Search for invisible decay of the Upsilon(1S)

O Tajima; H Hayashii; M Hazumi; K Inami; Y Iwasaki; S Uehara; K Abe; I Adachi; H Aihara; D Anipko; V Aulchenko; A M Bakich; E Barberio; I Bedny; K Belous; U Bitenc; I Bizjak; A Bondar; A Bozek; M Bracko; T E Browder; M-C Chang; A Chen; K-F Chen; W T Chen; B G Cheon; R Chistov; Y Choi; Y K Choi; S Cole; J Dalseno; M Danilov; M Dash; A Drutskoy; S Eidelman; S Fratina; N Gabyshev; T Gershon; A Go; G Gokhroo; H Ha; J Haba; K Hayasaka; D Heffernan; T Hokuue; Y Hoshi; S Hou; W-S Hou; T Iijima; K Ikado; A Ishikawa; H Ishino; R Itoh; M Iwasaki; J H Kang; S U Kataoka; N Katayama; H Kawai; T Kawasaki; H R Khan; H Kichimi; H J Kim; S K Kim; Y J Kim; K Kinoshita; S Korpar; P Krizan; P Krokovny; R Kumar; C C Kuo; A Kuzmin; Y-J Kwon; J S Lange; J Lee; M J Lee; T Lesiak; A Limosani; S-W Lin; D Liventsev; G Majumder; F Mandl; T Matsumoto; S McOnie; K Miyabayashi; H Miyake; H Miyata; Y Miyazaki; R Mizuk; T Mori; J Mueller; I Nakamura; E Nakano; M Nakao; H Nakazawa; Z Natkaniec; S Nishida; O Nitoh; S Noguchi; T Nozaki; S Ogawa; T Ohshima; S Okuno; S L Olsen; Y Onuki; H Ozaki; P Pakhlov; G Pakhlova; H Park; R Pestotnik; L E Piilonen; H Sahoo; Y Sakai; N Satoyama; T Schietinger; O Schneider; J Schümann; A J Schwartz; R Seidl; K Senyo; M E Sevior; M Shapkin; H Shibuya; B Shwartz; J B Singh; A Sokolov; A Somov; N Soni; S Stanic; M Staric; H Stoeck; K Sumisawa; T Sumiyoshi; S Suzuki; F Takasaki; K Tamai; N Tamura; M Tanaka; G N Taylor; Y Teramoto; X C Tian; I Tikhomirov; K Trabelsi; T Tsuboyama; T Tsukamoto; T Uglov; S Uno; P Urquijo; Y Ushiroda; Y Usov; G Varner; S Villa; C C Wang; C H Wang; M-Z Wang; Y Watanabe; R Wedd; J Wicht; E Won; Q L Xie; B D Yabsley; A Yamaguchi; Y Yamashita; M Yamauchi; Z P Zhang; V Zhilich; A Zupanc

doi:10.1103/PhysRevLett.98.132001

Search for invisible decay of the Upsilon(1S)

Phys Rev Lett. 2007 Mar 30;98(13):132001. doi: 10.1103/PhysRevLett.98.132001. Epub 2007 Mar 27.

Authors

O Tajima¹, H Hayashii, M Hazumi, K Inami, Y Iwasaki, S Uehara, K Abe, I Adachi, H Aihara, D Anipko, V Aulchenko, A M Bakich, E Barberio, I Bedny, K Belous, U Bitenc, I Bizjak, A Bondar, A Bozek, M Bracko, T E Browder, M-C Chang, A Chen, K-F Chen, W T Chen, B G Cheon, R Chistov, Y Choi, Y K Choi, S Cole, J Dalseno, M Danilov, M Dash, A Drutskoy, S Eidelman, S Fratina, N Gabyshev, T Gershon, A Go, G Gokhroo, H Ha, J Haba, K Hayasaka, D Heffernan, T Hokuue, Y Hoshi, S Hou, W-S Hou, T Iijima, K Ikado, A Ishikawa, H Ishino, R Itoh, M Iwasaki, J H Kang, S U Kataoka, N Katayama, H Kawai, T Kawasaki, H R Khan, H Kichimi, H J Kim, S K Kim, Y J Kim, K Kinoshita, S Korpar, P Krizan, P Krokovny, R Kumar, C C Kuo, A Kuzmin, Y-J Kwon, J S Lange, J Lee, M J Lee, T Lesiak, A Limosani, S-W Lin, D Liventsev, G Majumder, F Mandl, T Matsumoto, S McOnie, K Miyabayashi, H Miyake, H Miyata, Y Miyazaki, R Mizuk, T Mori, J Mueller, I Nakamura, E Nakano, M Nakao, H Nakazawa, Z Natkaniec, S Nishida, O Nitoh, S Noguchi, T Nozaki, S Ogawa, T Ohshima, S Okuno, S L Olsen, Y Onuki, H Ozaki, P Pakhlov, G Pakhlova, H Park, R Pestotnik, L E Piilonen, H Sahoo, Y Sakai, N Satoyama, T Schietinger, O Schneider, J Schümann, A J Schwartz, R Seidl, K Senyo, M E Sevior, M Shapkin, H Shibuya, B Shwartz, J B Singh, A Sokolov, A Somov, N Soni, S Stanic, M Staric, H Stoeck, K Sumisawa, T Sumiyoshi, S Suzuki, F Takasaki, K Tamai, N Tamura, M Tanaka, G N Taylor, Y Teramoto, X C Tian, I Tikhomirov, K Trabelsi, T Tsuboyama, T Tsukamoto, T Uglov, S Uno, P Urquijo, Y Ushiroda, Y Usov, G Varner, S Villa, C C Wang, C H Wang, M-Z Wang, Y Watanabe, R Wedd, J Wicht, E Won, Q L Xie, B D Yabsley, A Yamaguchi, Y Yamashita, M Yamauchi, Z P Zhang, V Zhilich, A Zupanc

Affiliation

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

PMID: 17501190
DOI: 10.1103/PhysRevLett.98.132001

Abstract

We report results of a search for the invisible decay of the Upsilon(1S) via the Upsilon(3S)-->pi+ pi- Upsilon(1S) transition using a data sample of 2.9 fb-1 at the Upsilon(3S) resonance. The data were collected with the Belle detector at the KEKB asymmetric-energy e+ e- collider. No signal is found, and an upper limit for the branching fraction at the 90% confidence level is determined to be B(Upsilon(1S)-->invisible)<2.5 x 10(-3).