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Bs semileptonic asymmetry at LHCb

When neutral $B^{0}_{s,d}$ mesons evolve in time they can change into their own antiparticles. In this mixing process CP symmetry is not necessarily conserved, as the probability for a $B^{0}$ meson to change into a $\bar{B}^{0}$ meson can be different from the probability for the reverse process. T...

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Autor principal: Dufour, Laurent
Lenguaje:eng
Publicado: 2016
Acceso en línea:http://cds.cern.ch/record/2149390
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author Dufour, Laurent
author_facet Dufour, Laurent
author_sort Dufour, Laurent
collection CERN
description When neutral $B^{0}_{s,d}$ mesons evolve in time they can change into their own antiparticles. In this mixing process CP symmetry is not necessarily conserved, as the probability for a $B^{0}$ meson to change into a $\bar{B}^{0}$ meson can be different from the probability for the reverse process. The CP violation in the $B^{0}_{s}$ system as measured using semileptonic decays, defined as $a^{s}_{sl}$, is very small according to the Standard Model. However, earlier measurements of the semileptonic mixing asymmetry in both the $B_s^{0}$ and $B_d^{0}$ systems have shown a $3 \sigma$ deviation with respect to the Standard Model value. A measurement of $a^{s}_{sl}$ performed using $1 \text{fb}^{-1}$ of data collected at the LHCb detector is presented, together with an outlook to the updated $3 \text{fb}^{-1}$ result.
id cern-2149390
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2016
record_format invenio
spelling cern-21493902019-09-30T06:29:59Zhttp://cds.cern.ch/record/2149390engDufour, LaurentBs semileptonic asymmetry at LHCbWhen neutral $B^{0}_{s,d}$ mesons evolve in time they can change into their own antiparticles. In this mixing process CP symmetry is not necessarily conserved, as the probability for a $B^{0}$ meson to change into a $\bar{B}^{0}$ meson can be different from the probability for the reverse process. The CP violation in the $B^{0}_{s}$ system as measured using semileptonic decays, defined as $a^{s}_{sl}$, is very small according to the Standard Model. However, earlier measurements of the semileptonic mixing asymmetry in both the $B_s^{0}$ and $B_d^{0}$ systems have shown a $3 \sigma$ deviation with respect to the Standard Model value. A measurement of $a^{s}_{sl}$ performed using $1 \text{fb}^{-1}$ of data collected at the LHCb detector is presented, together with an outlook to the updated $3 \text{fb}^{-1}$ result. Poster-2016-532oai:cds.cern.ch:21493902016-03-02
spellingShingle Dufour, Laurent
Bs semileptonic asymmetry at LHCb
title Bs semileptonic asymmetry at LHCb
title_full Bs semileptonic asymmetry at LHCb
title_fullStr Bs semileptonic asymmetry at LHCb
title_full_unstemmed Bs semileptonic asymmetry at LHCb
title_short Bs semileptonic asymmetry at LHCb
title_sort bs semileptonic asymmetry at lhcb
url http://cds.cern.ch/record/2149390
work_keys_str_mv AT dufourlaurent bssemileptonicasymmetryatlhcb