Measurement Of The Branching Fraction B(Lambda(+)(C) -> Pk(-)Pi(+))

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 Bracko,T E Browder,D Cervenkov,M C Chang,V Chekelian,B G Cheon,K Chilikin,R Chistov,I S Cho,K Cho,V Chobanova,Si Kyung Choi,Y Choi,D Cinabro,J Dalseno, M Danilov,Z Doležal, Z Drasal,Dipanwita Dutta,K Dutta,S Eidelman,D Epifanov,H Farhat, J Fast,M Feindt,T Ferber,V Gaur,Sudershan 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,Jin Ho Kim,M J Kim, Y J Kim,K Kinoshita, J Klucar,B R Ko, P Kodys,S Korpar,P Križan,P Krokovny, B Kronenbitter,T Kuhr,T Kumita,A Kuzmin,Y J Kwon, Seong Ho Lee,Jian Li, Yunxia Li,J Libby, Chen Liu,Yang Liu, Z Q Liu,D Liventsev,J Macnaughton,K Miyabayashi,H Miyata,R Mizuk,G B Mohanty,A Moll

PHYSICAL REVIEW LETTERS（2014）

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Abstract

We present the first model-independent measurement of the absolute branching fraction of the Lambda(+)(c) -> pK(-)pi(+)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 Lambda(+)(c) baryons is determined by reconstructing the recoiling D(*)(-)(p) over bar pi(+)system in events of the type e(+)e(-) -> D(*)(-)(p) over bar pi(+)Lambda(+)(c). The branching fraction is measured to be B(Lambda(+)(c) -> pK(-)pi(+)) = (6.84 +/- 0.24(-0.27)(+0.21))%, where the first and second uncertainties are statistical and systematic, respectively.

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