Speaker
Dr
Mario Deile
(CERN)
Summary
TOTEM has measured elastic pp scattering at sqrt(s) = 7 TeV to |t| as low as 5 x 10^-3 GeV^2. The data were taken in several runs with special beam optics (beta* = 90 m) and Roman Pot detectors placed as close as 4.8 sigma from the outgoing beams. In addition, the inelastic rates were recorded with the telescopes T1 and T2 for 5.3 < |eta| < 6.4. Thus the total pp cross-section could be measured with 3 different techniques: (1) the luminosity-independent method via the optical theorem (OT); (2) also via the OT but using only dsigma(el) / dt (t=0) with the lumi from CMS; (3) as direct sum of elastic and inelastic cross-sections with the lumi from CMS. All results agree within their errors.
Primary author
Dr
Mario Deile
(CERN)