Measurement of cp asymmetry in D0 → K−K+ and D0 → p−p+ decays

R. Aaij; B. Adeva; M. Adinolfi; A. Affolder; Z. Ajaltouni; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G. Alkhazov; P. Alvarez Cartelle; A. A. Alves; S. Amato; S. Amerio; Y. Amhis; LA Everse; L. Anderlini; J. Anderson; P.R. Andreassen; M. Andreotti; J.E. Andrews; R. B. Appleby; O. Aquines Gutierrez; F. Archilli; A. Artamonov; J. van den Brand; K. Carvalho Akiba; V. Coco; P. N Y David; K. De Bruyn; C. Farinelli; M. Ferro-Luzzi; V. Heijne; T. Ketel; R. F. Koopman; A. Kozlinskiy; R. W. Lambert; J. van Leerdam; M. Merk; S. Oggero; G. Raven; M. Schiller; N. Serra; H. Snoek; B. Storaci; V. Syropoulos; J. van Tilburg; S. Tolk; P. Tsopelas; N. Tuning; The LHCb collaboration

doi:10.1007/JHEP07(2014)041

Measurement of cp asymmetry in D⁰ → K⁻K⁺ and D⁰ → p⁻p⁺ decays

R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A. A. Alves, S. Amato, S. Amerio, Y. Amhis, LA Everse, L. Anderlini, J. Anderson, P.R. Andreassen, M. AndreottiJ.E. Andrews, R. B. Appleby, O. Aquines Gutierrez, F. Archilli, A. Artamonov, J. van den Brand, K. Carvalho Akiba, V. Coco, P. N Y David, K. De Bruyn, C. Farinelli, M. Ferro-Luzzi, V. Heijne, T. Ketel, R. F. Koopman, A. Kozlinskiy, R. W. Lambert, J. van Leerdam, M. Merk, S. Oggero, G. Raven, M. Schiller, N. Serra, H. Snoek, B. Storaci, V. Syropoulos, J. van Tilburg^*, S. Tolk, P. Tsopelas, N. Tuning, The LHCb collaboration

^*Corresponding author for this work

(Astro)-Particles Physics

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

Abstract

Time-integrated CP asymmetries in D⁰ decays to the final states K⁻K⁺ and p⁻p⁺ are measured using proton-proton collisions corresponding to 3 fb−1 of integrated luminosity collected at centre-of-mass energies of 7TeV and 8TeV. The D0 mesons are produced in semileptonic b-hadron decays, where the charge of the accompanying muon is used to determine the initial flavour of the charm meson. The difference in CP asymmetries between the two final states is measured to be DA_CP = A_CP(K⁻K⁺) − A_CP (p⁻p⁺) = (+0.14 ± 0.16 (stat) ± 0.08 (syst))% . A measurement of A_CP(K⁻K⁺) is obtained assuming negligible CP violation in charm mixing and in Cabibbo-favoured D decays. It is found to be A_CP(K⁻K⁺) = (−0.06 ± 0.15 (stat) ± 0.10 (syst))% , where the correlation coefficient between DA_CP and A_CP(K⁻K⁺) is r = 0.28. By combining these results, the CP asymmetry in the D⁰®p⁻p⁺ channel is ACP (p⁻p⁺) = (−0.20 ± 0.19 (stat) ± 0.10 (syst))%.

Original language	English
Article number	041
Pages (from-to)	1-24
Number of pages	24
Journal	Journal of High Energy Physics
Volume	2014
Issue number	7
DOIs	https://doi.org/10.1007/JHEP07(2014)041
Publication status	Published - 9 Jul 2014

Keywords

Charm physics
CP violation
Flavor physics
Hadron-Hadron Scattering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1007/JHEP07(2014)041

