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Can the Aleph four-jet excess be explained in a supersymmetric model with R-parity violation? |
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| Authors: | Dilip Kumar Ghosh Rohini M Godbole Sreerup Raychaudhuri |
| Institution: | 1. Department of Physics, University of Bombay, Vidyanagari, Santa Cruz (East), Mumbai, 400 098, India 2. Centre for Theoretical Studies, Indian Institute of Science, Bangalore, 560 012, India 3. Theoretical Physics Group, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai, 400 005, India |
| Abstract: | We investigate the possibility that the excess of four-jet events in e + e ? collisions at LEP-1.5 which has been reported by the ALEPH Collaboration could be due to the production of charginos or neutralinos, followed by their decay into quark jets through baryon number-violating (λ″) couplings. An estimate at the parton level shows, however, that these events cannot be due to neutralinos because of the low cross-section, and is unlikely to be due to the production of chargino pairs because of the largely different event shapes. |
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