Search for CP Violation in Ds+ → KS0 π+, D+ → KS0 K+, and D+ →φπ+ Decays

LHCb Collaboration, Alexander Rudolfovich Wagner

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish
Article number191803
JournalPhysical Review Letters
Volume122
Issue number19
DOIs
Publication statusPublished - 17 May 2019

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parity
decay
protons
center of mass
luminosity
asymmetry
collisions
detectors
symmetry
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Search for CP Violation in Ds+ → KS0 π+, D+ → KS0 K+, and D+ →φπ+ Decays. / LHCb Collaboration ; Wagner, Alexander Rudolfovich.

In: Physical Review Letters, Vol. 122, No. 19, 191803, 17.05.2019.

Research output: Contribution to journalArticle

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abstract = "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.",
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AU - Albrecht, J.

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AU - Alves, A. A.

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AU - Amhis, Y.

AU - An, L.

AU - Anderlini, L.

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AU - Arzymatov, K.

AU - Aslanides, E.

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AU - Bachmann, S.

AU - Back, J. J.

AU - Baker, S.

AU - Balagura, V.

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AU - Baranov, A.

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AU - Barsuk, S.

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AU - Bartolini, M.

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AU - Batozskaya, V.

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AU - Battig, A.

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AU - Wagner, Alexander Rudolfovich

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N2 - 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.

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