Measurements of Absolute Hadronic Branching Fractions of the Λ_{c}^{+} Baryon.

M Ablikim,M N Achasov,X C Ai,O Albayrak,M Albrecht,D J Ambrose,A Amoroso, F F An, Q An,J Z Bai,R Baldini Ferroli, Y Ban,D W Bennett,J V Bennett,M Bertani,D Bettoni,J M Bian,F Bianchi,E Boger, I Boyko,R A Briere,H Cai,X Cai,O Cakir,A Calcaterra,G F Cao,S A Cetin,J F Chang, G Chelkov,G Chen, H S Chen,H Y Chen, J C Chen,M L Chen, S J Chen,X Chen,X R Chen,Y B Chen,H P Cheng, X K Chu,G Cibinetto,H L Dai,J P Dai, A Dbeyssi, 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,Z L Dou,S X Du, P F Duan, E E Eren,J Z Fan, J Fang,S S Fang,X Fang,Y Fang,R Farinelli, L Fava,O Fedorov, F Feldbauer,G Felici, C Q Feng,E Fioravanti,M Fritsch, C D Fu,Q Gao,X L Gao,X Y Gao,Y Gao,Z Gao, I Garzia,K Goetzen,L Gong, W X Gong,W Gradl,M Greco,M H Gu,Y T Gu,Y H Guan,A Q Guo,L B Guo,Y Guo,Y P Guo, Z Haddadi,A Hafner,S Han, X Q Hao,F A Harris,K L He,T Held,Y K Heng,Z L Hou,C Hu,H M Hu, J F Hu, T Hu,Y Hu, G S Huang, J S Huang,X T Huang, Y Huang, T Hussain,Q Ji,Q P Ji,X B Ji,X L Ji,L W Jiang,X S Jiang,X Y Jiang, J B Jiao,Z Jiao, D P Jin,S Jin,T Johansson, A Julin,N Kalantar-Nayestanaki,X L Kang,X S Kang,M Kavatsyuk, B C Ke, P Kiese, R Kliemt, B Kloss,O B Kolcu, B Kopf, M Kornicer,W Kuehn,A Kupsc, J S Lange,M Lara,P Larin,C Leng, C Li, Cheng Li,D M Li,F Li,F Y Li,G Li,H B Li,J C Li,Jin Li,K Li,K Li,Lei Li,P R Li,Q Y Li, T Li,W D Li,W G Li,X L Li,X M Li,X N Li,X Q Li,Z B Li,H Liang,Y F Liang,Y T Liang, G R Liao,D X Lin, B J Liu,C X Liu,D Liu, F H Liu,Fang Liu, Feng Liu, H B Liu,H H Liu,H H Liu,H M Liu, J Liu, J B Liu, J P Liu,J Y Liu, K Liu,K Y Liu,L D Liu,P L Liu,Q Liu, S B Liu,X Liu,Y B Liu,Z A Liu,Zhiqing Liu,H Loehner,X C Lou, H J Lu, J G Lu,Y Lu,Y P Lu,C L Luo,M X Luo,T Luo,X L Luo, X R Lyu, F C Ma,H L Ma,L L Ma,Q M Ma,T Ma,X N Ma,X Y Ma,Y M Ma,F E Maas,M Maggiora, Y J Mao, Z P Mao,S Marcello,J G Messchendorp, J Min, R E Mitchell,X H Mo,Y J Mo,C Morales Morales,N Yu Muchnoi,H Muramatsu,Y Nefedov, F Nerling, I B Nikolaev, Z Ning,S Nisar, S L Niu,X Y Niu,S L Olsen, Q Ouyang,S Pacetti,Y Pan,P Patteri,M Pelizaeus, H P Peng,K Peters,J Pettersson, J L Ping, R G Ping,R Poling,V Prasad, H R Qi, M Qi, S Qian, C F Qiao,L Q Qin,N Qin,X S Qin,Z H Qin, J F Qiu, K H Rashid, C F Redmer, M Ripka, G Rong,Ch Rosner, X D Ruan,V Santoro, A Sarantsev,M Savrié,K Schoenning,S Schumann, W Shan,M Shao,C P Shen,P X Shen,X Y Shen,H Y Sheng,W M Song,X Y Song, S Sosio, S Spataro, G X Sun,J F Sun,S S Sun,Y J Sun,Y Z Sun,Z J Sun,Z T Sun,C J Tang,X Tang,I Tapan, E H Thorndike, M Tiemens,M Ullrich,I Uman, G S Varner,B Wang,B L Wang, D Wang, D Y Wang,K Wang,L L Wang, L S Wang,M Wang,P Wang,P L Wang, S G Wang,W Wang,W P Wang, X F Wang, Y D Wang, Y F Wang, Y Q Wang, Z Wang, Z G Wang, Z H Wang, Z Y Wang,T Weber, D H Wei, J B Wei, P Weidenkaff,S P Wen,U Wiedner,M Wolke,L H Wu,Z Wu,L Xia,L G Xia,Y Xia, D Xiao, H Xiao, Z J Xiao,Y G Xie,Q L Xiu,G F Xu,L Xu,Q J Xu,Q N Xu, X P Xu,L Yan,W B Yan,W C Yan, Y H Yan, H J Yang, H X Yang,L Yang,Y X Yang,M Ye,M H Ye, J H Yin,B X Yu,C X Yu, J S Yu,C Z Yuan,W L Yuan,Y Yuan, A Yuncu,A A Zafar,A Zallo,Y Zeng,Z Zeng, B X Zhang,B Y Zhang,C Zhang,C C Zhang, D H Zhang, H H Zhang,H Y Zhang, J J Zhang,J L Zhang, J Q Zhang, J W Zhang,J Y Zhang,J Z Zhang,K Zhang,L Zhang,X Y Zhang,Y Zhang,Y H Zhang,Y N Zhang,Y T Zhang,Yu Zhang,Z H Zhang,Z P Zhang,Z Y Zhang,G Zhao,J W Zhao,J Y Zhao,J Z Zhao,Lei Zhao,Ling Zhao,M G Zhao,Q Zhao,Q W Zhao,S J Zhao,T C Zhao,Y B Zhao,Z G Zhao,A Zhemchugov,B Zheng,J P Zheng,W J Zheng, Y H Zheng,B Zhong, L Zhou,X Zhou,X K Zhou,X R Zhou,X Y Zhou, K Zhu, K J Zhu, S Zhu, S H Zhu,X L Zhu, Y C Zhu, Y S Zhu,Z A Zhu, J Zhuang, L Zotti,B S Zou, J H Zou

PHYSICAL REVIEW LETTERS（2016）

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摘要

We report the first measurement of absolute hadronic branching fractions of Lambda(+)(c) baryon at the Lambda(+)(c)(Lambda) over bar (-)(c) production threshold, in the 30 years since the Lambda(+)(c) discovery. In total, 12 Cabibbo-favored Lambda(+)(c) hadronic decay modes are analyzed with a double-tag technique, based on a sample of 567 pb(-1) of e(+)e(-) collisions at root s = 4.599 GeV recorded with the BESIII detector. A global least-squares fitter is utilized to improve the measured precision. Among the measurements for twelve Lambda(+)(c) decay modes, the branching fraction for Lambda(+)(c) -> pK(-)pi(+) is determined to be (5.84 +/- 0.27 +/- 0.23)%, where the first uncertainty is statistical and the second is systematic. In addition, the measurements of the branching fractions of the other 11 Cabibbo-favored hadronic decay modes are significantly improved.

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absolute hadronic branching fractions

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