma experiment versus theory deviation a{sub {mu}}{sup expt}{min...

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Bibliographic Details
Published in:Physical review. D, Particles and fields Particles and fields, 2001-07, Vol.64 (1), Article 013014
Main Authors: Czarnecki, Andrzej, Marciano, William J.
Format: Article
Language:English
Subjects:
MAGNETIC MOMENTS
MUONS
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
STANDARD MODEL
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Summary:Standard model loop contributions to the muon anomalous magnetic moment, a{sub {mu}}{equivalent_to}(g{sub {mu}}{minus}2)/2, and their theoretical uncertainties are scrutinized. The status and implications of the recently reported 2.6 sigma experiment versus theory deviation a{sub {mu}}{sup expt}{minus}a{sub {mu}}{sup SM}=426(165){times}10{sup {minus}11} are discussed. Possible explanations due to supersymmetric loop effects with m{sub SUSY}{approx_equal}55{sub {minus}8}{sup +16}{radical}tan{beta} GeV, radiative mass mechanisms at the 1{endash}2 TeV scale and other {open_quotes}new physics{close_quotes} scenarios are examined.
ISSN:0556-2821
1089-4918
DOI:10.1103/PhysRevD.64.013014