Measurement of the tau Lepton Polarization and R(D*) in the Decay (B)over-bar -> D* tau(-) (v)over-bar(tau)

  • Hirose, S.
  • Iijima, T.
  • Adachi, I.
  • Adamczyk, K.
  • Aihara, H.
  • ... Cheon, B. G.
  • 외 188명
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초록

We report the first measurement of the tau lepton polarization P-tau(D*) in the decay (B) over bar -> D* tau(-) (v) over bar (tau) as well as a newmeasurement of the ratio of the branching fractions R(D*) = B((B) over bar -> D* tau(-) (v) over bar (tau)) / B((B) over bar -> D* l(-) (v) over bar (l)), where l(-) denotes an electron or a muon, and the tau is reconstructed in the modes tau(-) -> pi(-) v(tau) and tau(-) -> rho(-) v(tau). We use the full data sample of 772 x 10(6) B (B) over bar pairs recorded with the Belle detector at the (KEKB) over bar electron-positron collider. Our results, P-tau(D*) = -0.38 +/- 0.51 (stat)(-0.16)(+0.21) (syst) and R(D*) = 0.270 +/- 0.035 (stat)(- 0.025)(+0.028) (syst), are consistent with the theoretical predictions of the standard model.

제목
Measurement of the tau Lepton Polarization and R(D*) in the Decay (B)over-bar -> D* tau(-) (v)over-bar(tau)
저자
Hirose, S.Iijima, T.Adachi, I.Adamczyk, K.Aihara, H.Al Said, S.Asner, D. M.Atmacan, H.Aulchenko, V.Aushev, T.Ayad, R.Babu, V.Badhrees, I.Bakich, A. M.Bansal, V.Barberio, E.Behera, P.Berger, M.Bhuyan, B.Biswal, J.Bondar, A.Bonvicini, G.Bozek, A.Bracko, M.Browder, T. E.Cervenkov, D.Chang, P.Chen, A.Cheon, B. G.Chilikin, K.Chistov, R.Cho, K.Choi, Y.Cinabro, D.Danilov, M.Dash, N.Di Carlo, S.Dingfelder, J.Dolezal, Z.Drasal, Z.Dutta, D.Eidelman, S.Epifanov, D.Farhat, H.Fast, J. E.Ferber, T.Fulsom, B. G.Gaur, V.Gabyshev, N.Garmash, A.Goldenzweig, P.Golob, B.Greenwald, D.Grygier, J.Haba, J.Hara, K.Hasenbusch, J.Hayasaka, K.Hayashii, H.Higuchi, T.Hou, W. -S.Hsu, C. -L.Inami, K.Inguglia, G.Ishikawa, A.Itoh, R.Iwasaki, Y.Jacobs, W. W.Jaegle, I.Jin, Y.Joffe, D.Joo, K. K.Julius, T.Kato, Y.Kawasaki, T.Kichimi, H.Kiesling, C.Kim, D. Y.Kim, J. B.Kim, K. T.Kim, M. J.Kim, S. H.Kinoshita, K.Kodys, P.Korpar, S.Kotchetkov, D.Krizan, P.Krokovny, P.Kuhr, T.Kulasiri, R.Kumar, R.Kwon, Y. -J.Lange, J. S.Li, C. H.Li, L.Li, Y.Gioi, L. LiLibby, J.Liventsev, D.Lubej, M.Luo, T.MacNaughton, J.Masuda, M.Matsuda, T.Matvienko, D.Miyabayashi, K.Miyake, H.Miyata, H.Mizuk, R.Mohanty, G. B.Moon, H. K.Mori, T.Mussa, R.Nakao, M.Nanut, T.Nath, K. J.Natkaniec, Z.Nayak, M.Niiyama, M.Nisar, N. K.Nishida, S.Ogawa, S.Okuno, S.Ono, H.Onuki, Y.Ostrowicz, W.Pakhlov, P.Pakhlova, G.Pal, B.Park, C. W.Park, H.Paul, S.Pesantez, L.Pestotnik, R.Piilonen, L. E.Prasanth, K.Ritter, M.Rostomyan, A.Rozanska, M.Sakai, Y.Sandilya, S.Santelj, L.Sanuki, T.Sato, Y.Savinov, V.Schlueter, T.Schneider, O.Schnell, G.Schwanda, C.Seino, Y.Senyo, K.Seon, O.Sevior, M. E.Shebalin, V.Shen, C. P.Shibata, T. -A.Shiu, J. -G.Simon, F.Sokolov, A.Solovieva, E.Staric, M.Strube, J. F.Sumisawa, K.Sumiyoshi, T.Takizawa, M.Tamponi, U.Tenchini, F.Trabelsi, K.Uchida, M.Uglov, T.Unno, Y.Uno, S.Urquijo, P.Ushiroda, Y.Usov, Y.Van Hulse, C.Varner, G.Varvell, K. E.Vossen, A.Wang, C. H.Wang, M. -Z.Wang, P.Watanabe, M.Watanabe, Y.Widmann, E.Won, E.Yamashita, Y.Ye, H.Yelton, J.Yuan, C. Z.Zhang, Z. P.Zhilich, V.Zhulanov, V.Zupanc, A.
DOI
10.1103/PhysRevLett.118.211801
발행일
2017-05
유형
Article
저널명
Physical Review Letters
118
21
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