Evidence for B- → τ- ν(τ) with a hadronic tagging method using the full data sample of Belle

K Hara; Y Horii; T Iijima; I Adachi; H Aihara; D M Asner; T Aushev; T Aziz; A M Bakich; M Barrett; V Bhardwaj; B Bhuyan; A Bondar; G Bonvicini; A Bozek; M Bračko; T E Browder; V Chekelian; A Chen; P Chen; B G Cheon; K Chilikin; I-S Cho; K Cho; Y Choi; D Cinabro; J Dalseno; J Dingfelder; Z Doležal; Z Drásal; A Drutskoy; D Dutta; S Eidelman; D Epifanov; S Esen; H Farhat; A Frey; V Gaur; N Gabyshev; S Ganguly; R Gillard; Y M Goh; B Golob; J Haba; T Hara; K Hayasaka; H Hayashii; T Higuchi; Y Hoshi; K Inami; A Ishikawa; R Itoh; Y Iwasaki; T Iwashita; T Julius; J H Kang; T Kawasaki; C Kiesling; H O Kim; J B Kim; J H Kim; K T Kim; M J Kim; Y J Kim; K Kinoshita; J Klucar; B R Ko; P Kodyš; S Korpar; R T Kouzes; P Križan; P Krokovny; B Kronenbitter; T Kuhr; T Kumita; A Kuzmin; Y-J Kwon; J S Lange; S-H Lee; J Li; Y Li; J Libby; C Liu; Y Liu; Z Q Liu; D Liventsev; D Matvienko; K Miyabayashi; H Miyata; R Mizuk; G B Mohanty; A Moll; T Mori; N Muramatsu; E Nakano; M Nakao; H Nakazawa; Z Natkaniec; M Nayak; C Ng; N K Nisar; S Nishida; K Nishimura; O Nitoh; T Nozaki; T Ohshima; S Okuno; S L Olsen; C Oswald; H Ozaki; P Pakhlov; G Pakhlova; C W Park; H K Park; T K Pedlar; R Pestotnik; M Petrič; L E Piilonen; M Prim; M Röhrken; S Ryu; H Sahoo; K Sakai; Y Sakai; S Sandilya; D Santel; T Sanuki; Y Sato; O Schneider; G Schnell; C Schwanda; A J Schwartz; K Senyo; O Seon; M E Sevior; M Shapkin; C P Shen; T-A Shibata; J-G Shiu; B Shwartz; A Sibidanov; F Simon; P Smerkol; Y-S Sohn; A Sokolov; E Solovieva; M Starič; M Sumihama; T Sumiyoshi; G Tatishvili; Y Teramoto; K Trabelsi; T Tsuboyama; M Uchida; S Uehara; Y Unno; S Uno; P Urquijo; Y Ushiroda; Y Usov; C Van Hulse; P Vanhoefer; G Varner; K E Varvell; V Vorobyev; M N Wagner; C H Wang; M-Z Wang; P Wang; M Watanabe; Y Watanabe; K M Williams; E Won; B D Yabsley; H Yamamoto; Y Yamashita; Y Yusa; Z P Zhang; V Zhilich; V Zhulanov; A Zupanc; Belle Collaboration

doi:10.1103/PhysRevLett.110.131801

Evidence for B- → τ- ν(τ) with a hadronic tagging method using the full data sample of Belle

Phys Rev Lett. 2013 Mar 29;110(13):131801. doi: 10.1103/PhysRevLett.110.131801. Epub 2013 Mar 25.

Authors

K Hara¹, Y Horii, T Iijima, I Adachi, H Aihara, D M Asner, T Aushev, T Aziz, A M Bakich, M Barrett, V Bhardwaj, B Bhuyan, A Bondar, G Bonvicini, A Bozek, M Bračko, T E Browder, V Chekelian, A Chen, P Chen, B G Cheon, K Chilikin, I-S Cho, K Cho, Y Choi, D Cinabro, J Dalseno, J Dingfelder, Z Doležal, Z Drásal, A Drutskoy, D Dutta, S Eidelman, D Epifanov, S Esen, H Farhat, A Frey, V Gaur, N Gabyshev, S Ganguly, R Gillard, Y M Goh, B Golob, J Haba, T Hara, K Hayasaka, H Hayashii, T Higuchi, Y Hoshi, K Inami, A Ishikawa, R Itoh, Y Iwasaki, T Iwashita, T Julius, J H Kang, T Kawasaki, C Kiesling, H O Kim, J B Kim, J H Kim, K T Kim, M J Kim, Y J Kim, K Kinoshita, J Klucar, B R Ko, P Kodyš, S Korpar, R T Kouzes, P Križan, P Krokovny, B Kronenbitter, T Kuhr, T Kumita, A Kuzmin, Y-J Kwon, J S Lange, S-H Lee, J Li, Y Li, J Libby, C Liu, Y Liu, Z Q Liu, D Liventsev, D Matvienko, K Miyabayashi, H Miyata, R Mizuk, G B Mohanty, A Moll, T Mori, N Muramatsu, E Nakano, M Nakao, H Nakazawa, Z Natkaniec, M Nayak, C Ng, N K Nisar, S Nishida, K Nishimura, O Nitoh, T Nozaki, T Ohshima, S Okuno, S L Olsen, C Oswald, H Ozaki, P Pakhlov, G Pakhlova, C W Park, H K Park, T K Pedlar, R Pestotnik, M Petrič, L E Piilonen, M Prim, M Röhrken, S Ryu, H Sahoo, K Sakai, Y Sakai, S Sandilya, D Santel, T Sanuki, Y Sato, O Schneider, G Schnell, C Schwanda, A J Schwartz, K Senyo, O Seon, M E Sevior, M Shapkin, C P Shen, T-A Shibata, J-G Shiu, B Shwartz, A Sibidanov, F Simon, P Smerkol, Y-S Sohn, A Sokolov, E Solovieva, M Starič, M Sumihama, T Sumiyoshi, G Tatishvili, Y Teramoto, K Trabelsi, T Tsuboyama, M Uchida, S Uehara, Y Unno, S Uno, P Urquijo, Y Ushiroda, Y Usov, C Van Hulse, P Vanhoefer, G Varner, K E Varvell, V Vorobyev, M N Wagner, C H Wang, M-Z Wang, P Wang, M Watanabe, Y Watanabe, K M Williams, E Won, B D Yabsley, H Yamamoto, Y Yamashita, Y Yusa, Z P Zhang, V Zhilich, V Zhulanov, A Zupanc; Belle Collaboration

Affiliation

¹ High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801.

PMID: 23581309
DOI: 10.1103/PhysRevLett.110.131801

Abstract

We measure the branching fraction of B- → τ- ν(τ) using the full Υ(4S) data sample containing 772×10(6) BB pairs collected with the Belle detector at the KEKB asymmetric-energy e+ e- collider. Events with BB pairs are tagged by reconstructing one of the B mesons decaying into hadronic final states, and B- → τ- ν(τ) candidates are detected in the recoil. We find evidence for B- → τ- ν(τ) with a significance of 3.0 standard deviations including systematic errors and measure a branching fraction B(B- → τ- ν(τ))=[0.72(-0.25)(+0.27)(stat)±0.11(syst)]×10(-4).

Publication types

Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

Elementary Particles*
Nuclear Physics / methods*
Quantum Theory*