Measurement of the Tau Michel Parameters (Eta)Over-Bar and Xi Kappa in the Radiative Leptonic Decay Tau(-) -> L(-)Nu(Tau)(Nu)Over-Bar(L)Gamma

Thumbnail
View/Open
Date
2018-02
Author
Shimizu, N.
Aihara, H.
Epifanov, D.
Adachi, I.
Al Said, S.
Asner, D. M.
Aulchenko, V.
Aushev, T.
Ayad, R.
Babu, V.
Badhrees, I.
Bakich, A. M.
Bansal, V.
Barberio, E.
Bhardwaj, V.
Bhuyan, B.
Biswal, J.
Bobrov, A.
Bozek, A.
Bracko, M.
Browder, T. E.
Cervenkov, 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.
Dolezal, 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.
Kodys, P.
Korpar, S.
Kotchetkov, D.
Krizan, 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, Gunar
Schwanda, C.
Seino, Y.
Senyo, K.
Sevior, M. E.
Shebalin, V.
Shibata, T. A.
Shiu, J. G.
Shwartz, B.
Sokolov, A.
Solovieva, E.
Staric, 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, Charlotte Barbara
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 Zhukova, Valentina ORCID
Zhulanov, V.
Zupanc, A.
Metadata
Show full item record
  Estadisticas en RECOLECTA
(LA Referencia)

Progress of Theoretical and Experimental Physics 2018 (2) : (2018) // Article ID 023C01
URI
http://hdl.handle.net/10810/29524
Abstract
We present a measurement of the Michel parameters of the tau lepton, (eta) over bar and xi kappa, in the radiative leptonic decay tau(-) -> l(-)nu(tau)(nu) over bar (l)gamma 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(-) -> tau(+)tau(-) -> (pi(+)pi(0)(nu) over bar (tau))(l(-)nu(tau)(nu) over bar (l)gamma) (l = e or mu). The measured values of the Michel parameters are (eta) over bar = - 1.3 +/- 1.5 +/- 0.8 and xi kappa = 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.
Collections
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. Funded by SCOAP3
Except where otherwise noted, this item's license is described as This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. Funded by SCOAP3