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Title: First NNLL Prediction of B(\barB \rightarrow X_s \gamma)

Abstract

The authors discuss the first NNLL prediction of the B {yields} X{sub s}{gamma} branching ratio, including important additional subtleties due to non-perturbative corrections and logarithmically-enhanced cut effects.

Authors:
;
Publication Date:
Research Org.:
Stanford Linear Accelerator Center (SLAC)
Sponsoring Org.:
USDOE
OSTI Identifier:
900988
Report Number(s):
SLAC-PUB-12395
TRN: US200711%%750
DOE Contract Number:
AC02-76SF00515
Resource Type:
Conference
Resource Relation:
Conference: Invited talk at 33rd International Conference on High Energy Physics (ICHEP 06), Moscow, Russia, 26 Jul - 2 Aug 2006
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BRANCHING RATIO; FORECASTING; HIGH ENERGY PHYSICS; Theory-HEP,HEPEX, HEPPH, HEPTH

Citation Formats

Hurth, Tobias, and /CERN /SLAC. First NNLL Prediction of B(\barB \rightarrow X_s \gamma). United States: N. p., 2007. Web.
Hurth, Tobias, & /CERN /SLAC. First NNLL Prediction of B(\barB \rightarrow X_s \gamma). United States.
Hurth, Tobias, and /CERN /SLAC. Wed . "First NNLL Prediction of B(\barB \rightarrow X_s \gamma)". United States. doi:. https://www.osti.gov/servlets/purl/900988.
@article{osti_900988,
title = {First NNLL Prediction of B(\barB \rightarrow X_s \gamma)},
author = {Hurth, Tobias and /CERN /SLAC},
abstractNote = {The authors discuss the first NNLL prediction of the B {yields} X{sub s}{gamma} branching ratio, including important additional subtleties due to non-perturbative corrections and logarithmically-enhanced cut effects.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Mar 14 00:00:00 EDT 2007},
month = {Wed Mar 14 00:00:00 EDT 2007}
}

Conference:
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  • The present NLL prediction for the decay rate of the rare inclusive process {bar B} {yields} X{sub s}{gamma} has a large uncertainty due to the charm mass renormalization scheme ambiguity. We estimate that this uncertainty will be reduced by a factor of 2 at the NNLL level. This is a strong motivation for the on-going NNLL calculation, which will thus significantly increase the sensitivity of the observable {bar B} {yields} X{sub s}{gamma} to possible new degrees of freedom beyond the SM. We also give a brief status report of the NNLL calculation.
  • We present an independent calculation of that part of the O({alpha}{sub s}{sup 2}) contribution to dipole operator {Omicron}{sub 7}. Using a different method, we find complete agreement mass ambiguity appearing at NLL accuracy. the complete NNLL prediction of {Lambda}({bar B} {yields} X{sub s}{gamma}) which will resolve the charm quark the decay width {Lambda}({bar B} {yields} X{sub s}{gamma}) which arises from the self-interference term of the electromagnetic with a previous calculation. This NNLL contribution is an important ingredient for
  • Combining our results for various {Omicron}({alpha}{sub s}{sup 2}) corrections to the weak radiative B-meson decay, we are able to present the first estimate of the branching ratio at the next-to-next-to-leading order in QCD. We find {Beta}({bar B} {yields} X{sub s}{gamma}) = (3.15 {+-} 0.23) x 10{sup -4} for E{sub {gamma}} > 1.6 GeV in the {bar B}-meson rest frame. The four types of uncertainties: non-perturbative (5%), parametric (3%), higher-order (3%) and m{sub c}-interpolation ambiguity (3%) have been added in quadrature to obtain the total error.
  • A review of the results obtained from the analysis of the B meson decays that involve Radiative Penguin processes, recorded at the BaBar experiment at the Stanford Linear Accelerator Center PEP-II B-Factory, is presented. The physics interest of these processes and their SM prediction are discussed briefly. The most relevant selection techniques used in the analysis are described before quoting the latest results made public by the BaBar collaboration as of July 2003.
  • We outline the physics goals of a B-barB factory to produce greater than 10/sup 8/ B/sup 0//sub d/, B/sup +- / per year. Emphasis is placed on the search for large CP violating effects in rare B decays. An e/sup +/e/sup -/ linear collider is proposed for the B-barB factory and a preliminary estimate of the parameters of the machine that might reach L = 10/sup 34/ cm/sup -2/ sec/sup -1/ is given.