Supersymmetric Photonic Signals at the CERN {ital e}{sup {bold +}}{ital e}{sup {bold {minus}}} Collider LEP in Light Gravitino Models
- Department of Physics, Bonner Nuclear Lab, Rice University, 6100 Main Street, Houston, Texas 77005 (United States)
We explore and contrast the single-photon and diphoton signals expected at the CERN {ital e}{sup +}{ital e}{sup {minus}} collider LEP2 that arise from neutralino-gravitino ({ital e}{sup +}{ital e}{sup {minus}}{r_arrow}{chi}{ital {tilde G}}{r_arrow}{gamma}+{ital E}{sub miss}) and neutralino- neutralino ({ital e}{sup +}{ital e}{sup {minus}}{r_arrow}{chi}{chi}{r_arrow}{gamma}{gamma}+{ital E}{sub miss}) production in supersymmetric models with a light gravitino. LEP1 limits imply that one may observe either one, but not both, of these signals at LEP2, depending on the values of the neutralino and gravitino masses: single photons for {ital m}{sub {chi}}{approx_gt}{ital M}{sub {ital Z}} and {ital m}{sub {tilde {ital G}}}{approx_lt}3{times}10{sup {minus}5} eV; diphotons for {ital m}{sub {chi}}{approx_lt}{ital M}{sub {ital Z}} and all allowed values of {ital m}{sub {tilde {ital G}}}. {copyright} {ital 1996 The American Physical Society.}
- Research Organization:
- Texas A&M Research Foundation
- DOE Contract Number:
- FG05-91ER40633; FG05-92ER40717
- OSTI ID:
- 404761
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 26 Vol. 77; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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