Charged-Particle Multiplicity Distribution from 200-GeV<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>pp</mml:mi></mml:math>Interactions

Abstract

From 2728 events of 205-GeV $\mathrm{pp}$ interactions found in 15 000 pictures taken with the 30-in. hydrogen bubble chamber at the National Accelerator Laboratory, a total cross section of 39.5\ifmmode\pm\else\textpm\fi{}1.1 mb was measured. The mean charged-particle multiplicity for inelastic $\mathrm{pp}$ collisions was measured to be 7.65\ifmmode\pm\else\textpm\fi{}0.17. The prong distribution from 2 to 22 prongs is broader than a Poisson distribution and has a width parameter $f_{2}^{}{}_{}{}^{\ensuremath{-}}=〈{n}_{\ensuremath{-}}({n}_{\ensuremath{-}}\ensuremath{-}1)〉\ensuremath{-}{〈{n}_{\ensuremath{-}}〉}^{2}=0.95\ifmmode\pm\else\textpm\fi{}0.21$.