Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Search for stopped gluinos from pp collisions at √s = 1.96-TeV}.
AU - Abazov, V. M.
AU - Bertram, Iain
AU - Borissov, Guennadi
AU - Fox, Harald
AU - Ratoff, Peter
AU - Sopczak, Andre
PY - 2007/9/24
Y1 - 2007/9/24
N2 - 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 (), 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-1 of p collisions at =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 (). Limits are placed on the (gluino cross section)×(probability to stop)×[BR(g)] as a function of the gluino and masses, for gluino lifetimes from 30 µs–100 h.
AB - 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 (), 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-1 of p collisions at =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 (). Limits are placed on the (gluino cross section)×(probability to stop)×[BR(g)] as a function of the gluino and masses, for gluino lifetimes from 30 µs–100 h.
U2 - 10.1103/PhysRevLett.99.131801
DO - 10.1103/PhysRevLett.99.131801
M3 - Journal article
VL - 99
SP - 131801
JO - Physical review letters
JF - Physical review letters
SN - 1079-7114
ER -