Observation of the Doubly Cabibbo-Suppressed Decay D^{+}→K^{+}π^{+}π^{-}π^{0} and Evidence for D^{+}→K^{+}ω.

M Ablikim,M N Achasov,P Adlarson,S Ahmed,M Albrecht,A Amoroso, Q An,Anita,X H Bai,Y Bai, O Bakina,R Baldini Ferroli,I Balossino, Y Ban,K Begzsuren,J V Bennett, N Berger,M Bertani,D Bettoni,F Bianchi,J Biernat,J Bloms,A Bortone, I Boyko, R A Briere,H Cai, X Cai,A Calcaterra,G F Cao,N Cao,S A Cetin, J F Chang,W L Chang, G Chelkov,D Y Chen,G Chen, H S Chen, M L Chen, S J Chen,X R Chen,Y B Chen, Z J Chen,W S Cheng,G Cibinetto,F Cossio,X F Cui,H L Dai,J P Dai,X C Dai, A Dbeyssi,R B de Boer, D Dedovich,Z Y Deng,A Denig, I Denysenko,M Destefanis,F De Mori, Y Ding, C Dong,J Dong,L Y Dong,M Y Dong,S X Du, J Fang,S S Fang,Y Fang, R Farinelli, L Fava, F Feldbauer,G Felici, C Q Feng,M Fritsch, C D Fu,Y Fu,X L Gao,Y Gao,Y G Gao, I Garzia, E M Gersabeck,A Gilman,K Goetzen,L Gong,W X Gong,W Gradl,M Greco,L M Gu,M H Gu,S Gu, Y T Gu, C Y Guan,A Q Guo,L B Guo,R P Guo,Y P Guo,A Guskov,S Han,T T Han,T Z Han, X Q Hao,F A Harris,K L He, F H Heinsius,T Held,Y K Heng,M Himmelreich,T Holtmann,Y R Hou,Z L Hou, H M Hu, J F Hu, T Hu, Y Hu,G S Huang,L Q Huang,X T Huang,Y P Huang, Z Huang,N Huesken,T Hussain,W Ikegami Andersson,W Imoehl,M Irshad,S Jaeger,S Janchiv,Q Ji,Q P Ji,X B Ji,X L Ji,H B Jiang,X S Jiang,X Y Jiang, J B Jiao,Z Jiao,S Jin,Y Jin, T Johansson,N Kalantar-Nayestanaki,X S Kang,R Kappert,M Kavatsyuk, B C Ke, I K Keshk,A Khoukaz, P Kiese,R Kiuchi, R Kliemt, L Koch, O B Kolcu, B Kopf,M Kuemmel,M Kuessner,A Kupsc, M G Kurth,W Kühn, J J Lane,J S Lange,P Larin,L Lavezzi,H Leithoff,M Lellmann,T Lenz,C Li,C H Li,Cheng Li,D M Li,F Li,G Li,H B Li,H J Li,J L Li,J Q Li,Ke Li,L K Li,Lei Li,P L Li,P R Li,S Y Li,W D Li,W G Li,X H Li,X L Li,Z B Li,Z Y Li,H Liang,Y F Liang,Y T Liang,L Z Liao,J Libby, C X Lin, B Liu,B J Liu,C X Liu,D Liu,D Y Liu,F H Liu, Fang Liu, Feng Liu,H B Liu,H M Liu,Huanhuan Liu,Huihui Liu,J B Liu,J Y Liu,K Liu,K Y Liu,Ke Liu,L Liu,Q Liu,S B Liu,Shuai Liu,T Liu,X Liu,Y B Liu,Z A Liu,Z Q Liu,Y F Long,X C Lou,F X Lu,H J Lu,J D Lu,J G Lu,X L Lu,Y Lu,Y P Lu, C L Luo, M X Luo, P W Luo,T Luo, X L Luo,S Lusso, X R Lyu,F C Ma,H L Ma,L L Ma,M M Ma,Q M Ma,R Q Ma,R T Ma,X N Ma,X X Ma,X Y Ma,Y M Ma, F E Maas, M Maggiora,S Maldaner,S Malde, Q A Malik,A Mangoni, Y J Mao, Z P Mao,S Marcello,Z X Meng, J G Messchendorp, G Mezzadri,T J Min, R E Mitchell,X H Mo,Y J Mo,N Yu Muchnoi,H Muramatsu, S Nakhoul,Y Nefedov, F Nerling,I B Nikolaev, Z Ning,S Nisar,S L Olsen, Q Ouyang,S Pacetti,X Pan,Y Pan,A Pathak,P Patteri,M Pelizaeus, H P Peng,K Peters,J Pettersson,J L Ping, R G Ping, A Pitka,R Poling,V Prasad,H Qi,H R Qi, M Qi,T Y Qi,S Qian,W-B Qian,Z Qian,C F Qiao,L Q Qin,X S Qin,Z H Qin, J F Qiu,S Q Qu, K H Rashid,K Ravindran,C F Redmer, A Rivetti,V Rodin,M Rolo, G Rong,Ch Rosner,M