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Please use this identifier to cite or link to this item: http://idr.iitbbs.ac.in/jspui/handle/2008/1983
Title: Measurement of the ? Michel parameters ? and ?? in the radiative leptonic decay ? - ? l - ? ? ? l ?
Authors: Shimizu N.
Aihara H.
Epifanov D.
Adachi I.
Said S.Al.
Asner D.M.
Aulchenko V.
Aushev T.
Ayad R.
Babu V.
Badhrees I.
Bakich A.M.
Bansa V.
Barberio E.
Bhardwaj V.
Bhuyan B.
Biswal J.
Bobrov A.
Bozek A.
Bra?ko M.
Browder T.E.
?ervenkov D.
Chang M.-C.
Chang P.
Chekelian V.
Chen A.
Cheon B.G.
Chilikin K.
Cho K.
Choi S.-K.
Choi Y.
Cinabro D.
Czank T.
Dash N.
Di Carlo S.
Dole�al Z.
Dutta D.
Eidelman S.
Fast J.E.
Ferber T.
Fulsom B.G.
Garg R.
Gaur V.
Gabyshev N.
Garmash A.
Gelb M.
Goldenzweig P.
Greenwald D.
Guido E.
Haba J.
Hayasaka K.
Hayashii H.
Hedges M.T.
Hirose S.
Hou W.-S.
Iijima T.
Inami K.
Inguglia G.
Ishikawa A.
Itoh R.
Iwasaki M.
Jaegle I.
Jeon H.B.
Jia S.
Jin Y.
Joo K.K.
Julius T.
Kang K.H.
Karyan G.
Kawasaki T.
Kiesling C.
Kim D.Y.
Kim J.B.
Kim S.H.
Kim Y.J.
Kinoshita K.
Kody� P.
Korpar S.
Kotchetkov D.
Kri�an P.
Kroeger R.
Krokovny P.
Kulasiri R.
Kuzmin A.
Kwon Y.-J.
Lange J.S.
Lee I.S.
Li L.K.
Li Y.
Gioi L.Li.
Libby J.
Liventsev D.
Masuda M.
Merola M.
Miyabayashi K.
Miyata H.
Mohanty G.B.
Moon H.K.
Mori T.
Mussa R.
Nakano E.
Nakao M.
Nanut T.
Nath K.J.
Natkaniec Z.
Nayak M.
Niiyama M.
Nisar N.K.
Nishida S.
Ogawa S.
Okuno S.
Ono H.
Pakhlova G.
Pal B.
Park C.W.
Park H.
Paul S.
Pedlar T.K.
Pestotnik R.
Piilonen L.E.
Popov V.
Ritter M.
Rostomyan A.
Sakai Y.
Salehi M.
Sandilya S.
Sato Y.
Savinov V.
Schneider O.
Schnell G.
Schwanda C.
Seino Y.
Senyo K.
Sevior M.E.
Shebalin V.
Shibata T.-A.
Shiu J.-G.
Shwartz B.
Sokolov A.
Solovieva E.
Stari? M.
Strube J.F.
Sumisawa K.
Sumiyoshi T.
Tamponi U.
Tanida K.
Tenchini F.
Trabelsi K.
Uchida M.
Uglov T.
Unno Y.
Uno S.
Usov Y.
Van Hulse C.
Varner G.
Vorobyev V.
Vossen A.
Wang C.H.
Wang M.-Z.
Wang P.
Watanabe M.
Widmann E.
Won E.
Yamashita Y.
Ye H.
Yuan C.Z.
Zhang Z.P.
Zhilich V.
Zhukova V.
Zhulanov V.
Zupanc A.
Issue Date: 2018
Abstract: We present a measurement of the Michel parameters of the ? lepton, ? and ??, in the radiative leptonic decay ? - ? l - ? ? ? l ? using 711 fb -1 of collision data collected with the Belle detector at the KEKB e + e - collider. The Michel parameters are measured in an unbinned maximum likelihood fit to the kinematic distribution of e + e - ? ? + ? - ? (? + ? 0 ? ? )(l - ? ? ? l ?)(l = e or ? The measured values of the Michel parameters are ? = -1.3 � 1.5 � 0.8 and ?? = 0.5 � 0.4 � 0.2, where the first error is statistical and the second is systematic. This is the first measurement of these parameters. These results are consistent with the Standard Model predictions within their uncertainties, and constrain the coupling constants of the generalized weak interaction. � The Author(s) 2018.
URI: http://dx.doi.org/10.1093/ptep/pty003
http://10.10.32.48:8080/jspui/handle/2008/1983
Appears in Collections:Research Publications

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