Anatomy of the Higgs Boson Decay into Two Photons in the Unitary Gauge
Joint Authors
Suxho, Kristaq
Dedes, Athanasios
Source
Advances in High Energy Physics
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-06-18
Country of Publication
Egypt
No. of Pages
13
Main Subjects
Abstract EN
We review and clarify computational issues about the W-gauge boson one-loop contribution to the H→γγ decay amplitude, in the unitary gauge and in the Standard Model.
We find that highly divergent integrals depend upon the choice of shifting momenta with arbitrary vectors.
One particular combination of these arbitrary vectors reduces the superficial divergency down to a logarithmic one.
The remaining ambiguity is then fixed by exploiting gauge invariance and the Goldstone Boson Equivalence Theorem.
Our method is strictly realised in four dimensions.
The result for the amplitude agrees with the “famous” one obtained using dimensional regularisation (DR) in the limit d→4, where d is the number of spatial dimensions in Euclidean space.
At the exact equality d=4, a three-sphere surface term appears that renders the Ward Identities and the equivalence theorem inconsistent.
We also examined a recently proposed four-dimensional regularisation scheme and found agreement with the DR outcome.
American Psychological Association (APA)
Dedes, Athanasios& Suxho, Kristaq. 2013. Anatomy of the Higgs Boson Decay into Two Photons in the Unitary Gauge. Advances in High Energy Physics،Vol. 2013, no. 2013, pp.1-13.
https://search.emarefa.net/detail/BIM-486691
Modern Language Association (MLA)
Dedes, Athanasios& Suxho, Kristaq. Anatomy of the Higgs Boson Decay into Two Photons in the Unitary Gauge. Advances in High Energy Physics No. 2013 (2013), pp.1-13.
https://search.emarefa.net/detail/BIM-486691
American Medical Association (AMA)
Dedes, Athanasios& Suxho, Kristaq. Anatomy of the Higgs Boson Decay into Two Photons in the Unitary Gauge. Advances in High Energy Physics. 2013. Vol. 2013, no. 2013, pp.1-13.
https://search.emarefa.net/detail/BIM-486691
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-486691