Experiment Anti-Helium (Production of Nuclei and Anti-Nuclei. Limits for "exotic" particles of long lifetime)

TL;DR

This paper reports on the production yields of various nuclei and antinuclei in high-energy proton collisions and sets upper limits on the production of hypothetical long-lived exotic particles with specific charges.

Contribution

It provides experimental data on particle yields and establishes new upper limits for the production of long-lived exotic particles with fractional and integer charges.

Findings

Measured yields of pions, kaons, protons, antiprotons, and nuclei.

Set upper limits of 10^-11 for exotic particle production.

Provided data relevant for searches of long-lived exotic particles.

Abstract

Data are recalled on the relative yields of charged pions,charged kaons,protons,antiprotons,tritiun nuclei, anti-tritium, He3 nuclei and anti-He3 antinuclei produced at 0 degrees by 200-240 GeV/c protons on Beryllium and Aluminium targets. A search for the production of long-lived particles with charges 2/3, 1, 4/3, is described; for negative particle production the upper limits obtained at the 95% Confidence Level were at the level of 10-11 with respect to the production of known particles.