Evidence of the purely leptonic decay B- → τ-(v)over-barτ

被引：201

作者：

Ikado, K. ^{[1
]}

Abe, K.

Adachi, I.

Aihara, H.

Akai, K.

Akemoto, M.

Anipko, D.

Arinstein, K.

Aulchenko, V.

Aushev, T.

Aziz, T.

Bakich, A. M.

Balagura, V.

Barbero, M.

Bay, A.

Bedny, I.

Belous, K.

Bitenc, U.

Bizjak, I.

Bondar, A.

Bozek, A.

Bracko, M.

Browder, T. E.

Chang, P.

Chen, A.

Chen, W. T.

Choi, Y.

Cole, S.

Dalseno, J.

Danilov, M.

Dash, M.

Eidelman, S.

Epifanov, D.

Flanagan, J.

Fratina, S.

Furukawa, K.

Gabyshev, N.

Gershon, T.

Go, A.

Gokhroo, G.

Golob, B.

Gorisek, A.

Ha, H.

Haba, J.

Hara, K.

Hara, T.

Hastings, N. C.

Hayasaka, K.

Hayashii, H.

机构：

[1] Budker Inst Nucl Phys, Novosibirsk 630090, Russia

[2] Chiba Univ, Chiba, Japan

[3] Univ Cincinnati, Cincinnati, OH 45221 USA

[4] Goethe Univ Frankfurt, D-6000 Frankfurt, Germany

[5] Univ Hawaii, Honolulu, HI 96822 USA

[6] High Energy Accelerator Res Org, KEK, Tsukuba, Ibaraki, Japan

[7] Inst High Energy Phys, Vienna, Austria

[8] Inst High Energy Phys, Protvino, Russia

[9] Inst Theoret & Expt Phys, Moscow 117259, Russia

[10] Jozef Stefan Inst, Ljubljana, Slovenia

[11] Kanagawa Univ, Yokohama, Kanagawa, Japan

[12] Korea Univ, Seoul 136701, South Korea

[13] Kyungpook Natl Univ, Taegu 702701, South Korea

[14] Ecole Polytech Fed Lausanne, Swiss Fed Inst Technol, CH-1015 Lausanne, Switzerland

[15] Univ Ljubljana, Ljubljana, Slovenia

[16] Univ Maribor, SLO-2000 Maribor, Slovenia

[17] Univ Melbourne, Parkville, Vic 3052, Australia

[18] Nagoya Univ, Nagoya, Aichi, Japan

[19] Nara Womens Univ, Nara 630, Japan

[20] Natl Cent Univ, Chungli 32054, Taiwan

[21] Natl Taiwan Univ, Dept Phys, Taipei 10764, Taiwan

[22] H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland

[23] Nippon Dent Univ, Niigata, Japan

[24] Niigata Univ, Niigata, Japan

[25] Osaka City Univ, Osaka 558, Japan

[26] Osaka Univ, Osaka, Japan

[27] Panjab Univ, Chandigarh 160014, India

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.97.251802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present the first evidence of the decay B-->tau(-)nu(tau), using 414 fb(-1) of data collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. Events are tagged by fully reconstructing one of the B mesons in hadronic modes. We detect the signal with a significance of 3.5 standard deviations including systematics and measure the branching fraction to be B(B-->tau(-)nu(tau))=(1.79(-0.49)(+0.56)(stat)(-0.51)(+0.46)(syst))x10(-4). This implies that f(B)=0.229(-0.031)(+0.036)(stat)(-0.037)(+0.034)(syst) GeV and is the first direct measurement of this quantity.

引用

页数：6

共 13 条

[1] The Belle detector [J].

Abashian, A ;

Abe, K ;

Abe, R ;

Abe, K ;

Adachi, I ;

Ahn, BS ;

Ahn, HS ;

Aihara, H ;

Akatsu, M ;

Akhmetshin, R ;

Alexander, JP ;

Alimonti, G ;

An, Q ;

Aoki, K ;

Asai, M ;

Asano, Y ;

Aso, T ;

Aulchenko, V ;

Bakich, AM ;

Banas, E ;

Behari, S ;

Behera, PK ;

Beiline, D ;

Bondar, A ;

Bozek, A ;

Browder, TE ;

Casey, BCK ;

Chang, P ;

Chang, YH ;

Chao, Y ;

Chen, HS ;

Chen, HF ;

Chen, YQ ;

Cheon, BG ;

Chidzik, S ;

Choi, S ;

Choi, Y ;

Dneprovsky, L ;

Doi, Y ;

Dong, LY ;

Dragic, J ;

Drutskoy, A ;

Eidelman, S ;

Enomoto, R ;

Everton, CW ;

Fang, F ;

Fujii, H ;

Fujimoto, K ;

Fujita, Y ;

Fukunaga, C .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2002, 479 (01) :117-232

[2] RECONSTRUCTION OF B-MESONS [J].

