Towards the NNLL precision in $\bar B \to X_s \gamma$

The present NLL prediction for the decay rate of the rare inclusive process $\bar B \to X_s \gamma$ 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 th...

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Detalles Bibliográficos
Autores principales: Asatrian, Hrachia M., Hovhannisyan, Artyom, Poghosyan, Vahagn, Greub, Christoph, Hurth, Tobias
Lenguaje:eng
Publicado: 2005
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.22323/1.021.0275
http://cds.cern.ch/record/913931
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author Asatrian, Hrachia M.
Hovhannisyan, Artyom
Poghosyan, Vahagn
Greub, Christoph
Hurth, Tobias
author_facet Asatrian, Hrachia M.
Hovhannisyan, Artyom
Poghosyan, Vahagn
Greub, Christoph
Hurth, Tobias
author_sort Asatrian, Hrachia M.
collection CERN
description The present NLL prediction for the decay rate of the rare inclusive process $\bar B \to X_s \gamma$ 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 $\bar B \to X_s \gamma$ to possible new degrees of freedom beyond the SM. We also give a brief status report of the NNLL calculation.
id cern-913931
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2005
record_format invenio
spelling cern-9139312023-03-14T20:06:44Zdoi:10.22323/1.021.0275http://cds.cern.ch/record/913931engAsatrian, Hrachia M.Hovhannisyan, ArtyomPoghosyan, VahagnGreub, ChristophHurth, TobiasTowards the NNLL precision in $\bar B \to X_s \gamma$Particle Physics - PhenomenologyThe present NLL prediction for the decay rate of the rare inclusive process $\bar B \to X_s \gamma$ 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 $\bar B \to X_s \gamma$ to possible new degrees of freedom beyond the SM. We also give a brief status report of the NNLL calculation.The present NLL prediction for the decay rate of the rare inclusive process $\bar B \to X_s \gamma$ 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 $\bar B \to X_s \gamma$ to possible new degrees of freedom beyond the SM. We also give a brief status report of the NNLL calculation.hep-ph/0512097CERN-PH-TH-2005-233SLAC-PUB-11586CERN-PH-TH-2005-233SLAC-PUB-11586oai:cds.cern.ch:9139312005-12-08
spellingShingle Particle Physics - Phenomenology
Asatrian, Hrachia M.
Hovhannisyan, Artyom
Poghosyan, Vahagn
Greub, Christoph
Hurth, Tobias
Towards the NNLL precision in $\bar B \to X_s \gamma$
title Towards the NNLL precision in $\bar B \to X_s \gamma$
title_full Towards the NNLL precision in $\bar B \to X_s \gamma$
title_fullStr Towards the NNLL precision in $\bar B \to X_s \gamma$
title_full_unstemmed Towards the NNLL precision in $\bar B \to X_s \gamma$
title_short Towards the NNLL precision in $\bar B \to X_s \gamma$
title_sort towards the nnll precision in $\bar b \to x_s \gamma$
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.22323/1.021.0275
http://cds.cern.ch/record/913931
work_keys_str_mv AT asatrianhrachiam towardsthennllprecisioninbarbtoxsgamma
AT hovhannisyanartyom towardsthennllprecisioninbarbtoxsgamma
AT poghosyanvahagn towardsthennllprecisioninbarbtoxsgamma
AT greubchristoph towardsthennllprecisioninbarbtoxsgamma
AT hurthtobias towardsthennllprecisioninbarbtoxsgamma

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