Measurement of $CP$ violation in $B^0 \!\rightarrow D^+ D^-$ decays - INSPIRE

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Measurement of $CP$ violation in $B^0 \!\rightarrow D^+ D^-$ decays

LHCb

Collaboration

Aug 23, 2016

10 pages

Published in:

Phys.Rev.Lett. 117 (2016) 26, 261801

Published: Dec 23, 2016

e-Print:

1608.06620 [hep-ex]

DOI:

10.1103/PhysRevLett.117.261801

PDG:

\mathit C_{{{\mathit D}^{+}} {{\mathit D}^{-}} }

{{\mathit B}^{0}}

\rightarrow

{{\mathit D}^{+}}{{\mathit D}^{-}}

Report number:

LHCB-PAPER-2016-037,
CERN-EP-2016-203

Experiments:

CERN-LHC-LHCb

View in:

reference search43 citations

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Abstract: (APS)

The CP violation observables S and C in the decay channel B0→D+D- are determined from a sample of proton-proton collisions at center-of-mass energies of 7 and 8 TeV, collected by the LHCb experiment and corresponding to an integrated luminosity of 3 fb-1. The observable S describes CP violation in the interference between mixing and the decay amplitude, and C parametrizes direct CP violation in the decay. The following values are obtained from a flavor-tagged, decay-time-dependent analysis: S=-0.54-0.16+0.17(stat)±0.05(syst), C=0.26-0.17+0.18(stat)±0.02(syst). These values provide evidence for CP violation at a significance level of 4.0 standard deviations. The phase shift due to higher-order standard model corrections is constrained to a small value of Δϕ=-0.16-0.21+0.19 rad.

Note:

All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2016-037.html

p p: scattering
p p: colliding beams
CP: violation
asymmetry: CP
B0: hadronic decay
higher-order
interference
phantom
B0 anti-B0: mixing
LHC-B

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