Search for the b→dγ process

D Mohapatra; M Nakao; BD Yabsley; K Abe; K Abe; H Aihara; K Arinstein; Y Asano; T Aushev; T Aziz; S Bahinipati; AM Bakich; E Barberio; M Barbero; I Bedny; U Bitenc; I Bizjak; A Bondar; A Bozek; M Bračko; J Brodzicka; TE Browder; Y Chao; A Chen; WT Chen; BG Cheon; R Chistov; SK Choi; Y Choi; A Chuvikov; J Dalseno; M Danilov; M Dash; J Dragic; S Eidelman; T Gershon; G Gokhroo; B Golob; A Gorišek; T Hara; K Hayasaka; M Hazumi; L Hinz; T Hokuue; Y Hoshi; S Hou; WS Hou; YB Hsiung; T Iijima; K Ikado; A Imoto; K Inami; A Ishikawa; M Iwasaki; Y Iwasaki; JH Kang; JS Kang; H Kawai; T Kawasaki; HR Khan; HJ Kim; SM Kim; K Kinoshita; P Križan; P Krokovny; R Kulasiri; CC Kuo; A Kuzmin; YJ Kwon; G Leder; SE Lee; T Lesiak; J Li; A Limosani; SW Lin; D Liventsev; G Majumder; F Mandl; A Matyja; Y Mikami; W Mitaroff; H Miyata; GR Moloney; T Nagamine; Y Nagasaka; E Nakano; H Nakazawa; S Nishida; O Nitoh; T Nozaki; S Ogawa; T Ohshima; S Okuno; SL Olsen; Y Onuki; W Ostrowicz; H Ozaki; P Pakhlov; H Park; R Pestotnik

Journal article

Search for the b→dγ process

D Mohapatra, M Nakao, BD Yabsley, K Abe, K Abe, H Aihara, K Arinstein, Y Asano, T Aushev, T Aziz, S Bahinipati, AM Bakich, E Barberio, M Barbero, I Bedny, U Bitenc, I Bizjak, A Bondar, A Bozek, M Bračko Show all

Physical Review D Particles Fields Gravitation and Cosmology | AMER PHYSICAL SOC | Published : 2005

DOI: 10.1103/PhysRevD.72.011101

Abstract

We report the results of a search for the flavor-changing neutral current process b→dγ using a sample of 275×106 B meson pairs accumulated by the Belle detector at KEKB. We find no significant signal for the exclusive decays B-→ρ-γ, B̄0→ρ0γ, or B̄0→ωγ. Assuming an isospin relation between the three modes, we set an upper limit for the combined branching fraction B(B→(ρ,ω)γ), of 1.4×10-6 at the 90% confidence level. This limit can be used to constrain the ratio of CKM matrix elements |Vtd/Vts|. © 2005 The American Physical Society.