Measurement of the branching fraction and search for CP violation in D0? K0SK0S?+?- decays at Belle

被引：0
作者：
Sangal, A.
Schwartz, A. J.
Aihara, H.
Al Said, S.
Asner, D. M.
Atmacan, H.
Aulchenko, V.
Aushev, T.
Ayad, R.
Babu, V.
Bahinipati, S.
Behera, P.
Belous, K.
Bennett, J.
Bessner, M.
Bhardwaj, V.
Bhuyan, B.
Bilka, T.
Bodrov, D.
Bonvicini, G.
Borah, J.
Bozek, A.
Bracko, M.
Branchini, P.
Browder, T. E.
Budano, A.
Cervenkov, D.
Chen, A.
Cheon, B. G.
Chilikin, K.
Cho, K.
Cho, S. -j.
Choi, S. -k.
Choi, Y.
Choudhury, S.
Cinabro, D.
Dash, N.
De Pietro, G.
Dhamija, R.
Di Capua, F.
Dolezal, Z.
Dong, T. V.
Dossett, D.
Epifanov, D.
Frey, A.
Fulsom, B. G.
Garg, R.
Gaur, V.
Gabyshev, N.
Garmash, A.
机构：
来源：
PHYSICAL REVIEW D | 2023年 / 107卷 / 05期
基金：
澳大利亚研究理事会; 中国国家自然科学基金; 美国能源部; 欧盟地平线“2020”; 欧洲研究理事会; 新加坡国家研究基金会; 日本学术振兴会; 瑞士国家科学基金会; 奥地利科学基金会; 美国国家科学基金会;
关键词：
STANDARD MODEL; ASYMMETRY;
D O I：
10.1103/PhysRevD.107.052001
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We measure the branching fraction for the Cabibbo-suppressed decay D0 -> K0SK0S pi+pi- and search for CP violation via a measurement of the CP asymmetry ACP as well as the T-odd triple-product asymmetry aTCP. We use 922 fb-1 of data recorded by the Belle experiment, which ran at the KEKB asymmetric-energy e+e- collider. The branching fraction is measured relative to the Cabibbo-favored normalization channel D0 -> K0S pi+pi-; the result is B(D0 -> K0SK0S pi+pi-)=[4.79 +/- 0.08(stat)+/- 0.10(syst)+/- 0.31(norm)]x10-4, where the first uncertainty is statistical, the second is systematic, and the third is from uncertainty in the normalization channel. We also measure ACP=[-2.51 +/- 1.44(stat)+0.11-0.10(syst)]%, and aTCP=[-1.95 +/- 1.42(stat)+0.14-0.12(syst)]%. These results show no evidence of CP violation.
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页数：10
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