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

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

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

#Flavour Changing Neutral Current Decay #Flavour Changing Neutral Current #Neutral Current Decay #TOPAZ Detector #Function Of Mass #Current Decay #Neutral Decay Modes #Current Modes #Decay Modes #Experimental Limits

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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/c2 independent of Br(b′→bγ).

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