Measurement of proton-proton inelastic scattering cross-section at \chem{\sqrt {s} = 7\,{\mathrm {TeV}}}

The TOTEM experiment at the LHC has measured the inelastic proton-proton cross-section at in a ?*?=?90?m run with low inelastic pile-up. The measurement was based on events with at least one charged particle in the T2 telescope acceptance of 5.3?pseudorapidity. Combined with data from the T1 telescope, covering 3.1?cross-section for inelastic events with at least one |?|???6.5 final-state particle was determined to be (70.5???2.9)?mb. This cross-section includes all central diffractive events of which maximally 0.25?mb is estimated to escape the detection of the telescopes. Based on models for low mass diffraction, the total inelastic cross-section was deduced to be (73.7???3.4)?mb. An upper limit of 6.31?mb at 95% confidence level on the cross-section for events with diffractive masses below 3.4?GeV was obtained from the difference between the overall inelastic cross-section obtained by TOTEM using elastic scattering and the cross-section for inelastic events with at least one |?|???6.5 final-state particle.