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Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A. A., Amato, S., Amerio, S., Amhis, Y., Everse, LA., Anderlini, L., Anderson, J., Andreassen, P. R., ... The LHCb collaboration (2014). Measurement of cp asymmetry in D⁰ → K⁻K⁺ and D⁰ → p⁻p⁺ decays. Journal of High Energy Physics, 2014(7), 1-24. Article 041. https://doi.org/10.1007/JHEP07(2014)041

@article{ab56af5c62094ec88c368bc3dc4aa8ff,

title = "Measurement of cp asymmetry in D0 → K−K+ and D0 → p−p+ decays",

abstract = "Time-integrated CP asymmetries in D0 decays to the final states K−K+ and p−p+ are measured using proton-proton collisions corresponding to 3 fb−1 of integrated luminosity collected at centre-of-mass energies of 7TeV and 8TeV. The D0 mesons are produced in semileptonic b-hadron decays, where the charge of the accompanying muon is used to determine the initial flavour of the charm meson. The difference in CP asymmetries between the two final states is measured to be DACP = ACP(K−K+) − ACP (p−p+) = (+0.14 ± 0.16 (stat) ± 0.08 (syst))% . A measurement of ACP(K−K+) is obtained assuming negligible CP violation in charm mixing and in Cabibbo-favoured D decays. It is found to be ACP(K−K+) = (−0.06 ± 0.15 (stat) ± 0.10 (syst))% , where the correlation coefficient between DACP and ACP(K−K+) is r = 0.28. By combining these results, the CP asymmetry in the D0{\textregistered}p−p+ channel is ACP (p−p+) = (−0.20 ± 0.19 (stat) ± 0.10 (syst))%.",

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

author = "R. Aaij and B. Adeva and M. Adinolfi and A. Affolder and Z. Ajaltouni 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 LA Everse and L. Anderlini and J. Anderson and P.R. Andreassen and M. Andreotti and J.E. Andrews and Appleby, {R. B.} and {Aquines Gutierrez}, O. and F. Archilli and A. Artamonov and {van den Brand}, J. and {Carvalho Akiba}, K. and V. Coco and David, {P. N Y} and {De Bruyn}, K. and C. Farinelli and M. Ferro-Luzzi and V. Heijne and T. Ketel and Koopman, {R. F.} and A. Kozlinskiy and Lambert, {R. W.} and {van Leerdam}, J. and M. Merk and S. Oggero and G. Raven and M. Schiller and N. Serra and H. Snoek and B. Storaci and V. Syropoulos and {van Tilburg}, J. and S. Tolk and P. Tsopelas and N. Tuning and {The LHCb collaboration}",

year = "2014",

month = jul,

day = "9",

doi = "10.1007/JHEP07(2014)041",

language = "English",

volume = "2014",

pages = "1--24",

journal = "Journal of High Energy Physics",

issn = "1029-8479",

publisher = "Springer Verlag",

number = "7",

}

Aaij, R, Adeva, B, Adinolfi, M, Affolder, A, Ajaltouni, Z, Albrecht, J, Alessio, F, Alexander, M, Ali, S, Alkhazov, G, Alvarez Cartelle, P, Alves, AA, Amato, S, Amerio, S, Amhis, Y, Everse, LA, Anderlini, L, Anderson, J, Andreassen, PR, Andreotti, M, Andrews, JE, Appleby, RB, Aquines Gutierrez, O, Archilli, F, Artamonov, A, van den Brand, J, Carvalho Akiba, K, Coco, V, David, PNY, De Bruyn, K, Farinelli, C, Ferro-Luzzi, M, Heijne, V, Ketel, T, Koopman, RF, Kozlinskiy, A, Lambert, RW, van Leerdam, J, Merk, M, Oggero, S, Raven, G, Schiller, M, Serra, N, Snoek, H, Storaci, B, Syropoulos, V, van Tilburg, J, Tolk, S, Tsopelas, P, Tuning, N & The LHCb collaboration 2014, 'Measurement of cp asymmetry in D⁰ → K⁻K⁺ and D⁰ → p⁻p⁺ decays', Journal of High Energy Physics, vol. 2014, no. 7, 041, pp. 1-24. https://doi.org/10.1007/JHEP07(2014)041

TY - JOUR

T1 - Measurement of cp asymmetry in D0 → K−K+ and D0 → p−p+ decays

AU - Aaij, R.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Affolder, A.

