Inelasticity of hadron-lead collisions, estimated by thick lead emulsion chambers at the Pamirs

Inelasticity for hadron-carbon nucleus collisions from emulsion chamber

The inelasticity of hadron-carbon collisions for energies exceeding 100 TeV is estimated from the carbonemulsion chamber data at Pamirs to be 〈KC〉 = 0.65± 0.08. When combined with data on hadron-lead collisions taken at the same energy range it results in the K ∼ A mass number dependence of inelasticity. The evaluated partial inelasticity for secondary (ν > 1) interactions, Kν>1 ≃ 0.2, suggests...

Alignment in Gamma-Hadron Families Detected by Deep Lead X-ray Emulsion Chambers

Alignment of main fluxes of energy in a target plane is found in families of cosmic ray particles detected in deep lead X-ray emulsion chambers. The fraction of aligned events becomes unexpectedly large for superfamilies with the total energy of gamma-quanta exceeding 10 TeV. This can be considered as an evidence of existence of coplanar scattering of secondary particles in interactions of prim...

lead-lead collisions with the ATLAS detector

Differential measurements of charged particle azimuthal anisotropy are presented for lead-lead collisions at √ sNN = 2.76 TeV with the ATLAS detector at the LHC, based on an integrated luminosity of approximately 8 μb−1. This anisotropy is characterized via a Fourier expansion of the distribution of charged particles in azimuthal angle relative to the reaction plane, with the coefficients vn de...

HYPERON PRODUCTION IN PROTON-LEAD AND LEAD-LEAD COLLISIONS AT 158 GeV/c PER NUCLEON

for the WA97 collaboration) The WA97 experiment studies the production of strange and multistrange particles in Pb{Pb and p{Pb collisions at 158 GeV/c per nucleon. Recent results on and production ratios and transverse mass distributions are reported and compared with those obtained by WA85 and WA94 experiments. A signiicant enhancement of the // ratio has been observed when going from nucleon-...

Study of Electron Pair and Photon Production in Lead-lead Collisions at the Cern Sps