arXiv · 1712.00619
Search for $CP$ violation in the $D^{+}\to\pi^{+}\pi^{0}$ decay at Belle
Abstract
We search for $CP$ violation in the charged charm meson decay $D^{+}\to\pi^{+}\pi^{0}$, based on a data sample corresponding to an integrated luminosity of $\rm 921~fb^{-1}$ collected by the Belle experiment at the KEKB $e^{+}e^{-}$ asymmetric-energy collider. The measured $CP$ violating asymmetry is $[+2.31\pm1.24({\rm stat})\pm0.23({\rm syst})]\%$, which is consistent with the standard model prediction and has a significantly improved precision compared to previous results.
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Belle Collaboration, V. Babu, K. Trabelsi, G. B. Mohanty, T. Aziz, D. Greenwald, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, R. Ayad, I. Badhrees, S. Bahinipati, A. M. Bakich, V. Bansal, P. Behera, M. Berger, V. Bhardwaj, J. Biswal, A. Bobrov, A. Bozek, M. Bračko, T. E. Browder, D. Červenkov, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, Y. Choi, S. Choudhury, D. Cinabro, N. Dash, S. Di Carlo, Z. Doležal, Z. Drásal, D. Dutta, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, P. Goldenzweig, B. Golob, Y. Guan, E. Guido, J. Haba, K. Hayasaka, H. Hayashii, M. T. Hedges, T. Horiguchi, W. -S. Hou, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, H. B. Jeon, S. Jia, Y. Jin, D. Joffe, K. K. Joo, T. Julius, A. B. Kaliyar, J. H. Kang, K. H. Kang, G. Karyan, P. Katrenko, T. Kawasaki, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, K. T. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. Križan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, R. Kumar, A. Kuzmin, Y. -J. Kwon, J. S. Lange, L. K. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Luo, M. Masuda. 2017-12-02. Search for $CP$ violation in the $D^{+}\to\pi^{+}\pi^{0}$ decay at Belle. https://doi.org/10.1103/physrevd.97.011101
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