Measurements of Indirect CP Asymmetries in D-0 -> K-K+ and D-0 -> pi(-)pi(+) Decays

LHCb collaboration

doi:10.1103/PhysRevLett.112.041801

Measurements of Indirect CP Asymmetries in D-0 -> K-K+ and D-0 -> pi(-)pi(+) Decays

LHCb collaboration

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

Abstract

A study of indirect CP violation in D-0 mesons through the determination of the parameter A(Gamma) is presented using a data sample of pp collisions, corresponding to an integrated luminosity of 1.0 fb(-1), collected with the LHCb detector and recorded at the center-of-mass energy of 7 TeV at the LHC. The parameter A(Gamma) is the asymmetry of the effective lifetimes measured in decays of D-0 and (D) over bar (0) mesons to the CP eigenstates K-K+ and pi(-)pi(+). Fits to the data sample yield A(Gamma)(KK) = (-0.35 +/- 0.62 +/- 0.12) x 10(-3) and A(Gamma)(pi pi) = (0.33 +/- 1.06 +/- 0.14) x 10(-3), where the first uncertainties are statistical and the second systematic. The results represent the world''s best measurements of these quantities. They show no difference in A(Gamma) between the two final states and no indication of CP violation.

Original language	English
Article number	041801
Number of pages	9
Journal	Physical Review Letters
Volume	112
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevLett.112.041801
Publication status	Published - 31 Jan 2014
Externally published	Yes

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10.1103/PhysRevLett.112.041801Licence: CC BY

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@article{d3a49b5e90cc4aeb8d778c0a6263091f,

title = "Measurements of Indirect CP Asymmetries in D-0 -> K-K+ and D-0 -> pi(-)pi(+) Decays",

abstract = "A study of indirect CP violation in D-0 mesons through the determination of the parameter A(Gamma) is presented using a data sample of pp collisions, corresponding to an integrated luminosity of 1.0 fb(-1), collected with the LHCb detector and recorded at the center-of-mass energy of 7 TeV at the LHC. The parameter A(Gamma) is the asymmetry of the effective lifetimes measured in decays of D-0 and (D) over bar (0) mesons to the CP eigenstates K-K+ and pi(-)pi(+). Fits to the data sample yield A(Gamma)(KK) = (-0.35 +/- 0.62 +/- 0.12) x 10(-3) and A(Gamma)(pi pi) = (0.33 +/- 1.06 +/- 0.14) x 10(-3), where the first uncertainties are statistical and the second systematic. The results represent the world''s best measurements of these quantities. They show no difference in A(Gamma) between the two final states and no indication of CP violation.",

author = "R. Aaij 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 S. Ali and G. Alkhazov and P.A. Cartelle and A.A. Alves and S. Amato and S. Amerio and Y. Amhis and L. Anderlini and J. Anderson and R. Andreassen and J.E. Andrews and R.B. Appleby and O.A. Gutierrez and F. Archilli and A. Artamonov and M. Artuso and E. Aslanides and G. Auriemma and M. Baalouch and S. Bachmann and J.J. Back and A. Badalov and C. Baesso and V. Balagura and W. Baldini and R.J. Barlow and C. Barschel and S. Barsuk and W. Barter and T. Bauer and A. Bay and J. Beddow and F. Bedeschi and I. Bediaga and S. Belogurov and K. Belous and I. Belyaev and E. Ben-Haim and G. Bencivenni and S. Benson and {van den Brand}, J. and {LHCb collaboration}",

year = "2014",

month = jan,

day = "31",

doi = "10.1103/PhysRevLett.112.041801",

language = "English",

volume = "112",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "4",

}

TY - JOUR

T1 - Measurements of Indirect CP Asymmetries in D-0 -> K-K+ and D-0 -> pi(-)pi(+) Decays

AU - Aaij, R.

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 - Ali, S.

AU - Alkhazov, G.

AU - Cartelle, P.A.

AU - Alves, A.A.

AU - Amato, S.

AU - Amerio, S.

AU - Amhis, Y.

AU - Anderlini, L.

AU - Anderson, J.

AU - Andreassen, R.

AU - Andrews, J.E.

AU - Appleby, R.B.

AU - Gutierrez, O.A.

AU - Archilli, F.

AU - Artamonov, A.

AU - Artuso, M.

AU - Aslanides, E.

AU - Auriemma, G.

AU - Baalouch, M.

AU - Bachmann, S.

AU - Back, J.J.

AU - Badalov, A.

AU - Baesso, C.

AU - Balagura, V.

AU - Baldini, W.

AU - Barlow, R.J.

AU - Barschel, C.

AU - Barsuk, S.

AU - Barter, W.

AU - Bauer, T.

AU - Bay, A.

AU - Beddow, J.

AU - Bedeschi, F.

AU - Bediaga, I.

AU - Belogurov, S.

AU - Belous, K.

AU - Belyaev, I.

AU - Ben-Haim, E.

AU - Bencivenni, G.

AU - Benson, S.

AU - van den Brand, J.

AU - LHCb collaboration

PY - 2014/1/31

Y1 - 2014/1/31

N2 - A study of indirect CP violation in D-0 mesons through the determination of the parameter A(Gamma) is presented using a data sample of pp collisions, corresponding to an integrated luminosity of 1.0 fb(-1), collected with the LHCb detector and recorded at the center-of-mass energy of 7 TeV at the LHC. The parameter A(Gamma) is the asymmetry of the effective lifetimes measured in decays of D-0 and (D) over bar (0) mesons to the CP eigenstates K-K+ and pi(-)pi(+). Fits to the data sample yield A(Gamma)(KK) = (-0.35 +/- 0.62 +/- 0.12) x 10(-3) and A(Gamma)(pi pi) = (0.33 +/- 1.06 +/- 0.14) x 10(-3), where the first uncertainties are statistical and the second systematic. The results represent the world''s best measurements of these quantities. They show no difference in A(Gamma) between the two final states and no indication of CP violation.

AB - A study of indirect CP violation in D-0 mesons through the determination of the parameter A(Gamma) is presented using a data sample of pp collisions, corresponding to an integrated luminosity of 1.0 fb(-1), collected with the LHCb detector and recorded at the center-of-mass energy of 7 TeV at the LHC. The parameter A(Gamma) is the asymmetry of the effective lifetimes measured in decays of D-0 and (D) over bar (0) mesons to the CP eigenstates K-K+ and pi(-)pi(+). Fits to the data sample yield A(Gamma)(KK) = (-0.35 +/- 0.62 +/- 0.12) x 10(-3) and A(Gamma)(pi pi) = (0.33 +/- 1.06 +/- 0.14) x 10(-3), where the first uncertainties are statistical and the second systematic. The results represent the world''s best measurements of these quantities. They show no difference in A(Gamma) between the two final states and no indication of CP violation.

U2 - 10.1103/PhysRevLett.112.041801

DO - 10.1103/PhysRevLett.112.041801

M3 - Article

SN - 0031-9007

VL - 112

JO - Physical Review Letters

JF - Physical Review Letters

IS - 4

M1 - 041801

ER -

Measurements of Indirect CP Asymmetries in D-0 -> K-K+ and D-0 -> pi(-)pi(+) Decays

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