F. Abe et al., SEARCH FOR QUARK COMPOSITENESS, AXIGLUONS, AND HEAVY-PARTICLES USING THE DIJET INVARIANT MASS-SPECTRUM OBSERVED IN P(P)OVER-BAR COLLISIONS, Physical review letters, 71(16), 1993, pp. 2542-2546
The dijet invariant mass distribution has been measured in the region
between 140 and 1000 GeV/c2, in 1.8 TeV ppBAR collisions. Data collect
ed with the Collider Detector at Fermilab show agreement with QCD calc
ulations. A limit on quark compositeness of LAMBDA(c) > 1.3 TeV is obt
ained. Axigluons with masses between 240 and 640 GeV/c2 are excluded a
t 95% C.L. if we assume ten open decay channels. Model-independent lim
its on the production of heavy particles decaying into two jets are al
so presented.