Search for CP violation in D^0 -> pi^0 pi^0 decays

Search for CP violation in D^0 -> pi^0 pi^0 decays

We search for CP violation in neutral charm meson decays using a data sample with an integrated luminosity of 966 fb^-1 collected with the Belle detector at the KEKB e+e- asymmetric-energy collider. The asymmetry obtained in the rate of D^0 and D^0-bar decays to the pi^0 pi^0 final state, [-0.03+-0....

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Những tác giả chính: Nisar, N, Trabelsi, K, Mohanty, G, Aziz, T, Abdesselam, A, Adachi, I, Aihara, H, Arinstein, K, Asner, D, Aulchenko, V, Aushev, T, Ayad, R, Bahinipati, S, Bakich, A, Bala, A, Bansal, V, Behera, P, Belous, K, Bhardwaj, V, Bobrov, A, Bonvicini, G, Bozek, A, Bračko, M, Browder, T, Červenkov, D
Định dạng: Journal article
Ngôn ngữ:English
Được phát hành: 2014
Miêu tả
Tóm tắt:We search for CP violation in neutral charm meson decays using a data sample with an integrated luminosity of 966 fb^-1 collected with the Belle detector at the KEKB e+e- asymmetric-energy collider. The asymmetry obtained in the rate of D^0 and D^0-bar decays to the pi^0 pi^0 final state, [-0.03+-0.64(stat)+-0.10(syst)]%, is consistent with no CP violation. This constitutes an order of magnitude improvement over the existing result. We also present an updated measurement of the CP asymmetry in the D^0 -> K_S pi^0 decay: A_{CP}(D^0 -> K_S pi^0) = [-0.21+-0.16(stat)+-0.07(syst)]%.

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