Decay search for the supersymmetric R(0) (gluon gluino) hadron via the channel R(0) going to positive pion negative pion photino

• Main Author: Hern, Kevin Michael
• Format: Others
• Language: English
• Published: W&M ScholarWorks 1999
• Subjects: Physics
• Online Access: https://scholarworks.wm.edu/etd/1539623959; https://scholarworks.wm.edu/cgi/viewcontent.cgi?article=3572&context=etd

There has been recent theoretical interest in supersymmetry breaking scenarios in which the gauginos are light compared to the squarks. One prediction of these light gluino models is the existence of the R 0 hadron (gg?£). Brookhaven National Laboratory AGS Experiment 935 (E935) searched for light gluinos through the appearance of pi+pi- pairs with invariant mass Mpipi > 545 MeV/c2 in a high flux neutral beam. The search has yielded one candidate event. This event is consistent with the anticipated background of 1.4 events due to interactions of neutrons in the beam with the residual gas in the evacuated decay region. Depending on the mass of the photino, we set an upper limit on the flux ratio of production of the hypothetical R0 relative to that of the K0L for R0 particles in the mass and lifetime ranges of 0.91 GeV/c2 < MR0 < 2.0 GeV/c2 and 4 x 10-10 s < tau < 1 x 10-3 s respectively.