Evidence for CP Violation in Time- Integrated D-0 -> h(-)h(+) Decay Rates

LHCb collaboration

doi:10.1103/PhysRevLett.108.111602

Evidence for CP Violation in Time- Integrated D-0 -> h(-)h(+) Decay Rates

LHCb collaboration

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

A search for time-integrated CP violation in D-0 -> h(-)h(+) (h = K, pi) decays is presented using 0.62 fb(-1) of data collected by LHCb in 2011. The flavor of the charm meson is determined by the charge of the slow pion in the D*(+) -> D-0 pi(+) and D*(-) -> (D) over bar (0)pi(-) decay chains. The difference in CP asymmetry between D-0 -> K-K+ and D-0 -> pi(-)pi(+), Delta A(CP) A(CP)(K-K+) - A(CP)(pi(-)pi(+)), is measured to be [-0.82 +/- 0.21(stat) +/- 0.11(syst) +/-]%. This differs from the hypothesis of CP conservation by 3.5 standard deviations.

Original language	English
Article number	111602
Number of pages	8
Journal	Physical Review Letters
Volume	108
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevLett.108.111602
Publication status	Published - 12 Mar 2012
Externally published	Yes

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10.1103/PhysRevLett.108.111602Licence: CC BY

1 Erratum / corrigendum / retractions

Evidence for CP Violation in Time-Integrated D-0 -> h(-)h(+) decay rates (vol 108, 111602, 2012)
LHCb collaboration, 21 Mar 2012, In: Physical Review Letters. 108, 12, 2 p., 129903.
Research output: Contribution to journal › Erratum / corrigendum / retractions › Academic

Open Access

Cite this

@article{6db8472ebb44484098104ee3443fbdaf,

title = "Evidence for CP Violation in Time- Integrated D-0 -> h(-)h(+) Decay Rates",

abstract = "A search for time-integrated CP violation in D-0 -> h(-)h(+) (h = K, pi) decays is presented using 0.62 fb(-1) of data collected by LHCb in 2011. The flavor of the charm meson is determined by the charge of the slow pion in the D*(+) -> D-0 pi(+) and D*(-) -> (D) over bar (0)pi(-) decay chains. The difference in CP asymmetry between D-0 -> K-K+ and D-0 -> pi(-)pi(+), Delta A(CP) A(CP)(K-K+) - A(CP)(pi(-)pi(+)), is measured to be [-0.82 +/- 0.21(stat) +/- 0.11(syst) +/-]%. This differs from the hypothesis of CP conservation by 3.5 standard deviations.",

author = "R. Aaij and C.A. Beteta and B. Adeva and M. Adinolfi and C. Adrover and A. Affolder and Z. Ajaltouni and J. Albrecht and F. Alessio and M. Alexander and G. Alkhazov and P.A. Cartelle and A.A. Alves and S. Amato and Y. Amhis and J. Anderson and R.B. Appleby and O.A. Gutierrez and F. Archilli and L. Arrabito and A. Artamonov and M. Artuso and E. Aslanides and G. Auriemma and S. Bachmann and J.J. Back and D.S. Bailey and V. Balagura and W. Baldini and R.J. Barlow and C. Barschel and S. Barsuk and W. Barter and A. Bates and C. Bauer and T. Bauer and A. Bay and I. Bediaga and S. Belogurov and K. Belous and I. Belyaev and E. Ben-Haim and M. Benayoun and G. Bencivenni and S. Benson and J. Benton and R. Bernet and M.O. Bettler and {van Beuzekom}, M. and {van den Brand}, J. and {LHCb collaboration}",

year = "2012",

month = mar,

day = "12",

doi = "10.1103/PhysRevLett.108.111602",

language = "English",

volume = "108",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

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TY - JOUR

T1 - Evidence for CP Violation in Time- Integrated D-0 -> h(-)h(+) Decay Rates

AU - Aaij, R.

AU - Beteta, C.A.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Adrover, C.

AU - Affolder, A.

AU - Ajaltouni, Z.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Alkhazov, G.

AU - Cartelle, P.A.

AU - Alves, A.A.

AU - Amato, S.

AU - Amhis, Y.

AU - Anderson, J.

AU - Appleby, R.B.

AU - Gutierrez, O.A.

AU - Archilli, F.

AU - Arrabito, L.

AU - Artamonov, A.

AU - Artuso, M.

AU - Aslanides, E.

AU - Auriemma, G.

AU - Bachmann, S.

AU - Back, J.J.

AU - Bailey, D.S.

AU - Balagura, V.

AU - Baldini, W.

AU - Barlow, R.J.

AU - Barschel, C.

AU - Barsuk, S.

AU - Barter, W.

AU - Bates, A.

AU - Bauer, C.

AU - Bauer, T.

AU - Bay, A.

AU - Bediaga, I.

AU - Belogurov, S.

AU - Belous, K.

AU - Belyaev, I.

AU - Ben-Haim, E.

AU - Benayoun, M.

AU - Bencivenni, G.

AU - Benson, S.

AU - Benton, J.

AU - Bernet, R.

AU - Bettler, M.O.

AU - van Beuzekom, M.

AU - van den Brand, J.

AU - LHCb collaboration

PY - 2012/3/12

Y1 - 2012/3/12

N2 - A search for time-integrated CP violation in D-0 -> h(-)h(+) (h = K, pi) decays is presented using 0.62 fb(-1) of data collected by LHCb in 2011. The flavor of the charm meson is determined by the charge of the slow pion in the D*(+) -> D-0 pi(+) and D*(-) -> (D) over bar (0)pi(-) decay chains. The difference in CP asymmetry between D-0 -> K-K+ and D-0 -> pi(-)pi(+), Delta A(CP) A(CP)(K-K+) - A(CP)(pi(-)pi(+)), is measured to be [-0.82 +/- 0.21(stat) +/- 0.11(syst) +/-]%. This differs from the hypothesis of CP conservation by 3.5 standard deviations.

AB - A search for time-integrated CP violation in D-0 -> h(-)h(+) (h = K, pi) decays is presented using 0.62 fb(-1) of data collected by LHCb in 2011. The flavor of the charm meson is determined by the charge of the slow pion in the D*(+) -> D-0 pi(+) and D*(-) -> (D) over bar (0)pi(-) decay chains. The difference in CP asymmetry between D-0 -> K-K+ and D-0 -> pi(-)pi(+), Delta A(CP) A(CP)(K-K+) - A(CP)(pi(-)pi(+)), is measured to be [-0.82 +/- 0.21(stat) +/- 0.11(syst) +/-]%. This differs from the hypothesis of CP conservation by 3.5 standard deviations.

U2 - 10.1103/PhysRevLett.108.111602

DO - 10.1103/PhysRevLett.108.111602

M3 - Article

SN - 0031-9007

VL - 108

JO - Physical Review Letters

JF - Physical Review Letters

IS - 11

M1 - 111602

ER -

Evidence for CP Violation in Time- Integrated D-0 -> h(-)h(+) Decay Rates

Abstract

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Research output

Evidence for CP Violation in Time-Integrated D-0 -> h(-)h(+) decay rates (vol 108, 111602, 2012)

Cite this