Observation of the Doubly Cabibbo-Suppressed Decay D+ -> K+ pi(+) pi(-) pi(0) and Evidence for D+ -> K+ omega
Observation of the Doubly Cabibbo-Suppressed Decay D+ -> K+ pi(+) pi(-) pi(0) and Evidence for D+ -> K+ omega
复制标题
双卡比博抑制衰变 D -> K pi( ) pi(-) pi(0) 的观察和 D -> K omega 的证据
DOI：
10.1103/physrevlett.125.141802
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发表时间：
2020
影响因子：
8.6
通讯作者：
Briere R. A
中科院分区：
文献类型：
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作者：
Ablikim M.;Achasov M. N.;Adlarson P.;Ahmed S.;Albrecht M.;Amoroso A.;An Q.;Anita;Bai Y.;Bakina O.;Ferroli R. Baldini;Balossino I;Ban Y.;Begzsuren K.;Bennett J. V;Berger N.;Bertani M.;Bettoni D.;Bianchi F.;Biernat J.;Bloms J.;Bortone A.;Boyko I;Briere R. A
利用BESIII探测器在质心能量为3.773 GeV处收集的碰撞数据，首次观测到了双重Cabibbo抑制衰变。在去除包含窄中间共振的衰变之后，包括、和，衰变的分支分数被测量为。发现以上的分支分数之比为，对应于，其中是Cabibbo混合角。这个比例是显着大于相应的比例为其他双重Cabibbo抑制衰变。此外，还首次提出了电荷共轭衰变的证据，其统计显著性为，并测得其分支分数为B（D+→K+ω）=（5.7-2.1+2.5stat±0.2syst）×10-5。
Usingofcollision data collected at a center-of-mass energy of 3.773 GeV with the BESIII detector, the first observation of the doubly Cabibbo-suppressed decayis reported. After removing decays that contain narrow intermediate resonances, including,, and, the branching fraction of the decayis measured to be. The ratio of branching fractions ofoveris found to be, which corresponds to, whereis the Cabibbo mixing angle. This ratio is significantly larger than the corresponding ratios for other doubly Cabibbo-suppressed decays. The asymmetry of the branching fractions of charge-conjugated decaysis also determined, and no evidence forviolation is found. In addition, the first evidence for thedecay, with a statistical significance of, is presented and the branching fraction is measured to be B(D+→K+ω)=(5.7-2.1+2.5stat±0.2syst)×10-5.