Two-loop electroweak corrections for the K{yields}{pi}{nu}{nu} decays
Journal Article
·
· Physical Review. D, Particles Fields
- Excellence Cluster Universe, Technische Universitaet Muenchen, Boltzmannstrasse 2, D-85748 Garching (Germany)
The rare K{yields}{pi}{nu}{anti {nu}} decays play a central role in testing the standard model and its extensions. Upcoming experiments plan to measure the decay rates with high accuracy. Yet, unknown higher-order electroweak corrections result in a sizeable theory error. We remove this uncertainty by computing the full two-loop electroweak corrections to the top-quark contribution X{sub t} to the rare decays K{sub L}{yields}{pi}{sup 0}{nu}{anti {nu}}, K{sup +}{yields}{pi}{sup +}{nu}{anti {nu}}, and B{yields}X{sub d,s}{nu}{anti {nu}} in the standard model. The remaining theoretical uncertainty related to electroweak effects is now far below 1%. Finally we update the branching ratios to find Br(K{sub L}{yields}{pi}{sup 0}{nu}{anti {nu}})=2.43(39)(6)x10{sup -11} and Br(K{sup +}{yields}{pi}{sup +}{nu}{anti {nu}})=7.81(75)(29)x10{sup -11}. The first error summarizes the parametric, the second the remaining theoretical uncertainties.
- OSTI ID:
- 21504890
- Journal Information:
- Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 3 Vol. 83; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCURACY
BOSONS
BRANCHING RATIO
CORRECTIONS
DECAY
DIMENSIONLESS NUMBERS
ELEMENTARY PARTICLES
ERRORS
FERMIONS
FIELD THEORIES
GRAND UNIFIED THEORY
HADRONS
KAONS
LEPTONS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MESONS
NEUTRINOS
PARTICLE DECAY
PARTICLE MODELS
PIONS
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
QUANTUM FIELD THEORY
QUARKS
STANDARD MODEL
STRANGE MESONS
STRANGE PARTICLES
T QUARKS
TESTING
TOP PARTICLES
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES
WEINBERG-SALAM GAUGE MODEL
ACCURACY
BOSONS
BRANCHING RATIO
CORRECTIONS
DECAY
DIMENSIONLESS NUMBERS
ELEMENTARY PARTICLES
ERRORS
FERMIONS
FIELD THEORIES
GRAND UNIFIED THEORY
HADRONS
KAONS
LEPTONS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MESONS
NEUTRINOS
PARTICLE DECAY
PARTICLE MODELS
PIONS
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
QUANTUM FIELD THEORY
QUARKS
STANDARD MODEL
STRANGE MESONS
STRANGE PARTICLES
T QUARKS
TESTING
TOP PARTICLES
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES
WEINBERG-SALAM GAUGE MODEL