Observation of B±→ψ(2S)π± and search for direct CP violation

V. Bhardwaj, R. Kumar, J. B. Singh, I. Adachi, H. Aihara, K. Arinstein, T. Aushev, T. Aziz, S. Bahinipati, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, K. Belous, U. Bitenc, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. BrowderM. C. Chang, P. Chang, A. Chen, B. G. Cheon, R. Chistov, I. S. Cho, S. K. Choi, Y. Choi, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, P. Goldenzweig, B. Golob, H. Ha, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, Y. Hoshi, W. S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, N. J. Joshi, D. H. Kah, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. O. Kim, S. K. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, A. Kuzmin, Y. J. Kwon, S. H. Kyeong, J. S. Lange, J. S. Lee, S. W. Lin, C. Liu, Y. Liu, D. Liventsev, F. Mandl, A. Matyja, S. McOnie, T. Medvedeva, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, Y. Nagasaka, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, J. Schümann, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, J. G. Shiu, B. Shwartz, A. Somov, S. Stanič, M. Starič, T. Sumiyoshi, S. Suzuki, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, K. Trabelsi, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, G. Varner, K. E. Varvell, K. Vervink, C. C. Wang, C. H. Wang, M. Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, Eunil Won, Y. Yamashita, M. Yamauchi, C. C. Zhang, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

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Abstract

We report the first observation of B±→ψ(2S)π±, a Cabibbo- and color-suppressed decay. This analysis is based on 657×106 BB̄ events collected at the Υ(4S) resonance with the Belle detector at the KEKB energy-asymmetric e+e- collider. The measured branching fraction is (2.44±0.22±0.20)×10-5 and the charge asymmetry is A=0.022±0.085±0.016. The ratio of the branching fractions B(B±→ψ(2S)π±)/B(B±→ψ(2S)K±)=(3. 99±0.36±0.17)% is also determined.

Original languageEnglish
Article number051104
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume78
Issue number5
DOIs
Publication statusPublished - 2008 Sep 25

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Bhardwaj, V., Kumar, R., Singh, J. B., Adachi, I., Aihara, H., Arinstein, K., Aushev, T., Aziz, T., Bahinipati, S., Bakich, A. M., Balagura, V., Barberio, E., Bay, A., Belous, K., Bitenc, U., Bondar, A., Bozek, A., Bračko, M., Brodzicka, J., ... Zyukova, O. (2008). Observation of B±→ψ(2S)π± and search for direct CP violation. Physical Review D - Particles, Fields, Gravitation and Cosmology, 78(5), [051104]. https://doi.org/10.1103/PhysRevD.78.051104