CERN Accelerating science

Article
Title	A search for fractionally charged particles at the CERN intersecting storage rings
Author(s)	Fabjan, C W (CERN) ; Caldwell, D O (CERN) ; Gruhn, Charles R (CERN) ; Peak, L S (CERN) ; Rochester, L S ; Sauli, Fabio (CERN) ; Stierlin, U ; Tirler, R ; Winstein, B ; Zahniser, D
Publication	1975
In:	Nucl. Phys. B 101 (1975) 349-83
DOI	10.1016/0550-3213(75)90602-1
Subject category	Particle Physics - Phenomenology
Abstract	Final results of a search for fractionally charged particles at the CERN Intersecting Storage Rings are reported. Several independent scintillation counter, multiwire proportional chamber telescopes simultaneously sampled c.m. production angles from 0 degrees to 90 degrees . The experiment was sensitive to particles of electric charge in the range 0.1e< mod Q mod <0.8e, with velocities greater than 0.25c and with masses up to, in principle, 47 GeV/c/sup 2/. No such particles were observed among the products of 1.2*10/sup 10/ proton- proton interactions at s=2830 GeV/sup 2/. The cross section limit for the production of quark-antiquark pairs of charge mod Q mod =/sup 1 ///sub 3/e or /sup 2///sub 3/e in the reaction pp to ppqq, at s=2830 GeV/sup 2/, is sigma <or approximately=8*10/sup -35/ cm/sup 2/ for quark masses up to approximately 20 GeV/c/sup 2/. (30 refs).

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