LIMITS ON CHARGED PARTICLES IN HADRONIC REACTIONS

Long-Lived Heavy Particle Invariant Cross Section

INSPIRE   PDGID:
S015ICH
VALUE (cm${}^{2}$/GeV${}^{2}/{{\mathit N}}$) CL% DOCUMENT ID TECN CHG  COMMENT
• • We do not use the following data for averages, fits, limits, etc. • •
$<5 - 700{\times }\text{E-35}$ 90 1
BERNSTEIN
1988
CNTR
$<5 - 700{\times }\text{E-37}$ 90 1
BERNSTEIN
1988
CNTR
$<2.5 \times 10^{-36}$ 90 2
THRON
1985
CNTR - $\mathit Q$= 1, $\mathit m=4-$12 GeV
$<1. \times 10^{-35}$ 90 2
THRON
1985
CNTR + $\mathit Q$= 1, $\mathit m=4-$12 GeV
$<6. \times 10^{-33}$ 90 3
ARMITAGE
1979
SPEC $\mathit m=1.87$ GeV
$<1.5 \times 10^{-33}$ 90 3
ARMITAGE
1979
SPEC $\mathit m=1.5-3.0$ GeV
4
BOZZOLI
1979
CNTR $\pm{}$ $\mathit Q$ = (2/3, 1, 4/3, 2)
$<1.1 \times 10^{-37}$ 90 5
CUTTS
1978
CNTR $\mathit m=4-$10 GeV
$<3.0 \times 10^{-37}$ 90 6
VIDAL
1978
CNTR $\mathit m=4.5-$6 GeV
1  BERNSTEIN 1988 limits apply at $\mathit x$ = $0.2$ and $\mathit p_{\mathit T}$ = 0. Mass and lifetime dependence of limits are shown in the regions: $\mathit m$ = $1.5-7.5$ GeV and $\tau $ = $10^{-8}-2 \times 10^{-6}~$s. First number is for hadrons; second is for weakly interacting particles.
2  THRON 1985 is FNAL 400 GeV proton experiment. Mass determined from measured velocity and momentum. Limits are for $\tau $ $>3 \times 10^{-9}$ s.
3  ARMITAGE 1979 is CERN-ISR experiment at $\mathit E_{{\mathrm {cm}}}$ = 53 GeV. Value is for $\mathit x$ = 0.1 and $p_T$ = 0.15. Observed particles at $\mathit m$ = 1.87 GeV are found all consistent with being antideuterons.
4  BOZZOLI 1979 is CERN-SPS 200 GeV ${{\mathit p}}{{\mathit N}}$ experiment. Looks for particle with $\tau $ larger than $10^{-8}$ s. See their figure 11$-$18 for production cross-section upper limits vs mass.
5  CUTTS 1978 is ${{\mathit p}}{}^{}\mathrm {Be}$ experiment at FNAL sensitive to particles of $\tau $ $>5 \times 10^{-8}$ s. Value is for $-0.3$ $<\mathit x$ $<$0 and $p_T$ = 0.175.
6  VIDAL 1978 is FNAL 400 GeV proton experiment. Value is for $\mathit x$ = 0 and $p_T$ = 0. Puts lifetime limit of $<5 \times 10^{-8}~$s on particle in this mass range.
References