A study of e+e- pairs in the mass range 11 to 25 GeV/c2 at the CERN intersecting storage rings
Physics Letters B 147:6 (1984) 472-476
Abstract:
A sample of 58e+e- events with an invariant mass greater than 11 GeV/c2 produced in pp collisions at a centre-of-mass energy of 62.3 GeV is discussed. The cross sections are presented as a function of the mass and transverse momentum. The electron pairs produced with a mean transverse momentum of 2.50 ± 0.25 GeV/c. © 1984.Jets in high transverse energy events at the CERN intersecting storage rings
Nuclear Physics, Section B 244:1 (1984) 1-22
Abstract:
Most events with high neutral transverse energy, ET0, produced in pp colisions at √s = 62.3 GeV, are jet-like. The evidence for this is presented, based on data collected using an electromagnetic calorimeter covering 90% of 2π in azimuth. The spectrum dN/dET0 has been measured over the ET0 range from 10 to 35 GeV. Properties of the observed jets are discussed. © 1984.The total neutral energy spectra in the central region of α-α, d-d and p-p interactions at sNN = 31 GeV per nucleon pair at the CERN ISR
Physics Letters B 141:1-2 (1984) 140-144
Abstract:
The spectra in total neutral energy, ETOT0, have been measured in pp, dd and αα collisions at centre-of-mass energy per nucleon pair, sNN, of 31 GeV. The range in ETOT0 covered was 1 to 19 GeV in pp, 18 to 24 GeV in dd and 1 to 34 GeV in αα interactions. The ratio of the αα to the pp spectra rises monotonically from 7 at ETOT0 = 1.5 GeV to 105 at ETOT 0 = 19 GeV. Since ETOT0 is the sum over many particles in the detector, it is directly sensitive to multiple nucleon-nucleon collisions in the interacting α particles. The αα spectrum in the range 8 < ETOT0 < 17 GeV is consistent with being described by a simple model of 4 simultaneous nucleon-nucleon collisions with a cross section about equal to 10% of the observed αα interaction cross section. The spectrum of ETOT0 above 17 GeV is even flatter than this extreme case where four nucleon pairs are interacting. © 1984.Observation of the anomalous nuclear enhancement in the neutral energy spectrum in the central region of α-α interactions at √s = 124 GeV AT the cern ISR
Nuclear Physics, Section A 418:C (1984) 321-326
OBSERVATION OF THE ANOMALOUS NUCLEAR ENHANCEMENT IN THE NEUTRAL ENERGY-SPECTRUM IN THE CENTRAL REGION OF ALPHA-ALPHA-INTERACTIONS AT SQUARE-ROOT-S= 124 GEV AT THE CERN ISR
NUCLEAR PHYSICS A 418:APR (1984) C321-C326