Measurement of time-dependent $CP$ violation in $B^0 \to K^0_S \pi^0 \pi^0$ decays
- Yusa, Y.
- Aihara, H.
- Al Said, S.
- Asner, D.M.
- Atmacan, H.
- Aulchenko, V.
- Aushev, T.
- Ayad, R.
- Babu, V.
- Badhrees, I.
- Bahinipati, S.
- Bakich, A.M.
- Bansal, V.
- Behera, P.
- Bhardwaj, V.
- Bhuyan, B.
- Biswal, J.
- Bozek, A.
- Bračko, M.
- Browder, T.E.
- Cao, L.
- Červenkov, D.
- Chekelian, V.
- Chen, A.
- Cheon, B.G.
- Chilikin, K.
- Choi, S.-K.
- Choi, Y.
- Cinabro, D.
- Cunliffe, S.
- Dash, N.
- Di Carlo, S.
- Dong, T.V.
- Drásal, Z.
- Eidelman, S.
- Epifanov, D.
- Fast, J.E.
- Fulsom, B.G.
- Garg, R.
- Gaur, V.
- Garmash, A.
- Giri, A.
- Goldenzweig, P.
- Golob, B.
- Guan, Y.
- Haba, J.
- Hayasaka, K.
- Hayashii, H.
- Hirose, S.
- Inami, K.
- Inguglia, G.
- Ishikawa, A.
- Itoh, R.
- Iwasaki, M.
- Iwasaki, Y.
- Jacobs, W.W.
- Jia, S.
- Jin, Y.
- Joo, K.K.
- Kang, K.H.
- Kawasaki, T.
- Kiesling, C.
- Kim, D.Y.
- Kim, J.B.
- Kim, K.T.
- Kim, S.H.
- Kinoshita, K.
- Kodyš, P.
- Korpar, S.
- Kotchetkov, D.
- Križan, P.
- Kroeger, R.
- Kuhr, T.
- Kumar, R.
- Kwon, Y.-J.
- Lange, J.S.
- Lee, I.S.
- Lee, S.C.
- Li, L.K.
- Li, Y.B.
- Li Gioi, L.
- Libby, J.
- Liventsev, D.
- Lubej, M.
- Luo, T.
- Masuda, M.
- Matsuda, T.
- Merola, M.
- Miyabayashi, K.
- Miyata, H.
- Mizuk, R.
- Mohanty, G.B.
- Moon, H.K.
- Nakano, E.
- Nakao, M.
- Nanut, T.
- Nath, K.J.
- Natkaniec, Z.
- Nisar, N.K.
- Nishida, S.
- Nishimura, K.
- Ogawa, K.
- Ogawa, S.
- Ono, H.
- Pakhlova, G.
- Pal, B.
- Pardi, S.
- Park, H.
- Paul, S.
- Pedlar, T.K.
- Pestotnik, R.
- Piilonen, L.E.
- Popov, V.
- Prencipe, E.
- Rostomyan, A.
- Russo, G.
- Sakai, Y.
- Sandilya, S.
- Sanuki, T.
- Savinov, V.
- Schneider, O.
- Schnell, G.
- Schwanda, C.
- Schwartz, A.J.
- Seino, Y.
- Senyo, K.
- Seon, O.
- Sevior, M.E.
- Shen, C.P.
- Shibata, T.-A.
- Shiu, J.-G.
- Starič, M.
- Sumihama, M.
- Sumiyoshi, T.
- Takizawa, M.
- Tamponi, U.
- Tanida, K.
- Tenchini, F.
- Uchida, M.
- Uglov, T.
- Unno, Y.
- Uno, S.
- Ushiroda, Y.
- Usov, Y.
- Van Hulse, C.
- Van Tonder, R.
- Varner, G.
- Varvell, K.E.
- Vorobyev, V.
- Vossen, A.
- Waheed, E.
- Wang, Biao
- Wang, C.H.
- Wang, M.-Z.
- Wang, P.
- Won, E.
- Ye, H.
- Yin, J.H.
- Zhang, Z.P.
- Zhilich, V.
- Zhulanov, V.
DOIAbstract
International audienceWe report a measurement of time-dependent CP violation in B0→KS0π0π0 decays using a data sample of 772×106 BB¯ pairs collected by the Belle experiment running at the ϒ(4S) resonance at the KEKB e+e- collider. This decay proceeds mainly via a b→sdd¯ “penguin” amplitude. The results are sin2ϕ1eff=0.92-0.31+0.27 (stat.) ±0.11 (syst.) and A=0.28±0.21 (stat.) ±0.04 (syst.), which are the most precise measurements of CP violation in this decay mode to date. The value for the CP-violating parameter sin2ϕ1eff is consistent with that obtained using decay modes proceeding via a b→cc¯s “tree” amplitude
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