Reevaluating uncertainties in B¯→ Xsγ decay

A bstract The rare decay B ¯ → X s γ is an important probe of physics beyond the standard model. The largest uncertainty on the total rate and the CP asymmetry arises from resolved photon contributions. These appear first at order 1 /m b and are related to operators other than Q 7 γ in the effective...

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Bibliographic Details
Published inThe journal of high energy physics Vol. 2019; no. 11; p. 141
Main Authors Gunawardana, Ayesh, Paz, Gil
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.11.2019
Springer Nature B.V
Subjects
Approximation
Asymmetry
Classical and Quantum Gravitation
Decay
Elementary Particles
High energy physics
Parameters
Photons
Physics
Physics and Astronomy
Polynomials
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Quarks
Regular Article - Theoretical Physics
Relativity Theory
String Theory
Uncertainty
Heavy Quark Physics
CP violation
Nonperturbative Effects
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Summary:A bstract The rare decay B ¯ → X s γ is an important probe of physics beyond the standard model. The largest uncertainty on the total rate and the CP asymmetry arises from resolved photon contributions. These appear first at order 1 /m b and are related to operators other than Q 7 γ in the effective weak Hamiltonian. One of the three leading contributions, Q 1 q − Q 7 γ , is described by a non-local function whose moments are related to HQET parameters. We use recent progress in our knowledge of these parameters to reevaluate the resolved photon contribution to B ¯ → X s γ total rate and CP asymmetry.
ISSN:1029-8479
DOI:10.1007/JHEP11(2019)141