LIMITS ON CHARGED PARTICLES IN HADRONIC REACTIONS

Long-Lived Heavy Particle Production (${\boldsymbol \sigma (}$Heavy Particle${)}$ $/$ ${\boldsymbol \sigma (}{{\boldsymbol \pi}}{)}$) INSPIRE search

VALUE EVTS DOCUMENT ID TECN CHG  COMMENT
• • • We do not use the following data for averages, fits, limits, etc. • • •
$<10^{-8}$ 1
NAKAMURA
1989
SPEC $\pm{}$ $\mathit Q$= ($−5/3,\pm{}$2)
0 2
BUSSIERE
1980
CNTR $\pm{}$ $\mathit Q$= (2/3,1,4/3,2)
1  NAKAMURA 1989 is KEK experiment with 12 GeV protons on Pt target. The limit applies for mass ${ {}\lesssim{} }$ $1.6$ GeV and lifetime ${ {}\gtrsim{} }$ $10^{-7}~$s.
2  BUSSIERE 1980 is CERN-SPS experiment with 200$-$240 GeV protons on ${}^{}\mathrm {Be}$ and ${}^{}\mathrm {Al}$ target. See their figures 6 and 7 for cross-section ratio vs mass.
  References:
NAKAMURA 1989
PR D39 1261 Search for Long Lived Exotic Particles in 12 GeV Proton-Nucleus Interactions
BUSSIERE 1980
NP B174 1 Particle Production and Search for Longlived Particles in 200 to 240 ${\mathrm {GeV/}}\mathit c$ Proton Nucleon Collisions