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Time-dependent $CP$-violation measurements in $B\rightarrow DX$ decays at LHCb

Measurements of the time-dependent $C\!P$-violation observables in $B^0\!\to D^\mp\pi^\pm$ and $B^0_s\!\to D_s^\mp K^\pm$ decys are reported. The decays are reconstructed in a dataset collected with the LHCb experiment in $pp$ collisions at centre-of-mass energies of $7$ and $8\,\text{TeV}$ correspo...

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Autor principal: Birnkraut, Alex
Lenguaje:eng
Publicado: SISSA 2019
Materias:
Acceso en línea:https://dx.doi.org/10.22323/1.340.0246
http://cds.cern.ch/record/2703020
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author Birnkraut, Alex
author_facet Birnkraut, Alex
author_sort Birnkraut, Alex
collection CERN
description Measurements of the time-dependent $C\!P$-violation observables in $B^0\!\to D^\mp\pi^\pm$ and $B^0_s\!\to D_s^\mp K^\pm$ decys are reported. The decays are reconstructed in a dataset collected with the LHCb experiment in $pp$ collisions at centre-of-mass energies of $7$ and $8\,\text{TeV}$ corresponding to an integrated luminosity of $ 3\,\text{fb}^{-1}$. For $B^0\!\to D^\mp\pi^\pm$ decays, the $C\!P$-observables are measured to be $S_f = 0.058 \pm 0.020 \pm 0.011 $ and $S_{\bar{f}} = 0.038 \pm 0.020 \pm 0.007$. For $B^0_s\!\to D_s^\mp K^\pm$ decays, $C_f = 0.730 \pm 0.142 \pm 0.045 $, $S_f = -0.519 \pm 0.202 \pm 0.070 $, $S_{\bar{f}} = -0.489 \pm 0.196 \pm 0.068$, $A_f^{\Delta\Gamma} = 0.387 \pm 0.277 \pm 0.153$ and $A_{\bar{f}}^{\Delta\Gamma} = 0.308 \pm 0.275 \pm 0.152$ are determined, where the first uncertainties are statistical and the second systematic. Using these observables the CKM angle $\gamma$ is constrained at $68\ \%$ CL to be $[5,86]{}^{\circ}$ and $\left(128^{+17}_{-22}\right)^{\circ}$ modulo $180^\circ$ for $B^0\!\to D^\mp\pi^\pm$ and $B^0_s\!\to D_s^\mp K^\pm$ decays, respectively.
id oai-inspirehep.net-1748901
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2019
publisher SISSA
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spelling oai-inspirehep.net-17489012022-08-10T12:20:10Zdoi:10.22323/1.340.0246http://cds.cern.ch/record/2703020engBirnkraut, AlexTime-dependent $CP$-violation measurements in $B\rightarrow DX$ decays at LHCbParticle Physics - ExperimentMeasurements of the time-dependent $C\!P$-violation observables in $B^0\!\to D^\mp\pi^\pm$ and $B^0_s\!\to D_s^\mp K^\pm$ decys are reported. The decays are reconstructed in a dataset collected with the LHCb experiment in $pp$ collisions at centre-of-mass energies of $7$ and $8\,\text{TeV}$ corresponding to an integrated luminosity of $ 3\,\text{fb}^{-1}$. For $B^0\!\to D^\mp\pi^\pm$ decays, the $C\!P$-observables are measured to be $S_f = 0.058 \pm 0.020 \pm 0.011 $ and $S_{\bar{f}} = 0.038 \pm 0.020 \pm 0.007$. For $B^0_s\!\to D_s^\mp K^\pm$ decays, $C_f = 0.730 \pm 0.142 \pm 0.045 $, $S_f = -0.519 \pm 0.202 \pm 0.070 $, $S_{\bar{f}} = -0.489 \pm 0.196 \pm 0.068$, $A_f^{\Delta\Gamma} = 0.387 \pm 0.277 \pm 0.153$ and $A_{\bar{f}}^{\Delta\Gamma} = 0.308 \pm 0.275 \pm 0.152$ are determined, where the first uncertainties are statistical and the second systematic. Using these observables the CKM angle $\gamma$ is constrained at $68\ \%$ CL to be $[5,86]{}^{\circ}$ and $\left(128^{+17}_{-22}\right)^{\circ}$ modulo $180^\circ$ for $B^0\!\to D^\mp\pi^\pm$ and $B^0_s\!\to D_s^\mp K^\pm$ decays, respectively.SISSAoai:inspirehep.net:17489012019
spellingShingle Particle Physics - Experiment
Birnkraut, Alex
Time-dependent $CP$-violation measurements in $B\rightarrow DX$ decays at LHCb
title Time-dependent $CP$-violation measurements in $B\rightarrow DX$ decays at LHCb
title_full Time-dependent $CP$-violation measurements in $B\rightarrow DX$ decays at LHCb
title_fullStr Time-dependent $CP$-violation measurements in $B\rightarrow DX$ decays at LHCb
title_full_unstemmed Time-dependent $CP$-violation measurements in $B\rightarrow DX$ decays at LHCb
title_short Time-dependent $CP$-violation measurements in $B\rightarrow DX$ decays at LHCb
title_sort time-dependent $cp$-violation measurements in $b\rightarrow dx$ decays at lhcb
topic Particle Physics - Experiment
url https://dx.doi.org/10.22323/1.340.0246
http://cds.cern.ch/record/2703020
work_keys_str_mv AT birnkrautalex timedependentcpviolationmeasurementsinbrightarrowdxdecaysatlhcb