Search for $CP$ violation in $D_s^+\to K_S^0 \pi^+$, $D^+\to K_S^0 K^+$ and $D^+\to \phi \pi^+$ decays

Aaij, Roel; Abellán Beteta, Carlos; Adeva, Bernardo; Adinolfi, Marco; Aidala, Christine Angela; Ajaltouni, Ziad; Akar, Simon; Albicocco, Pietro; Albrecht, Johannes; Alessio, Federico

doi:10.1103/PhysRevLett.122.191803

Search for $CP$ violation in $D_s^+\to K_S^0 \pi^+$ , $D^+\to K_S^0 K^+$ and $D^+\to \phi \pi^+$ decays

LHCb

Collaboration

Mar 4, 2019

11 pages

Published in:

Phys.Rev.Lett. 122 (2019) 19, 191803

Published: May 17, 2019

e-Print:

1903.01150 [hep-ex]

DOI:

10.1103/PhysRevLett.122.191803

PDG:

\mathit A_{\mathit CP}({{\mathit \phi}}{{\mathit \pi}^{\pm}}

) in

{{\mathit D}^{\pm}}

\rightarrow

{{\mathit \phi}}{{\mathit \pi}^{\pm}}

Report number:

LHCb-PAPER-2019-002,
CERN-EP-2019-027

Experiments:

CERN-LHC-LHCb

View in:

reference search23 citations

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Abstract: (APS)

A search for charge-parity (CP) violation in Cabibbo-suppressed Ds+→KS0π+, D+→KS0K+, and D+→ϕπ+ decays is reported using proton-proton collision data, corresponding to an integrated luminosity of 3.8 fb-1, collected at a center-of-mass energy of 13 TeV with the LHCb detector. High-yield samples of kinematically and topologically similar Cabibbo-favored D(s)+ decays are analyzed to subtract nuisance asymmetries due to production and detection effects, including those induced by CP violation in the neutral kaon system. The results areACP(Ds+→KS0π+)=(1.3±1.9±0.5)×10-3,ACP(D+→KS0K+)=(-0.09±0.65±0.48)×10-3,ACP(D+→ϕπ+)=(0.05±0.42±0.29)×10-3,where the first uncertainties are statistical and the second systematic. They are the most precise measurements of these quantities to date, and are consistent with CP symmetry. A combination with previous LHCb measurements, based on data collected at 7 and 8 TeV, is also reported.

Note:

All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2019-002.html

Elementary Particles and Fields
p p: scattering
p p: colliding beams
D/s+: hadronic decay
D+: hadronic decay
D/s+: rare decay
D+: rare decay
CP: violation
asymmetry: CP
phantom

References(48)

Figures(0)

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