Measurement of indirect CP asymmetries in D0 → K−K+ and D0 → π−π+ decays using semileptonic B decays

LHCb Collaboration; R. Aaij; B. Adeva; M. Adinolfi; A. Affolder; Z. Ajaltouni; S. Akar; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G. Alkhazov; P. Alvarez Cartelle; A. A. Alves; S. Amato; S. Amerio; Y. Amhis; L. An; L. Anderlini; J. Anderson; R. Andreassen; M. Andreotti; J. E. Andrews; R. B. Appleby; O. Aquines Gutierrez; F. Archilli; A. Artamonov; M. Artuso; E. Aslanides; G. Auriemma; M. Baalouch; S. Bachmann; J. J. Back; A. Badalov; C. Baesso; W. Baldini; R. J. Barlow; C. Barschel; S. Barsuk; S. Bifani; N. Farley; P. Griffith; P. Ilten; I. R. Kenyon; C. Lazzeroni; A. Mazurov; J. McCarthy; C. J. Parkinson; L. Pescatore; D. Popov; N. K. Watson

doi:10.1007/JHEP04(2015)043

Measurement of indirect CP asymmetries in D⁰ → K⁻K⁺ and D⁰ → π⁻π⁺ decays using semileptonic B decays

LHCb Collaboration, R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A. A. Alves, S. Amato, S. Amerio, Y. Amhis, L. An, L. Anderlini, J. AndersonR. Andreassen, M. Andreotti, J. E. Andrews, R. B. Appleby, O. Aquines Gutierrez, F. Archilli, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, M. Baalouch, S. Bachmann, J. J. Back, A. Badalov, C. Baesso, W. Baldini, R. J. Barlow, C. Barschel, S. Barsuk, S. Bifani, N. Farley, P. Griffith, P. Ilten, I. R. Kenyon, C. Lazzeroni, A. Mazurov, J. McCarthy, C. J. Parkinson, L. Pescatore, D. Popov, N. K. Watson

Physics and Astronomy

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Abstract

Time-dependent CP asymmetries in the decay rates of the singly Cabibbo-suppressed decays D⁰ → K⁻K⁺ and D⁰ → π⁻π⁺ are measured in pp collision data corresponding to an integrated luminosity of 3.0 fb⁻¹ collected by the LHCb experiment. The D⁰ mesons are produced in semileptonic b-hadron decays, where the charge of the accompanying muon is used to determine the initial state as D⁰ or D^-0. The asymmetries in effective lifetimes between D⁰ and D^-0 decays, which are sensitive to indirect CP violation, are determined to be

A_Γ (K⁻K⁺) = (−0.134 ± 0.077 ^-0.026 _−0.034)%, A_Γ (π⁻π⁺) = −0.092 ± 0.145^-0.025_−0.033)%,

where the first uncertainties are statistical and the second systematic. This result is in agreement with previous measurements and with the hypothesis of no indirect CP violation in D⁰ decays.

Original language	English
Article number	43
Number of pages	19
Journal	Journal of High Energy Physics
Volume	2015
Issue number	4
DOIs	https://doi.org/10.1007/JHEP04(2015)043
Publication status	Published - 9 Apr 2015

Keywords

Charm physics
CP violation
Hadron-Hadron Scattering
Lifetime

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

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Cite this

LHCb Collaboration, Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., ... Watson, N. K. (2015). Measurement of indirect CP asymmetries in D⁰ → K⁻K⁺ and D⁰ → π⁻π⁺ decays using semileptonic B decays. Journal of High Energy Physics, 2015(4), Article 43. https://doi.org/10.1007/JHEP04(2015)043

@article{99fe67ae80f14df88f9c8ba9ae5992f8,

title = "Measurement of indirect CP asymmetries in D0 → K−K+ and D0 → π−π+ decays using semileptonic B decays",

abstract = "Time-dependent CP asymmetries in the decay rates of the singly Cabibbo-suppressed decays D0 → K−K+ and D0 → π−π+ are measured in pp collision data corresponding to an integrated luminosity of 3.0 fb−1 collected by the LHCb experiment. The D0 mesons are produced in semileptonic b-hadron decays, where the charge of the accompanying muon is used to determine the initial state as D0 or D-0. The asymmetries in effective lifetimes between D0 and D-0 decays, which are sensitive to indirect CP violation, are determined to beAΓ (K−K+) = (−0.134 ± 0.077 -0.026 −0.034)%, AΓ (π−π+) = −0.092 ± 0.145-0.025−0.033)%, where the first uncertainties are statistical and the second systematic. This result is in agreement with previous measurements and with the hypothesis of no indirect CP violation in D0 decays.",

keywords = "Charm physics, CP violation, Hadron-Hadron Scattering, Lifetime",

author = "{LHCb Collaboration} and R. Aaij and B. Adeva and M. Adinolfi and A. Affolder and Z. Ajaltouni and S. Akar and J. Albrecht and F. Alessio and M. Alexander and S. Ali and G. Alkhazov and {Alvarez Cartelle}, P. and Alves, {A. A.} and S. Amato and S. Amerio and Y. Amhis and L. An and L. Anderlini and J. Anderson and R. Andreassen and M. Andreotti and Andrews, {J. E.} and Appleby, {R. B.} and {Aquines Gutierrez}, O. and F. Archilli and A. Artamonov and M. Artuso and E. Aslanides and G. Auriemma and M. Baalouch and S. Bachmann and Back, {J. J.} and A. Badalov and C. Baesso and W. Baldini and Barlow, {R. J.} and C. Barschel and S. Barsuk and S. Bifani and N. Farley and P. Griffith and P. Ilten and Kenyon, {I. R.} and C. Lazzeroni and A. Mazurov and J. McCarthy and Parkinson, {C. J.} and L. Pescatore and D. Popov and Watson, {N. K.}",

