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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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Lenguaje: | eng |
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2016
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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 |