A search for A b′ quark with flavor changing neutral current decay modes at TRISTAN

I Adachi,K Shimozawa,T Ishii,H Ozaki,A Miyamoto,A Sugiyama,A Shirahashi,R Kajikawa,Y Watanabe,S Noguchi,S Yamamoto,O Nitoh,K Iwashiro,H Kichimi,B Howell,N Sasayama,J Yoshizawa,T Kamae,S Uno,T Kishida,N Kusuki,S Higashi,H Hayashii,T Okusawa,F Ochiai,T Tsukamoto,S Yamashita,A Shimonaka,H Takamure,Y Yoake,Y Kato,Y Teramoto,Y Kayahara,R Itoh,M Yamauchi,T Takahashi ,Shingo Suzuki ,J Fujimoto ,Keisuke Fujii ,K Ukai ,I Levine ,T Fujii ,A Yamamoto ,R Enomoto ,K Fujiwara ,T Nagira ,Hirofumi Fujii ,H Aihara ,N Iida ,A Maruyama ,R Sugahara ,A Imanishi ,Seiya Kato ,T Tauchi ,K Muramatsu ,K Takahashi ,Hiroshi Okuno ,M Kobayashi ,D Koltick ,Hirokazu Ikeda ,Katsuyoshi Matsushita ,S Kawabata ,H Iwasaki ,S Onodera ,K Nagai ,N Fujiwara ,M Doser ,K Maruyama

doi:10.1016/0370-2693(90)92028-h

A search for A b′ quark with flavor changing neutral current decay modes at TRISTAN

I Adachi, K Shimozawa + Show 66 more

https://doi.org/10.1016/0370-2693(90)92028-h

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Journal: Physics Letters B	Publication Date: Jan 1, 1990
Citations: 5

Affiliation: Nagoya University, The University of Tokyo, High Energy Accelerator Research Organization, Tokyo Institute of Technology, Nara Women's University, Tokyo University of Agriculture and Technology, Tezukayama University, Osaka City University, Purdue University West Lafayette, Kobe University

#Flavour Changing Neutral Current Decay #Flavour Changing Neutral Current + Show 8 more

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Abstract

A search for the b′ quark via flavour changing neutral current (FCNC) decay modes is described. The search was carried out by looking for isolated high energy photon(s) or back to back jet pairs within 4-jet topologies using the data taken by the TOPAZ detector at TRISTAN in the energy range s =50.0−60.8 GeV . As the FCNC decay branching ratio of the b′ is unknown, the experimental limits are given as a function of mass and branching ratio. Assuming the branching ration of the FCNC mode is 100%, a mass limit for b′ is set ⩾28.3 GeV/ c 2 independent of Br(b′→b γ).

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