Search for Stopped Gluinos from pp Collisions at {radical}(s)=1.96 TeV
- Joint Institute for Nuclear Research, Dubna (Russian Federation)
- University of Oklahoma, Norman, Oklahoma 73019 (United States)
- Michigan State University, East Lansing, Michigan 48824 (United States)
Long-lived, heavy particles are predicted in a number of models beyond the standard model of particle physics. We present the first direct search for such particles' decays, occurring up to 100 h after their production and not synchronized with an accelerator bunch crossing. We apply the analysis to the gluino (g-tilde), predicted in split supersymmetry, which after hadronization can become charged and lose enough momentum through ionization to come to rest in dense particle detectors. Approximately 410 pb{sup -1} of pp collisions at {radical}(s)=1.96 TeV collected with the D0 detector during Run II of the Fermilab Tevatron collider are analyzed in search of such 'stopped gluinos' decaying into a gluon and a neutralino ({chi}-tilde{sub 1}{sup 0}). Limits are placed on the (gluino cross section)x(probability to stop)x[BR(g-tilde{yields}g{chi}-tilde{sub 1}{sup 0})] as a function of the gluino and {chi}-tilde{sub 1}{sup 0} masses, for gluino lifetimes from 30 {mu}s-100 h.
- OSTI ID:
- 21024196
- Journal Information:
- Physical Review Letters, Vol. 99, Issue 13; Other Information: DOI: 10.1103/PhysRevLett.99.131801; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA). D0 Collaboration; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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