Search for lepton-flavor-violating τ → ℓ V0 decays at Belle

Y Nishio; K Inami; T Ohshima; I Adachi; H Aihara; K Arinstein; V Aulchenko; T Aushev; T Aziz; AM Bakich; V Balagura; E Barberio; I Bedny; K Belous; U Bitenc; S Blyth; A Bondar; M Bračko; TE Browder; A Chen; WT Chen; BG Cheon; IS Cho; Y Choi; J Dalseno; M Danilov; M Dash; A Drutskoy; S Eidelman; D Epifanov; N Gabyshev; B Golob; H Ha; J Haba; K Hara; K Hayasaka; H Hayashii; M Hazumi; Y Horii; Y Hoshi; WS Hou; YB Hsiung; T Iijima; A Ishikawa; R Itoh; M Iwasaki; Y Iwasaki; NJ Joshi; DH Kah; H Kaji; JH Kang; N Katayama; H Kawai; T Kawasaki; H Kichimi; YJ Kim; S Korpar; Y Kozakai; P Križan; P Krokovny; R Kumar; CC Kuo; Y Kuroki; A Kuzmin; YJ Kwon; JS Lee; MJ Lee; SE Lee; T Lesiak; A Limosani; Y Liu; D Liventsev; F Mandl; S McOnie; H Miyake; H Miyata; Y Miyazaki; R Mizuk; GR Moloney; T Mori; E Nakano; M Nakao; H Nakazawa; S Nishida; O Nitoh; S Ogawa; S Okuno; H Ozaki; P Pakhlov; G Pakhlova; CW Park; H Park; R Pestotnik; LE Piilonen; A Poluektov; Y Sakai; O Schneider; K Senyo; ME Sevior; M Shapkin

Journal article

Search for lepton-flavor-violating τ → ℓ V0 decays at Belle

Y Nishio, K Inami, T Ohshima, I Adachi, H Aihara, K Arinstein, V Aulchenko, T Aushev, T Aziz, AM Bakich, V Balagura, E Barberio, I Bedny, K Belous, U Bitenc, S Blyth, A Bondar, M Bračko, TE Browder, A Chen Show all

Physics Letters Section B Nuclear Elementary Particle and High Energy Physics | Published : 2008

DOI: 10.1016/j.physletb.2008.05.012

Abstract

We have searched for neutrinoless τ lepton decays into ℓ and V0, where ℓ stands for an electron or muon, and V0 for a vector meson (φ{symbol}, ω, K* 0, over(K, ̄)* 0 or ρ0), using 543 fb-1 of data collected with the Belle detector at the KEKB asymmetric-energy e+ e- collider. No excess of signal events over the expected background has been observed, and we set upper limits on the branching fractions in the range (5.9 - 18) × 10-8 at the 90% confidence level. These upper limits are significantly more restrictive than our previous results for the ℓφ{symbol}, ℓ K* 0, ℓ over(K, ̄)* 0 and ℓ ρ0 modes. © 2008 Elsevier B.V.