Experimental consequences of no-scale supergravity in light of the CDF ee{gamma}{gamma} event
- Bonner Nuclear Lab, Department of Physics, Rice University, 6100 Main Street, Houston, Texas 77005 (United States)
- Center for Theoretical Physics, Department of Physics, Texas AM University, College Station, Texas 77843-4242 (United States)
We explore two possible interpretations for the CDF ee{gamma}{gamma}+E/{sub T} event in the context of a recently proposed no-scale supergravity model with a light gravitino. We delineate the region in parameter space consistent with the kinematics of the event interpreted either as selectron pair production (p{bar p}{r_arrow}{tilde e}{sup +}{tilde e}{sup {minus}}X, {tilde e}={tilde e}{sub R},{tilde e}{sub L}) or as chargino pair production (p{bar p}{r_arrow}{chi}{sub 1}{sup +}{chi}{sub 1}{sup {minus}}X). In the context of this model, the selectron interpretation requires {tilde e}={tilde e}{sub R} and predicts comparable rates for l{sup {plus_minus}}{gamma}{gamma}+E/{sub T}, whereas the chargino interpretation predicts comparable rates for (l{sup {plus_minus}}l{sup {sup {prime}}+}l{sup {sup {prime}}{minus}},l{sup +}l{sup {minus}},l{sup +}l{sup {minus}}jj){gamma}{gamma}+E/{sub T}. We also consider the constraints from CERN LEP 1.5 and the expectations for LEP 2. We point out that one of the acoplanar photon pairs observed by the OPAL Collaboration at LEP 1.5 may be attributable to supersymmetry in the present model via e{sup +}e{sup {minus}}{r_arrow}{chi}{sub 1}{sup 0}{chi}{sub 1}{sup 0}{r_arrow}{gamma}{gamma}+E/{sub T}. We also show how similar future events at LEP 2 may be used to deduce the neutralino mass. {copyright} {ital 1997} {ital The American Physical Society}
- Research Organization:
- Texas A&M Research Foundation
- DOE Contract Number:
- FG05-91ER40633; FG05-92ER40717
- OSTI ID:
- 535732
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 7 Vol. 55; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
Similar Records
Search for Chargino-Neutralino Associated Production at the Fermilab Tevatron Collider
Search for chargino-neutralino production in {ital p{bar p}} collisons at {radical}{ital s}=1.8 TeV