Observation of D-0 -> rho(0)gamma and Search for CP Violation in Radiative Charm Decays

Nanut, T. ; Zupanc, A. ; Adachi, I. ; Aihara, H. ; Al Said, S. ; Asner, D. M. ; Aulchenko, V. ; Aushev, T. ; Ayad, R. ; Babu, V. ; Badhrees, I. ; Bakich, A. M. ; Bansal, V. ; Behera, P. ; Bhardwaj, V. ; Biswal, J. ; Bondar, A. ; Bozek, A. ; Bracko, M. ; Browder, T. E. ; Cervenkov, D. ; Chekelian, V. ; Chen, A. ; Cheon, B. G. ; Chistov, R. ; Cho, K. ; Choi, S. -K. ; Choi, Y. ; Cinabro, D. ; Dash, N. ; Di Carlo, S. ; Dolezal, Z. ; Dutta, D. ; Eidelman, S. ; Farhat, H. ; Fast, J. E. ; Ferber, T. ; Fulsom, B. G. ; Gaur, V. ; Gabyshev, N. ; Garmash, A. ; Gillard, R. ; Goldenzweig, P. ; Golob, B. ; Hayasaka, K. ; Hayashii, H. ; Hou, W. -S. ; Iijima, T. ; Inami, K. ; Inguglia, G. ; Ishikawa, A. ; Iwasaki, Y. ; Jacobs, W. W. ; Jaegle, I. ; Joffe, D. ; Joo, K. K. ; Julius, T. ; Kaliyar, A. B. ; Kang, K. H. ; Kawasaki, T. ; Kim, D. Y. ; Kim, J. B. ; Kim, K. T. ; Kim, M. J. ; Kim, S. H. ; Kinoshita, K. ; Kodys, P. ; Korpar, S. ; Krokovny, P. ; Kuhr, T. ; Kulasiri, R. ; Kuzmin, A. ; Kwon, Y. -J. ; Lange, J. S. ; Lee, I. S. ; Li, C. H. ; Li, L. ; Li, Y. ; Gioi, L. Li ; Libby, J. ; Liventsev, D. ; Lubej, M. ; Masuda, M. ; Matsuda, T. ; Matvienko, D. ; Miyabayashi, K. ; Miyata, H. ; Mizuk, R. ; Mohanty, G. B. ; Moon, H. K. ; Nakao, M. ; Nath, K. J. ; Nayak, M. ; Nisar, N. K. ; Nishida, S. ; Ogawa, S. ; Okuno, S. ; Pakhlov, P. ; Pakhlova, G. ; Pal, B. ; Park, C. -S. ; Park, C. W. ; Park, H. ; Paul, S. ; Pedlar, T. K. ; Pesantez, L. ; Pestotnik, R. ; Petric, M. ; Piilonen, L. E. ; Prasanth, K. ; Pulvermacher, C. ; Rauch, J. ; Ritter, M. ; Rostomyan, A. ; Sakai, Y. ; Sandilya, S. ; Santelj, L. ; Sanuki, T. ; Sato, Y. ; Savinov, V. ; Schulter, T. ; Schneider, O. ; Schnell, G. ; Schwanda, C. ; Schwartz, A. J. ; Seino, Y. ; Senyo, K. ; Seon, O. ; Sevior, M. E. ; Shebalin, V. ; Shen, C. P. ; Shibata, T. -A. ; Shiu, J. -G. ; Shwartz, B. ; Solovieva, E. ; Stanic, S. ; Staric, M. ; Strube, J. F. ; Stypula, J. ; Sumiyoshi, T. ; Takizawa, M. ; Tamponi, U. ; Tenchini, F. ; Trabelsi, K. ; Uchida, M. ; Uno, S. ; Ushiroda, Y. ; Varner, G. ; Vinokurova, A. ; Vorobyev, V. ; Vossen, A. ; Wang, C. H. ; Wang, M. -Z. ; Wang, P. ; Watanabe, Y. ; Widmann, E. ; Won, E. ; Yamaoka, J. ; Yamashita, Y. ; Yelton, J. ; Zhang, Z. P. ; Zhilich, V. ; Zhukova, V. ; Zhulanov, V. ; Belle Collaboration

We report the first observation of the radiative charm decay D-0 -> rho(0)gamma and the first search for CP violation in decays D-0 -> rho(0)gamma, phi gamma, and (K) over bar (*0)(892)gamma, using a data sample of 943 fb(-1) collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The branching fraction is measured to be B(D-0 -> rho(0)gamma) = (1.77 +/- 0.30 +/- 0.07) x 10(-5), where the first uncertainty is statistical and the second is systematic. The obtained CP asymmetries A(CP)(D-0 ->rho(0)gamma) = +0.056 +/- 0.152 +/- 0.006, A(CP)(D-0 -> phi gamma) = -0.094 +/- 0.066 +/- 0.001, and A(CP)(D-0 -> (K) over bar (*0) gamma = -0.003 +/- 0.020 +/- 0.000 are consistent with no CP violation. We also present an improved measurement of the branching fractions B(D-0 -> phi gamma) = (2.76 +/- 0.19 +/- 0.10) x 10(-5) and B(D-0 -> (K) over bar (*0) gamma = (4.66 +/- 0.21 +/- 0.21) x 10(-4).


Published in:
Physical Review Letters, 118, 5, 051801
Year:
2017
Publisher:
College Pk, Amer Physical Soc
ISSN:
0031-9007
Laboratories:




 Record created 2017-03-27, last modified 2018-12-03


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