Measurement of the total cross section from elastic scattering in pp collisions at root s=7 TeV with the ATLAS detector


Aad G., Abbott B., Abdallah J., Khalek S. A. , Abdinov O., Aben R., et al.

NUCLEAR PHYSICS B, cilt.889, ss.486-548, 2014 (SCI İndekslerine Giren Dergi)

Özet

A measurement of the total pp cross section at the LHC at root s = 7 TeV is presented. In a special run with high-beta* beam optics, an integrated luminosity of 80 mu b(-1) was accumulated in order to measure the differential elastic cross section as a function of the Mandelstam momentum transfer variable t. The measurement is performed with the ALFA sub-detector of ATLAS. Using a fit to the differential elastic cross section in the vertical bar t vertical bar range from 0.01 GeV2 to 0.1 GeV2 to extrapolate to vertical bar t vertical bar --> 0, the total cross section, sigma(tot)(pp --> X), is measured via the optical theorem to be: