Measurement of mixing and CP violation parameters in two-body charm decays

• Published in: The journal of high energy physics Vol. 2012; no. 4
• Main Authors: Affolder, A., Ali, S., Auriemma, G., Blouw, J., Bonivento, W., Borghi, S., van den Brand, J., Britsch, M., Brook, N. H., Burducea, I., Bursche, A., Buytaert, J., Gomez, M. Calvo, Cauet, Ch, Charles, M., Coco, V., De Bonis, I., De Capua, S., De Paula, L., Degaudenzi, H., Derkach, D., Dordei, F., Dossett, D., Dupertuis, F., Farry, S., Fave, V., Fitzpatrick, C., Gao, Y., Gauld, R., Göbel, C., Greening, E., Harrison, P. F., Morata, J. A. Hernando, Hicks, E., Hutchcroft, D., Jans, E., Jaton, P., Kandybei, S., Karacson, M., Kim, Y. M., Knecht, M., Korolev, M., Kozlinskiy, A., Lanfranchi, G., Langenbruch, C., Latham, T., Le Gac, R., Lieng, M., Liles, M., Lindner, R., Asamar, E. Lopez, Luisier, J., Mamunur, R. M. D., Martens, A., Maynard, B., Minard, M.-N., Rodriguez, J. Molina, Muheim, F., Muryn, B., Naik, P., Nakada, T., Nandakumar, R., Nasteva, I., Nikitin, N., Novoselov, A., Oblakowska-Mucha, A., Perret, P., Pessina, G., Olloqui, E. Picatoste, Popov, D., Prisciandaro, J., Raven, G., dos Reis, A. C., Romero, D. A. Roa, Robbe, P., Rodrigues, E., Roiser, S., Silva, J. J. Saborido, Santovetti, E., Sapunov, M., Sarti, A., Satriano, C., Savrie, M., Schneider, O., Shevchenko, O., Shevchenko, V., Shires, A., De Paula, B. Souza, Sparkes, A., Stahl, S., Subbiah, V. K., Szumlak, T., Teodorescu, E., Tournefier, E., Valenti, G., Watson, N. K., Whitehead, M., Wiggers, L., Zhong, L., Zvyagin, A.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer-Verlag 01.04.2012; Springer Nature B.V; Springer Verlag; Springer
• Subjects: Classical and Quantum Gravitation; CP violation; Decay; Eigenvectors; Elementary Particles; Gravitació; Gravitation; Hadrons; High energy physics; High Energy Physics - Experiment; Luminosity; Matter & antimatter; Mesons; Parameters; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Quantum theory; Relativitat (Física); Relativity (Physics); Relativity Theory; String Theory; Teoria quàntica; Teoria quàntica de camps; Hadron-Hadron Scattering
• ISSN: 1029-8479; 1126-6708; 1029-8479
• DOI: 10.1007/JHEP04(2012)129

A bstract A study of mixing and indirect CP violation in D 0 mesons through the determination of the parameters y CP and A Γ is presented. The parameter y CP is the deviation from unity of the ratio of effective lifetimes measured in D 0 decays to the CP eigenstate K + K − with respect to decays to the Cabibbo favoured mode K − π + . The result measured using data collected by LHCb in 2010, corresponding to an integrated luminosity of 29 pb −1 , is y CP  = (5 . 5 ± 6 . 3 stat  ± 4 . 1 syst ) × 10 −3 . The parameter A Γ is the asymmetry of effective lifetimes measured in decays of D 0 and mesons to K + K − . The result is A Γ  = (−5 . 9 ± 5 . 9 stat  ± 2 . 1 syst ) × 10 −3 . A data-driven technique is used to correct for lifetime-biasing effects.