Measurement of the CP-violation parameter sin 2φ 1 with a new tagging method at the Y(5S) resonance

Y. Sato, H. Yamamoto, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, T. Aziz, A. M. Bakich, V. Bhardwaj, B. Bhuyan, M. Bischofberger, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, P. Chang, P. Chen, B. G. Cheon, K. Chilikin, R. ChistovI. S. Cho, K. Cho, S. K. Choi, Y. Choi, J. Dalseno, Z. Doleal, Z. Drásal, S. Eidelman, D. Epifanov, J. E. Fast, V. Gaur, N. Gabyshev, Y. M. Goh, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. S. Hou, H. J. Hyun, A. Ishikawa, R. Itoh, M. Iwabuchi, Y. Iwasaki, T. Iwashita, T. Julius, P. Kapusta, T. Kawasaki, H. Kichimi, C. Kiesling, H. J. Kim, H. O. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, N. Kobayashi, P. Kody, S. Korpar, P. Krian, P. Krokovny, T. Kuhr, R. Kumar, T. Kumita, A. Kuzmin, Y. J. Kwon, J. S. Lange, S. H. Lee, J. Li, Y. Li, C. Liu, Z. Q. Liu, R. Louvot, S. McOnie, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, N. Muramatsu, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, W. Ostrowicz, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, T. K. Pedlar, M. Petrič, L. E. Piilonen, A. Poluektov, M. Röhrken, S. Ryu, H. Sahoo, Y. Sakai, T. Sanuki, O. Schneider, C. Schwanda, A. J. Schwartz, R. Seidl, K. Senyo, O. Seon, M. E. Sevior, M. Shapkin, C. P. Shen, T. A. Shibata, J. G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, P. Smerkol, Y. S. Sohn, A. Sokolov, E. Solovieva, S. Stanič, M. Starič, J. Stypula, M. Sumihama, T. Sumiyoshi, S. Tanaka, G. Tatishvili, Y. Teramoto, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, G. Varner, K. E. Varvell, C. H. Wang, M. Z. Wang, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, J. Wicht, E. Won, B. D. Yabsley, Y. Yamashita, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

We report a measurement of the CP-violation parameter sin2φ 1 at the Υ(5S) resonance using a new tagging method, called "B-π tagging." In Υ(5S) decays containing a neutral B meson, a charged B, and a charged pion, the neutral B is reconstructed in the J/ψKS0 CP-eigenstate decay channel. The initial flavor of the neutral B meson at the moment of the Υ(5S) decay is opposite to that of the charged B and may thus be inferred from the charge of the pion without reconstructing the charged B. From the asymmetry between B-π + and B-π - tagged J/ψKS0 yields, we determine sin2φ 1=0.57±0.58(stat) ±0.06(syst). The results are based on 121fb -1 of data recorded by the Belle detector at the KEKB e +e - collider.

Original languageEnglish
JournalPhysical Review Letters
Volume108
Issue number17
DOIs
StatePublished - 2012 Apr 24

Fingerprint Dive into the research topics of 'Measurement of the CP-violation parameter sin 2φ <sub>1</sub> with a new tagging method at the Y(5S) resonance'. Together they form a unique fingerprint.

  • Cite this

    Sato, Y., Yamamoto, H., Aihara, H., Asner, D. M., Aulchenko, V., Aushev, T., Aziz, T., Bakich, A. M., Bhardwaj, V., Bhuyan, B., Bischofberger, M., Bondar, A., Bozek, A., Bračko, M., Browder, T. E., Chang, P., Chen, P., Cheon, B. G., Chilikin, K., ... Zupanc, A. (2012). Measurement of the CP-violation parameter sin 2φ 1 with a new tagging method at the Y(5S) resonance. Physical Review Letters, 108(17). https://doi.org/10.1103/PhysRevLett.108.171801