ALBRECHT, H ;

BINDER, U ;

BOCKMANN, P ;

GLASER, R ;

HARDER, G ;

LEMBKEKOPPITZ, I ;

SCHMIDTPARZEFALL, W ;

SCHRODER, H ;

SCHULZ, HD ;

WURTH, R ;

YAGIL, A ;

DONKER, JP ;

DRESCHER, A ;

KAMP, D ;

MATTHIESEN, U ;

SCHECK, H ;

SPAAN, B ;

SPENGLER, J ;

WEGENER, D ;

GABRIEL, JC ;

SCHUBERT, KR ;

STIEWE, J ;

STRAHL, K ;

WALDI, R ;

WESELER, S ;

EDWARDS, KW ;

FRISKEN, WR ;

GILKINSON, DJ ;

GINGRICH, DM ;

KAPITZA, H ;

KIM, PCH ;

KUTSCHKE, R ;

MACFARLANE, DB ;

MCKENNA, JA ;

MCLEAN, KW ;

NILSSON, AW ;

ORR, RS ;

PADLEY, P ;

PARSONS, JA ;

PATEL, PM ;

PRENTICE, JD ;

SEYWERD, HCJ ;

SWAIN, JD ;

TSIPOLITIS, G ;

YOON, TS ;

YUN, JC ;

AMMAR, R ;

COPPAGE, D ;

DAVIS, R ;

KANEKAL, S .

PHYSICS LETTERS B, 1987, 185 (1-2) :218-222

[3]

[Anonymous], HEPEX0603003

[4] Search for the decay B+ → τ+ντ [J].

Aubert, B ;

Barate, R ;

Boutigny, D ;

Couderc, F ;

Karyotakis, Y ;

Lees, JP ;

Poireau, V ;

Tisserand, V ;

Zghiche, A ;

Grauges, E ;

Palano, A ;

Pappagallo, M ;

Pompili, A ;

Chen, JC ;

Qi, ND ;

Rong, G ;

Wang, P ;

Zhu, YS ;

Eigen, G ;

Ofte, I ;

Stugu, B ;

Abrams, GS ;

Battaglia, M ;

Breon, AB ;

Brown, DN ;

Button-Shafer, J ;

Cahn, RN ;

Charles, E ;

Day, CT ;

Gill, MS ;

Gritsan, AV ;

Groysman, Y ;

Jacobsen, RG ;

Kadel, RW ;

Kadyk, J ;

Kerth, LT ;

Kolomensky, YG ;

Kukartsev, G ;

Lynch, G ;

Mir, LM ;

Oddone, PJ ;

Orimoto, TJ ;

Pripstein, M ;

Roe, NA ;

Ronan, MT ;

Wenzel, WA ;

Barrett, M ;

Ford, KE ;

Harrison, TJ ;

Hart, AJ .

PHYSICAL REVIEW D, 2006, 73 (05)

[5] PHYSICS WITH THE CRYSTAL BALL DETECTOR [J].

BLOOM, ED ;

PECK, CW .

ANNUAL REVIEW OF NUCLEAR AND PARTICLE SCIENCE, 1983, 33 :143-197

[6]

BRUN R, 1984, DDEE841 CERN

[7] Review of particle physics [J].

Eidelman, S ;

Hayes, KG ;

Olive, KA ;

Aguilar-Benitez, M ;

Amsler, C ;

Asner, D ;

Babu, KS ;

Barnett, RM ;

Beringer, J ;

Burchat, PR ;

Carone, CD ;

Caso, C ;

Conforto, G ;

Dahl, O ;

D'Ambrosio, G ;

Doser, M ;

Feng, JL ;

Gherghetta, T ;

Gibbons, L ;

Goodman, M ;

Grab, C ;

Groom, DE ;

Gurtu, A ;

Hagiwara, K ;

Hernández-Rey, JJ ;

Hikasa, K ;

Honscheid, K ;

Jawahery, H ;

Kolda, C ;

Kwon, Y ;

Mangano, ML ;

Manohar, AV ;

March-Russell, J ;

Masoni, A ;

Miquel, R ;

Mönig, K ;

Murayama, H ;

Nakamura, K ;

Navas, S ;

Pape, L ;

Patrignani, C ;

Piepke, A ;

Raffelt, G ;

Roos, M ;

Tanabashi, M ;

Terning, J ;

Törnqvist, NA ;

Trippe, TG ;

Vogel, P ;

Wohl, CG .

PHYSICS LETTERS B, 2004, 592 (1-4) :1-1109

[8] B-meson decay constant from unquenched lattice QCD -: art. no. 212001 [J].

Gray, A ;

Wingate, M ;

Davies, CTH ;

Gulez, E ;

Lepage, GP ;

Mason, Q ;

Nobes, M ;

Shigemitsu, J .

PHYSICAL REVIEW LETTERS, 2005, 95 (21)

[9] Recent results from lattice calculations [J].

Hashimoto, S .

INTERNATIONAL JOURNAL OF MODERN PHYSICS A, 2005, 20 (22) :5133-5144

[10] ENHANCED CHARGED-HIGGS-BOSON EFFECTS IN B--]TAU(NU)OVER-BAR, MU(NU)OVER-BAR AND B-]TAU(NU)OVER-BAR PLUS X [J].

HOU, WS .

PHYSICAL REVIEW D, 1993, 48 (05) :2342-2344

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