year = "2015",

month = apr,

day = "9",

doi = "10.1007/JHEP04(2015)043",

language = "English",

volume = "2015",

journal = "Journal of High Energy Physics",

issn = "1126-6708",

publisher = "Springer",

number = "4",

}

LHCb Collaboration, Aaij, R, Adeva, B, Adinolfi, M, Affolder, A, Ajaltouni, Z, Akar, S, Albrecht, J, Alessio, F, Alexander, M, Ali, S, Alkhazov, G, Alvarez Cartelle, P, Alves, AA, Amato, S, Amerio, S, Amhis, Y, An, L, Anderlini, L, Anderson, J, Andreassen, R, Andreotti, M, Andrews, JE, Appleby, RB, Aquines Gutierrez, O, Archilli, F, Artamonov, A, Artuso, M, Aslanides, E, Auriemma, G, Baalouch, M, Bachmann, S, Back, JJ, Badalov, A, Baesso, C, Baldini, W, Barlow, RJ, Barschel, C, Barsuk, S, Bifani, S, Farley, N, Griffith, P, Ilten, P, Kenyon, IR, Lazzeroni, C, Mazurov, A, McCarthy, J, Parkinson, CJ, Pescatore, L, Popov, D & Watson, NK 2015, 'Measurement of indirect CP asymmetries in D⁰ → K⁻K⁺ and D⁰ → π⁻π⁺ decays using semileptonic B decays', Journal of High Energy Physics, vol. 2015, no. 4, 43. https://doi.org/10.1007/JHEP04(2015)043

TY - JOUR

T1 - Measurement of indirect CP asymmetries in D0 → K−K+ and D0 → π−π+ decays using semileptonic B decays

AU - LHCb Collaboration

AU - Aaij, R.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Affolder, A.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Ali, S.

AU - Alkhazov, G.

AU - Alvarez Cartelle, P.

AU - Alves, A. A.

AU - Amato, S.

AU - Amerio, S.

AU - Amhis, Y.

AU - An, L.

AU - Anderlini, L.

AU - Anderson, J.

AU - Andreassen, R.

AU - Andreotti, M.

AU - Andrews, J. E.

AU - Appleby, R. B.

AU - Aquines Gutierrez, O.

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 - Baldini, W.

AU - Barlow, R. J.

AU - Barschel, C.

AU - Barsuk, S.

AU - Bifani, S.

AU - Farley, N.

AU - Griffith, P.

AU - Ilten, P.

AU - Kenyon, I. R.

AU - Lazzeroni, C.

AU - Mazurov, A.

AU - McCarthy, J.

AU - Parkinson, C. J.

AU - Pescatore, L.

AU - Popov, D.

AU - Watson, N. K.

PY - 2015/4/9

Y1 - 2015/4/9

N2 - Time-dependent CP asymmetries in the decay rates of the singly Cabibbo-suppressed decays D0 → K−K+ and D0 → π−π+ are measured in pp collision data corresponding to an integrated luminosity of 3.0 fb−1 collected by the LHCb experiment. The D0 mesons are produced in semileptonic b-hadron decays, where the charge of the accompanying muon is used to determine the initial state as D0 or D-0. The asymmetries in effective lifetimes between D0 and D-0 decays, which are sensitive to indirect CP violation, are determined to beAΓ (K−K+) = (−0.134 ± 0.077 -0.026 −0.034)%, AΓ (π−π+) = −0.092 ± 0.145-0.025−0.033)%, where the first uncertainties are statistical and the second systematic. This result is in agreement with previous measurements and with the hypothesis of no indirect CP violation in D0 decays.

AB - Time-dependent CP asymmetries in the decay rates of the singly Cabibbo-suppressed decays D0 → K−K+ and D0 → π−π+ are measured in pp collision data corresponding to an integrated luminosity of 3.0 fb−1 collected by the LHCb experiment. The D0 mesons are produced in semileptonic b-hadron decays, where the charge of the accompanying muon is used to determine the initial state as D0 or D-0. The asymmetries in effective lifetimes between D0 and D-0 decays, which are sensitive to indirect CP violation, are determined to beAΓ (K−K+) = (−0.134 ± 0.077 -0.026 −0.034)%, AΓ (π−π+) = −0.092 ± 0.145-0.025−0.033)%, where the first uncertainties are statistical and the second systematic. This result is in agreement with previous measurements and with the hypothesis of no indirect CP violation in D0 decays.

KW - Charm physics

KW - CP violation

KW - Hadron-Hadron Scattering

KW - Lifetime

UR - http://www.scopus.com/inward/record.url?scp=84973508285&partnerID=8YFLogxK

U2 - 10.1007/JHEP04(2015)043

DO - 10.1007/JHEP04(2015)043

M3 - Article

AN - SCOPUS:84973508285

SN - 1126-6708

VL - 2015

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 4

M1 - 43

ER -