Measurement of the Difference of Time-Integrated CP Asymmetries in D0 → K-K+ and D0 → π-π + Decays

LHCb Collaboration

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

A search for CP violation in D0→K-K+ and D0→π-π+ decays is performed using pp collision data, corresponding to an integrated luminosity of 3 fb-1, collected using the LHCb detector at center-of-mass energies of 7 and 8 TeV. The flavor of the charm meson is inferred from the charge of the pion in D∗+→D0π+ and D∗-→D0π- decays. The difference between the CP asymmetries in D0→K-K+ and D0→π-π+ decays, ΔACP≡ACP(K-K+)-ACP(π-π+), is measured to be [-0.10±0.08(stat)±0.03(syst)]%. This is the most precise measurement of a time-integrated CP asymmetry in the charm sector from a single experiment.

Original languageEnglish (US)
Article number184601
JournalPhysical Review Letters
Volume116
Issue number19
DOIs
StatePublished - May 9 2016

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Mesons
asymmetry
decay
CP violation
center of mass
pions
sectors
mesons
luminosity
collisions
detectors
energy

ASJC Scopus subject areas

  • Medicine(all)
  • Physics and Astronomy(all)

Cite this

Measurement of the Difference of Time-Integrated CP Asymmetries in D0 → K-K+ and D0 → π-π + Decays. / LHCb Collaboration.

In: Physical Review Letters, Vol. 116, No. 19, 184601, 09.05.2016.

Research output: Contribution to journalArticle

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abstract = "A search for CP violation in D0→K-K+ and D0→π-π+ decays is performed using pp collision data, corresponding to an integrated luminosity of 3 fb-1, collected using the LHCb detector at center-of-mass energies of 7 and 8 TeV. The flavor of the charm meson is inferred from the charge of the pion in D∗+→D0π+ and D∗-→D0π- decays. The difference between the CP asymmetries in D0→K-K+ and D0→π-π+ decays, ΔACP≡ACP(K-K+)-ACP(π-π+), is measured to be [-0.10±0.08(stat)±0.03(syst)]{\%}. This is the most precise measurement of a time-integrated CP asymmetry in the charm sector from a single experiment.",
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AU - Aaij, R.

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AU - Adeva, B.

AU - Adinolfi, M.

AU - Affolder, A.

AU - Ajaltouni, Z.

AU - Akar, S.

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AU - Baldini, W.

AU - Barlow, R. J.

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