Observation of $D^{+}\to K^{+}{\eta }^{(}{\text{'}}^{)}$ and Search for $CP$ Violation in $D^{+}\to {\pi }^{+}{\eta }^{(}{\text{'}}^{)}$ Decays

Journal Article · Mon Nov 21 00:00:00 EST 2011 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.107.221801· OSTI ID:1033069

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

We report the first observation of D+ K+*(') and a search for CP violation in D+ +(') decays using a 791 fb-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+ +(') decays are B(D+ K+)/B(D+ +) = (3.06 ± 0.43 ± 0.14)% and B(D+ K+')/B(D+ +') = (3.77 ± 0.39 ± 0.10)% , where the first uncertainties are statistical and the second are systematic. We also report the most precise measurements of CP asymmetries to date: AD+→+ CP = (+1.74 ± 1.13 ± 0.20)% and AD+→+' CP = (-0.12 ± 1.12 ± 0.20)%, respectively.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
• Sponsoring Organization: USDOE
• Contributing Organization: Belle Collaboration
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1033069
• Report Number(s): PNNL-SA-81592; PRLTAO; 45392; TRN: US201202%%571
• Journal Information: Physical Review Letters, Vol. 107, Issue 22; ISSN 0031-9007
• Publisher: American Physical Society (APS)
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ASYMMETRY
PHYSICS
DECAY
Observation of and Search for CP Violation in D Decays
Environmental Molecular Sciences Laboratory