Measurement of the branching fractions and the invariant mass distributions forτ−→h−h+h−ντdecays

M J Lee,T Aushev,R Pestotnik,Z P Zhang,H Hayashii,B Shwartz,Y Choi,H J Kim,R Wedd,W Dungel,M E Sevior,Y Liu,Y J Kim,O Nitoh,B R Ko,S Uehara,C Kiesling,T Kumita,G N Taylor,Y Miyazaki,S Mconie,S Stanič,S K Kim,E Nakano,M Bračko,P Wang,P Krokovny,M Nakao,T Ohshima,Y Watanabe,C Liu,N Katayama,Y Hoshi,P Pakhlov,O Zyukova,C Z Yuan,V Shebalin,K Inami,C W Park,S L Olsen,S Nishida,P Smerkol,T Kawasaki,M Shapkin,A Kuzmin,K Ueno,P Chen,C P Shen,Y Ushiroda,I Tikhomirov,Y Yamashita,D Epifanov,O Schneider,J B Singh,S Ogawa,M Petrič,L E Piilonen,C H Wang,T Iijima,S Ryu,J Li,Y Sakai,R Louvot,D H Kah,E Won,P Urquijo,J H Kang,J Macnaughton,H Miyata,M Bischofberger,K Senyo,H Park,A Bay,S Okuno,G Pakhlova,E Solovieva,W.-S Hou,A Chen,Y Iwasaki,P Križan,A Zupanc,Y Usov,M Iwasaki,M Starič,V Aulchenko,S Uno,H K Park,T E Browder,H Sahoo,Y Teramoto,S Eidelman,L S Peak,A Garmash,K Hayasaka,K Belous,Y I Kim,T Julius,Z Natkaniec,P Chang,J Dalseno,A Vinokurova,J H Kim,H O Kim,V Zhilich,B G Cheon,H Ha,J S Lange,R Itoh,H Aihara,A Sokolov,V Bhardwaj,H J Hyun,T Sumiyoshi,A Bondar,G Varner,Y Hasegawa,H Nakazawa,A J Schwartz,D Liventsev,K Vervink,S Korpar,Y Unno,A M Bakich,N Gabyshev,V Zhulanov,M Yamauchi,A Poluektov,M Fujikawa,C C Zhang,K Arinstein,F Mandl,J Haba,H Pałka ,Arun Das ,Y J Kwon ,E L Barberio ,B Y Han ,I S Cho ,Kenichi Sakai ,T Živko ,S H Kyeong ,J G Shiu ,A Bożek ,Takashi Mori ,S H Lee ,Y Hsiung ,B Yabsley

doi:10.1103/physrevd.81.113007

Abstract

We present a study of tau->pipipinu, tau->Kpipinu, tau->KKpinu, and tau->KKKnu decays using a 666 fb-1 data sample collected with the Belle detector at the KEKB asymmetric-energy e+e- collider at and near a center-of-mass energy of 10.58 GeV. The branching fractions are measured to be: B(tau->pipipinu) = (8.42+-0.01+0.26-0.25) x 10^-2, B(tau->Kpipinu) = (3.30+-0.01+0.16-0.17) x 10^-3, B(tau->KKpinu) = (1.55+-0.01+0.06-0.05) x 10^-3, and B(tau->KKKnu) = (3.29+-0.17+0.19-0.20) x 10^-5, where the first uncertainty is statistical and the second is systematic. These branching fractions do not include contributions from modes in which a pi^+pi^- pair originates from a Ks decay. We also present the unfolded invariant mass distributions for these decays.

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