Constraints on the unitarity triangle angle γ from Dalitz plot analysis of B0 → DK+π– decays

• Published in: Physical review. D 2016-06, Vol.93 (11)
• Main Authors: Akar, S., Amerio, S., Anderlini, L., Andrews, J. E., Belloli, N., Birnkraut, A., Blusk, S., Bowen, E., Bozzi, C., Britton, T., Buytaert, J., Cassina, L., Castillo Garcia, L., Cojocariu, L., Couturier, B., Craik, D. C., De Paula, L., Dean, C. -T., Decamp, D., Dovbnya, A., Dungs, K., Egede, U., Farry, S., Firlej, M., Fontana, M., Forty, R., Göbel, C., Graugés, E., Grillo, L., Hadavizadeh, T., Han, X., Harrison, J., Henry, L., Heß, M., Hongming, L., Jurik, N., Karacson, M., Kenyon, I. R., Ketel, T., Kirn, T., Koopman, R. F., Kozeiha, M., Kruse, F., Kurek, K., Lambert, D., Langenbruch, C., Langhans, B., Li, Y., Likhomanenko, T., Luo, H., Maguire, K., Malde, S., Martins Tostes, D., Maurin, B., Meadows, B., Merli, A., Mitzel, D. S., Monroy, I. A., Monteil, S., Morandin, M., Mussini, M., Nasteva, I., Nikodem, T., Oblakowska-Mucha, A., Okhrimenko, O., Palutan, M., Papanestis, A., Pellegrino, A., Pescatore, L., Pietrzyk, B., Piucci, A., Polci, F., Polycarpo, E., Reichert, S., Rives Molina, V., Sagidova, N., Sarti, A., Schlupp, M., Schubiger, M., Sciascia, B., Shevchenko, V., Smith, J., Snoek, H., Soomro, F., Sutcliffe, W., Tolk, S., Ukleja, A., Vallier, A., Vazquez Gomez, R., Vecchi, S., Voong, D., Voß, C., Wallace, C., Walsh, J., Websdale, D., Whitehead, M., Witek, M., Yang, Z., Yin, H., Yuan, X.
• Format: Article
• Language: English
• Subjects: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
• ISSN: 2470-0010
• DOI: 10.1103/PhysRevD.93.112018

The first study is presented of CP violation with an amplitude analysis of the Dalitz plot of B0 → DK+π– decays, with D → K+π–, K+K–, and π+π–. The analysis is based on a data sample corresponding to 3.0 fb–1 of pp collisions collected with the LHCb detector. No significant CP violation effect is seen, and constraints are placed on the angle γ of the unitarity triangle formed from elements of the Cabibbo-Kobayashi-Maskawa quark mixing matrix. Hadronic parameters associated with the B0 → DK*(892)0 decay are determined for the first time. These measurements can be used to improve the sensitivity to γ of existing and future studies of the B0 → DK*(892)0 decay.