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Measurement of the Branching Fraction Br(Lambda_c+ -> p K- pi+)

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arxiv 1312.7826 v2 pith:APDBMXOR submitted 2013-12-30 hep-ex

Measurement of the Branching Fraction Br(Lambda_c+ -> p K- pi+)

A. Zupanc , C. Bartel , N. Gabyshev , I. Adachi , H. Aihara , D. M. Asner , V. Aulchenko , T. Aushev
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A. M. Bakich A. Bala K. Belous B. Bhuyan A. Bondar G. Bonvicini A. Bozek M. Bra\v{c}ko T. E. Browder D. \v{C}ervenkov 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. Dole\v{z}al Z. Dr\'asal 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. Kody\v{s} S. Korpar P. Kri\v{z}an 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. Petri\v{c} L. E. Piilonen M. Ritter M. R\"ohrken 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. Stani\v{c} M. Stari\v{c} 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
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classification hep-ex
keywords lambdabranchingfractionanti-pfirstmeasurementabsoluteasymmetric-energy
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We present the first model-independent measurement of the absolute branching fraction of the Lambda_c+ -> p K- 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(*)- anti-p pi+ system in events of the type e+e- -> D(*)- anti-p pi+ Lambda_c+. The branching fraction is measured to be Br(Lambda_c+ -> p K- pi+) = (6.84 +- 0.24^{+0.21}_{-0.27})%, where the first and second uncertainties are statistical and systematic, respectively.

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