# Long-Lived Heavy Particle Invariant Cross Section INSPIRE search

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
 1988
CNTR
$<5 - 700{\times }\text{E-37}$ 90 1
 1988
CNTR
$<2.5 \times 10^{-36}$ 90 2
 1985
CNTR - $\mathit Q$= 1, $\mathit m=4-$12 GeV
$<1. \times 10^{-35}$ 90 2
 1985
CNTR + $\mathit Q$= 1, $\mathit m=4-$12 GeV
$<6. \times 10^{-33}$ 90 3
 1979
SPEC $\mathit m=1.87$ GeV
$<1.5 \times 10^{-33}$ 90 3
 1979
SPEC $\mathit m=1.5-3.0$ GeV
4
 1979
CNTR +- $\mathit Q$ = (2/3, 1, 4/3, 2)
$<1.1 \times 10^{-37}$ 90 5
 1978
CNTR $\mathit m=4-$10 GeV
$<3.0 \times 10^{-37}$ 90 6
 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:
 BERNSTEIN 1988
PR D37 3103 Search for New, Long-Lived, Neutral Particles
 THRON 1985
PR D31 451 Search for Heavy Charged Particles and Light Nuclei and Antinuclei Produced by 400 GeV Protons
 ARMITAGE 1979
NP B150 87 Search for the New Longlived Particles with Masses in the Range 1.4 GeV to 3.0 GeV at the CERN ISR
 BOZZOLI 1979
NP B159 363 Search for Longlived Particles in 200 ${\mathrm {GeV/}}\mathit c$ Proton Nucleon Collisions
 CUTTS 1978
PRL 41 363 Search for Longlived Heavy Particles
 VIDAL 1978
PL 77B 344 A Search for New Massive Particles