Measurement of CP violation in B0→ D∗±D∓ decays
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13130_2020_Article_12680.pdf
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Author(s)
Aaij, R.
Abellán Beteta, C.
Ackernley, T.
Adeva, B.
Adinolfi, M.
Afsharnia, H.
Aidala, C. A
Aiola, S.
Ajaltouni, Z.
Akar, S.
Date Issued
March 25, 2020
Publisher
Springer Berlin Heidelberg
Citation
Journal of High Energy Physics. 2020 Mar 25;2020(3):147
Version
Final published version
Abstract
Abstract
The decay-time-dependent CP asymmetry in B0→ D∗±D∓ decays is mea- sured using a data set corresponding to an integrated luminosity of 9 fb−1 recorded by the LHCb detector in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV. The CP parameters are measured asSD∗D=−0.861±0.077stat±0.019syst,ΔSD∗D=0.019±0.075stat±0.012syst,CD∗D=−0.059±0.092stat±0.020syst,ΔCD∗D=−0.031±0.092stat±0.016syst,AD∗D=0.008±0.014stat±0.006syst.$$ {\displaystyle \begin{array}{c}{S}_{D\ast D}=-0.861\pm 0.077\left(\mathrm{stat}\right)\pm 0.019\left(\mathrm{syst}\right),\\ {}\varDelta {S}_{D\ast D}=0.019\pm 0.075\left(\mathrm{stat}\right)\pm 0.012\left(\mathrm{syst}\right),\\ {}{C}_{D\ast D}=-0.059\pm 0.092\left(\mathrm{stat}\right)\pm 0.020\left(\mathrm{syst}\right),\\ {}{\varDelta C}_{D\ast D}=-0.031\pm 0.092\left(\mathrm{stat}\right)\pm 0.016\left(\mathrm{syst}\right),\\ {}{\mathcal{A}}_{D\ast D}=\kern0.75em 0.008\pm 0.014\left(\mathrm{stat}\right)\pm 0.006\left(\mathrm{syst}\right).\end{array}} $$
The analysis provides the most precise single measurement of CP violation in this decay channel to date. All parameters are consistent with their current world average values.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1007/JHEP03(2020)147
