Measurement of the branching fractions for Cabibbo-suppressed decays D plus -K plus K-π+π0 and D+(s)- K plus π-π+π0 at Belle

被引：0
|
作者：
Li, L. K.
Schwartz, A. J.
Kinoshita, K.
Won, E.
Aihara, H.
Al Said, S.
Asner, D. M.
Atmacan, H.
Aulchenko, V.
Aushev, T.
Ayad, R.
Babu, V.
Bahinipati, S.
Belous, K.
Bennett, J.
Bessner, M.
Bhardwaj, V.
Bilka, T.
Bobrov, A.
Bodrov, D.
Bonvicini, G.
Borah, J.
Bozek, A.
Bracko, M.
Branchini, P.
Browder, T. E.
Budano, A.
Campajola, M.
Cervenkov, D.
Chang, P.
Chen, A.
Cheon, B. G.
Cho, H. E.
Cho, K.
Cho, S. -J.
Choi, S. -K.
Choi, Y.
Choudhury, S.
Cinabro, D.
Cunliffe, S.
Das, S.
Dash, N.
De Nardo, G.
De Pietro, G.
Dhamija, R.
Di Capua, F.
Dolezal, Z.
Dong, T., V
Dossett, D.
Epifanov, D.
机构：
来源：
PHYSICAL REVIEW D | 2023年 / 107卷 / 03期
基金：
瑞士国家科学基金会; 澳大利亚研究理事会; 新加坡国家研究基金会; 美国国家科学基金会; 中国国家自然科学基金; 奥地利科学基金会; 欧盟地平线“2020”; 日本学术振兴会;
关键词：
IDENTIFICATION;
D O I：
10.1103/PhysRevD.107.033003
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present measurements of the branching fractions for the singly Cabibbo-suppressed decays D+ -K+K-x-+x-0 and D+s -K+x--x-+x-0, and the doubly Cabibbo-suppressed decay D+ -K+x--x-+x-0, based on 980 fb-1 of data recorded by the Belle experiment at the KEKB e+e- collider. We measure these modes relative to the Cabibbo-favored modes D+ -K-x-+x-+x-0 and D+s -K+K-x-+x-0. Our results for the ratios of branching fractions are B(D+ -K+K-x-+x-0)/B(D+ -K-x-+x-+x-0) = (11.32 +/- 0.13 +/- 0.26)%, B(D+ -K+x--x-+x-0)/B(D+ -K-x-+x-+x-0) = (1.68 +/- 0.11 +/- 0.03)%, and B(D+s -K+x--x-+x-0)/ B(D+s -K+K-x-+x-0) = (17.13 +/- 0.62 +/- 0.51)%, where the uncertainties are statistical and systematic, respectively. The second value corresponds to (5.83 +/- 0.42) x tan4 BC, where BC is the Cabibbo angle; this value is larger than other measured ratios of branching fractions for a doubly Cabibbo-suppressed charm decay to a Cabibbo-favored decay. Multiplying these results by world average values for B(D+ -K-x-+x-+x-0) and B(D+s -K+K-x-+x-0) yields B(D+ -K+K-x-+x-0) = (7.08 +/- 0.08 +/- 0.16 +/- 0.20) x 10-3, B(D+ -K+x--x-+x-0) = (1.05 +/- 0.07 +/- 0.02 +/- 0.03) x 10-3, and B(D+s -K+x--x-+x-0) = (9.44 +/- 0.34 +/- 0.28 +/- 0.32) x 10-3, where the third uncertainty is due to the branching fraction of the normalization mode. The first two results are consistent with, but more precise than, the current world averages. The last result is the first measurement of this branching fraction.
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