AU - Ajaltouni, Z.

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 - Everse, LA

AU - Anderlini, L.

AU - Anderson, J.

AU - Andreassen, P.R.

AU - Andreotti, M.

AU - Andrews, J.E.

AU - Appleby, R. B.

AU - Aquines Gutierrez, O.

AU - Archilli, F.

AU - Artamonov, A.

AU - van den Brand, J.

AU - Carvalho Akiba, K.

AU - Coco, V.

AU - David, P. N Y

AU - De Bruyn, K.

AU - Farinelli, C.

AU - Ferro-Luzzi, M.

AU - Heijne, V.

AU - Ketel, T.

AU - Koopman, R. F.

AU - Kozlinskiy, A.

AU - Lambert, R. W.

AU - van Leerdam, J.

AU - Merk, M.

AU - Oggero, S.

AU - Raven, G.

AU - Schiller, M.

AU - Serra, N.

AU - Snoek, H.

AU - Storaci, B.

AU - Syropoulos, V.

AU - van Tilburg, J.

AU - Tolk, S.

AU - Tsopelas, P.

AU - Tuning, N.

AU - The LHCb collaboration

PY - 2014/7/9

Y1 - 2014/7/9

N2 - Time-integrated CP asymmetries in D0 decays to the final states K−K+ and p−p+ are measured using proton-proton collisions corresponding to 3 fb−1 of integrated luminosity collected at centre-of-mass energies of 7TeV and 8TeV. The D0 mesons are produced in semileptonic b-hadron decays, where the charge of the accompanying muon is used to determine the initial flavour of the charm meson. The difference in CP asymmetries between the two final states is measured to be DACP = ACP(K−K+) − ACP (p−p+) = (+0.14 ± 0.16 (stat) ± 0.08 (syst))% . A measurement of ACP(K−K+) is obtained assuming negligible CP violation in charm mixing and in Cabibbo-favoured D decays. It is found to be ACP(K−K+) = (−0.06 ± 0.15 (stat) ± 0.10 (syst))% , where the correlation coefficient between DACP and ACP(K−K+) is r = 0.28. By combining these results, the CP asymmetry in the D0®p−p+ channel is ACP (p−p+) = (−0.20 ± 0.19 (stat) ± 0.10 (syst))%.

AB - Time-integrated CP asymmetries in D0 decays to the final states K−K+ and p−p+ are measured using proton-proton collisions corresponding to 3 fb−1 of integrated luminosity collected at centre-of-mass energies of 7TeV and 8TeV. The D0 mesons are produced in semileptonic b-hadron decays, where the charge of the accompanying muon is used to determine the initial flavour of the charm meson. The difference in CP asymmetries between the two final states is measured to be DACP = ACP(K−K+) − ACP (p−p+) = (+0.14 ± 0.16 (stat) ± 0.08 (syst))% . A measurement of ACP(K−K+) is obtained assuming negligible CP violation in charm mixing and in Cabibbo-favoured D decays. It is found to be ACP(K−K+) = (−0.06 ± 0.15 (stat) ± 0.10 (syst))% , where the correlation coefficient between DACP and ACP(K−K+) is r = 0.28. By combining these results, the CP asymmetry in the D0®p−p+ channel is ACP (p−p+) = (−0.20 ± 0.19 (stat) ± 0.10 (syst))%.

KW - Charm physics

KW - CP violation

KW - Flavor physics

KW - Hadron-Hadron Scattering

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U2 - 10.1007/JHEP07(2014)041

DO - 10.1007/JHEP07(2014)041

M3 - Article

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SN - 1029-8479

VL - 2014

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JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 7

M1 - 041

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