Measurement of the branching fraction B(Λc+ → pK-π+). A Zupanc , C Bartel , N Gabyshev , I Adachi , H Aihara , D M Asner , V Aulchenko , T Aushev , A M Bakich , A Bala , K Belous , B Bhuyan , A Bondar , G Bonvicini , A Bozek , M Bračko , T E Browder , D Červenkov , M-C Chang , V Chekelian , B G Cheon , K Chilikin , R Chistov , I-S Cho , K Cho , V Chobanova , S-K Choi , Y Choi , D Cinabro , J Dalseno , M Danilov , Z Doležal , Z Drásal , D Dutta , K Dutta , S Eidelman , D Epifanov , H Farhat , J E Fast , M Feindt , T Ferber , V Gaur , S Ganguly , A Garmash , R Gillard , R Glattauer , Y M Goh , B Golob , J Haba , K Hayasaka , H Hayashii , X H He , Y Hoshi , W-S Hou , M Huschle , H J Hyun , T Iijima , A Ishikawa , R Itoh , Y Iwasaki , T Iwashita , I Jaegle , T Julius , J H Kang , E Kato , Y Kato , T Kawasaki , H Kichimi , D Y Kim , H J Kim , J B Kim , J H Kim , M J Kim , Y J Kim , K Kinoshita , J Klucar , B R Ko , P Kodyš , S Korpar , P Križan , P Krokovny , B Kronenbitter , T Kuhr , T Kumita , A Kuzmin , Y-J Kwon , S-H Lee , J Li , Y Li , J Libby , C Liu , Y Liu , Z Q Liu , D Liventsev , J MacNaughton , K Miyabayashi , H Miyata , R Mizuk , G B Mohanty , A Moll , R Mussa , E Nakano , M Nakao , H Nakazawa , Z Natkaniec , M Nayak , E Nedelkovska , M Niiyama , N K Nisar , S Nishida , O Nitoh , S Ogawa , S L Olsen , W Ostrowicz , P Pakhlov , G Pakhlova , C W Park , H Park , H K Park , T K Pedlar , R Pestotnik , M Petrič , L E Piilonen , M Ritter , M Röhrken , A Rostomyan , S Ryu , H Sahoo , T Saito , Y Sakai , S Sandilya , L Santelj , T Sanuki , V Savinov , O Schneider , G Schnell , C Schwanda , D Semmler , K Senyo , O Seon , M E Sevior , M Shapkin , C P Shen , T-A Shibata , J-G Shiu , B Shwartz , A Sibidanov , F Simon , Y-S Sohn , A Sokolov , E Solovieva , S Stanič , M Starič , M Steder , T Sumiyoshi , U Tamponi , K Tanida , G Tatishvili , Y Teramoto , K Trabelsi , M Uchida , S Uehara , Y Unno , S Uno , P Urquijo , Y Usov , C Van Hulse , P Vanhoefer , G Varner , K E Varvell , A Vinokurova , V Vorobyev , M N Wagner , C H Wang , P Wang , X L Wang , M Watanabe , Y Watanabe , K M Williams , E Won , H Yamamoto , Y Yamashita , S Yashchenko , Y Yook , Z P Zhang , V Zhilich , V Zhulanov , Physical review letters（2014）
摘要
We present the first model-independent measurement of the absolute branching fraction of the Λ(c)(+) → pK(-)π(+) decay using a data sample of 978 fb(-1) collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The number of Λ(c)(+) baryons is determined by reconstructing the recoiling D((*)-) pπ(+) system in events of the type e(+)e(-) → D((*)-) pπ(+)Λ(c)(+). The branching fraction is measured to be B(Λ(c)(+) → pK(-)π(+)) = (6.84 ± 0.24(-0.27)(+0.21))%, where the first and second uncertainties are statistical and systematic, respectively.
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