Rump, A Sarantsev,Y Schelhaas, C Schnier,K Schoenning,D C Shan, W Shan,X Y Shan,M Shao,C P Shen,P X Shen, X Y Shen,H C Shi,R S Shi,X Shi,X D Shi,J J Song,Q Q Song,W M Song,Y X Song, S Sosio, S Spataro,F F Sui,G X Sun,J F Sun,L Sun,S S Sun,T Sun,W Y Sun,X Sun,Y J Sun,Y K Sun,Y Z Sun,Z T Sun,Y H Tan,Y X Tan,C J Tang,G Y Tang,J Tang,V Thoren, I Uman,B Wang, B L Wang,C W Wang, D Y Wang,H P Wang,K Wang, L L Wang,M Wang,M Z Wang,Meng Wang,W H Wang,W P Wang, X Wang, X F Wang, X L Wang,Y Wang, Y D Wang,Y F Wang, Y Q Wang,Z Wang,Z Y Wang,Ziyi Wang,Zongyuan Wang, D H Wei, P Weidenkaff,F Weidner,S P Wen,D J White,U Wiedner,G Wilkinson, M Wolke,L Wollenberg,J F Wu,L H Wu,L J Wu,X Wu,Z Wu,L Xia,H Xiao,S Y Xiao,Y J Xiao,Z J Xiao,X H Xie,Y G Xie,Y H Xie,T Y Xing, X A Xiong,G F Xu,J J Xu, Q J Xu,W Xu,X P Xu, F Yan,L Yan,W B Yan,W C Yan,Xu Yan,H J Yang,H X Yang,L Yang,R X Yang,S L Yang,Y H Yang,Y X Yang,Yifan Yang,Zhi Yang,M Ye,M H Ye, J H Yin,Z Y You,B X Yu,C X Yu,G Yu,J S Yu,T Yu,C Z Yuan,W Yuan,X Q Yuan,Y Yuan,Z Y Yuan,C X Yue, A Yuncu,A A Zafar,Y Zeng, B X Zhang,Guangyi Zhang,H H Zhang,H Y Zhang,J L Zhang,J Q Zhang,J W Zhang,J Y Zhang, J Z Zhang,Jianyu Zhang,Jiawei Zhang,L Zhang,Lei Zhang,S Zhang,S F Zhang, T J Zhang,X Y Zhang,Y Zhang,Y H Zhang,Y T Zhang,Yan Zhang,Yao Zhang,Yi Zhang, Z H Zhang,Z Y Zhang,G Zhao,J Zhao,J Y Zhao,J Z Zhao,Lei Zhao,Ling Zhao,M G Zhao,Q Zhao,S J Zhao,Y B Zhao,Y X Zhao,Z G Zhao,A Zhemchugov,B Zheng,J P Zheng, Y Zheng, Y H Zheng,B Zhong,C Zhong, L P Zhou,Q Zhou,X Zhou,X K Zhou,X R Zhou,A N Zhu,J Zhu,K Zhu,K J Zhu,S H Zhu,W J Zhu, X L Zhu, Y C Zhu,Z A Zhu, B S Zou, J H Zou

PHYSICAL REVIEW LETTERS（2020）

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摘要

Using 2.93 fb(-1) of e(+)e(-) collision data collected at a center-of-mass energy of 3.773 GeV with the BESIII detector, the first observation of the doubly Cabibbo-suppressed decay D+-> K+pi(+)pi(-)pi(0) is reported. After removing decays that contain narrow intermediate resonances, including D+. K+., D+ -> K+ omega, and D+-> K+ phi, the branching fraction of the decay D+ -> K+ pi(+)pi(-)pi(0) is measured to be o1.13 similar to 0.08stat similar to 0.03syst+ x 10(-3). The ratio of branching fractions of D+ -> K+ pi(+)pi(-)pi(0) over D+. K+ pi(+)pi(-)pi(0) is found to be o1.81 similar to 0.15+%, which corresponds to (6.28 +/- 0.52) tan(4)theta(C), where theta(C) is 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 decays D+ -> K+ pi(+)pi(-)pi(0) is also determined, and no evidence for CP violation is found. In addition, the first evidence for the D+ -> K+ -> decay, with a statistical significance of 3.3 sigma, is presented and the branching fraction is measured to be B(D+ -> K+omega) = (5.7(-2.1stat)(+2.5) +/- 0.2(syst)) x 10(-5).

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