Measurement of thep−pTotal Cross Section at 200 and 300 GeV/c

Abstract

We have measured total cross sections for $p-p$ scattering with the results ${\sigma }_T=40.42\mathrm{}\pm 0.27$ mb at 200 GeV/c and 40.40 ± 0.28 mb at 300 GeV/c. Our 300-GeV/c result is significantly higher than published data from the CERN intersecting storage rings. Our data, taken together with the Serpukhov data, indicate that the cross section rises ≅ 2 mb between 60 and 250 GeV. The variation of the cross section with energy may be more complicated than the $a+b\ln {}_{}{}^{\alpha }{}_{}{}^{}s$ behavior commonly assumed for $E_{\mathrm{lab}}\gtrsim 50$ GeV.