Observation of D+→K+η(′ and search for CP violation in D+→π+η(′) decays

E. Won, B. R. Ko, I. Adachi, H. Aihara, K. Arinstein, D. M. Asner, T. Aushev, A. M. Bakich, E. Barberio, A. Bay, V. Bhardwaj, B. Bhuyan, M. Bischofberger, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, P. Chang, A. ChenP. Chen, B. G. Cheon, K. Chilikin, I. S. Cho, K. Cho, S. K. Choi, Y. Choi, J. Dalseno, M. Danilov, Z. Doležal, Z. Drásal, A. Drutskoy, S. Eidelman, J. E. Fast, V. Gaur, N. Gabyshev, A. Garmash, Y. M. Goh, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwabuchi, Y. Iwasaki, T. Iwashita, N. J. Joshi, T. Julius, J. H. Kang, N. Katayama, T. Kawasaki, H. Kichimi, 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, N. Kobayashi, S. Koblitz, P. Kodyš, S. Korpar, P. Križan, T. Kumita, A. Kuzmin, Youngjoon Kwon, J. S. Lange, M. J. Lee, S. H. Lee, J. Li, Y. Li, J. Libby, C. L. Lim, C. Liu, Y. Liu, D. Liventsev, R. Louvot, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, G. B. Mohanty, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Neubauer, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, P. Pakhlov, G. Pakhlova, H. Park, H. K. Park, K. S. Park, R. Pestotnik, M. Petrič, L. E. Piilonen, M. Röhrken, S. Ryu, H. Sahoo, K. Sakai, Y. Sakai, T. Sanuki, O. Schneider, C. Schwanda, A. J. Schwartz, K. Senyo, O. Seon, M. E. Sevior, C. P. Shen, T. A. Shibata, J. G. Shiu, F. Simon, J. B. Singh, P. Smerkol, Y. S. Sohn, A. Sokolov, E. Solovieva, S. Stanič, M. Starič, M. Sumihama, T. Sumiyoshi, S. Suzuki, G. Tatishvili, Y. Teramoto, K. Trabelsi, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, Y. Usov, S. E. Vahsen, G. Varner, A. Vinokurova, C. H. Wang, M. Z. Wang, P. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, B. D. Yabsley, Y. Yamashita, M. Yamauchi, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc, O. Zyukova

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

We report the first observation of the doubly Cabibbo-suppressed decays D+→K+η(′) using a 791fb-1 data sample collected with the Belle detector at the KEKB asymmetric-energy e +e- collider. The ratio of the branching fractions of doubly Cabibbo-suppressed relative to singly Cabibbo-suppressed D +→π+η(′) decays are B(D +→K+η)/B(D+→π+η )=(3.06±0.43±0.14)% and B(D+→K+η )/B(D+→π+η )=(3.77±0.39±0.10)%. From these, we find that the relative final-state phase difference between the tree and annihilation amplitudes in D+ decays, δTA, is (72±9)°or (288±9)°. We also report the most precise measurements of CP asymmetries to date: ACPD+→π +η=(+1.74±1.13±0.19)% and ACPD+→ π+η=(-0.12±1.12±0.17)%.

Original languageEnglish
Article number221801
JournalPhysical review letters
Volume107
Issue number22
DOIs
Publication statusPublished - 2011 Nov 21

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Observation of D<sup>+</sup>→K<sup>+</sup>η(′ and search for CP violation in D<sup>+</sup>→π<sup>+</sup>η(′) decays'. Together they form a unique fingerprint.

  • Cite this

    Won, E., Ko, B. R., Adachi, I., Aihara, H., Arinstein, K., Asner, D. M., Aushev, T., Bakich, A. M., Barberio, E., Bay, A., Bhardwaj, V., Bhuyan, B., Bischofberger, M., Bondar, A., Bozek, A., Bračko, M., Brodzicka, J., Browder, T. E., Chang, P., ... Zyukova, O. (2011). Observation of D+→K+η(′ and search for CP violation in D+→π+η(′) decays. Physical review letters, 107(22), [221801]. https://doi.org/10.1103/PhysRevLett.107.221801