Journal article icon

Journal article

Chromomagnetic Dipole-Operator Corrections in Bbar -> X_sgamma at O(beta_0 alpha_s^2)

Abstract:
We calculate the fermionic corrections to the photon-energy spectrum of Bbar -> X_sgamma which arise from the self-interference of the chromomagnetic dipole operator Q_8 at next-to-next-to-leading order by applying naive non-abelianization. The resulting O(beta_0 alpha_s^2) correction to the Bbar -> X_sgamma branching ratio amounts to a relative shift of +0.12% (+0.27%) for a photon-energy cut of 1.6 GeV (1.0 GeV). We also comment on the potential size of resummation and non-perturbative effects related to Q_8.

Actions


Access Document


Publisher copy:
10.1103/PhysRevD.82.094012

Authors


Ferroglia, A More by this author
More by this author
Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Theoretical Physics
Journal:
Phys.Rev.D
Volume:
82
Pages:
094012
Publication date:
2010-09-11
DOI:
URN:
uuid:84c7e156-262e-40e0-9bed-6119d5bd47ba
Source identifiers:
177536
Local pid:
pubs:177536
Keywords:

Terms of use


Metrics



If you are the owner of this record, you can report an update to it here: Report update to this record

TO TOP