Measuring the photon polarization in b->s gamma using the B-> K*e+e- decay channel

The decay B0 -> K* e+e- proceeds via electroweak penguin and box diagrams. The low e+ e- mass region is dominated by the photon term and an analysis of the angular variables allows to test the photon helicity which is expected to be predominantly left-handed. For an integrated luminosity of 2 fb-...

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Detalles Bibliográficos
Autores principales: Lefrançois, J, Schune, M H
Lenguaje:eng
Publicado: 2009
Materias:
Particle Physics - Experiment
Acceso en línea:http://cds.cern.ch/record/1179865
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author Lefrançois, J
Schune, M H
author_facet Lefrançois, J
Schune, M H
author_sort Lefrançois, J
collection CERN
description The decay B0 -> K* e+e- proceeds via electroweak penguin and box diagrams. The low e+ e- mass region is dominated by the photon term and an analysis of the angular variables allows to test the photon helicity which is expected to be predominantly left-handed. For an integrated luminosity of 2 fb-1 the expected accuracy on the fraction of wrongly polarized photons is of the order of 0.1 assuming a background over signal ratio of 1.
id cern-1179865
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2009
record_format invenio
spelling cern-11798652019-09-30T06:29:59Zhttp://cds.cern.ch/record/1179865engLefrançois, JSchune, M HMeasuring the photon polarization in b->s gamma using the B-> K*e+e- decay channelParticle Physics - ExperimentThe decay B0 -> K* e+e- proceeds via electroweak penguin and box diagrams. The low e+ e- mass region is dominated by the photon term and an analysis of the angular variables allows to test the photon helicity which is expected to be predominantly left-handed. For an integrated luminosity of 2 fb-1 the expected accuracy on the fraction of wrongly polarized photons is of the order of 0.1 assuming a background over signal ratio of 1.LHCb-PUB-2009-008CERN-LHCb-PUB-2009-008LHCb-INT-2009-007oai:cds.cern.ch:11798652009-06-05
spellingShingle Particle Physics - Experiment
Lefrançois, J
Schune, M H
Measuring the photon polarization in b->s gamma using the B-> K*e+e- decay channel
title Measuring the photon polarization in b->s gamma using the B-> K*e+e- decay channel
title_full Measuring the photon polarization in b->s gamma using the B-> K*e+e- decay channel
title_fullStr Measuring the photon polarization in b->s gamma using the B-> K*e+e- decay channel
title_full_unstemmed Measuring the photon polarization in b->s gamma using the B-> K*e+e- decay channel
title_short Measuring the photon polarization in b->s gamma using the B-> K*e+e- decay channel
title_sort measuring the photon polarization in b->s gamma using the b-> k*e+e- decay channel
topic Particle Physics - Experiment
url http://cds.cern.ch/record/1179865
work_keys_str_mv AT lefrancoisj measuringthephotonpolarizationinbsgammausingthebkeedecaychannel
AT schunemh measuringthephotonpolarizationinbsgammausingthebkeedecaychannel

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