Luminosity-Independent Measurement of the Proton-Proton Total Cross Section at root s=8 TeV

Antchev, G.; Aspell, P.; Atanassov, I.; Avati, V.; Baechler, J.; Berardi, V.; Berretti, Mirko; Bossini, Edoardo; Bottigli, Ubaldo; Bozzo, M.; Brücken, E.; Buzzo, A.; Cafagna, F. S.; Calicchio, M.; Catanesi, M. G.; Covault, C.; Csanád, M.; Csörg??, T.; Deile, M.; Doubek, M.; Eggert, K.; Eremin, V.; Ferretti, R.; Ferro, F.; Fiergolski, A.; Garcia, F.; Giani, S.; Greco, V.; Grzanka, L.; Heino, J.; Hilden, T.; Intonti, R. A.; Ka??par, J.; Kopal, J.; Kundrát, V.; Kurvinen, K.; Lami, S.; Latino, Giuseppe; Lauhakangas, R.; Leszko, T.; Lippmaa, E.; Lokají??ek, M.; Lo Vetere, M.; Lucas Rodríguez, F.; Macrí, M.; Mäki, T.; Mercadante, A.; Minafra, N.; Minutoli, S.; Nemes, F.; Niewiadomski, H.; Oliveri, E.; Oljemark, F.; Orava, R.; Oriunno, M.; Österberg, K.; Palazzi, P.; Procházka, J.; Quinto, M.; Radermacher, E.; Radicioni, E.; Ravotti, F.; Robutti, E.; Ropelewski, L.; Ruggiero, G.; Saarikko, H.; Santroni, A.; Scribano, Angelo; Smajek, J.; Snoeys, W.; Sziklai, J.; Taylor, C.; Turini, Nicola; Vacek, V.; Vítek, M.; Welti, J.; Whitmore, J.; Wyszkowski, P.

doi:10.1103/PhysRevLett.111.012001

The TOTEM collaboration has measured the proton-proton total cross section at root s = 8 TeV using a luminosity-independent method. In LHC fills with dedicated beam optics, the Roman pots have been inserted very close to the beam allowing the detection of similar to 90% of the nuclear elastic scattering events. Simultaneously the inelastic scattering rate has been measured by the T1 and T2 telescopes. By applying the optical theorem, the total proton-proton cross section of (101.7 +/- 2.9) mb has been determined, well in agreement with the extrapolation from lower energies. This method also allows one to derive the luminosity-independent elastic and inelastic cross sections: sigma(el) = (27.1 +/- 1.4) mb; sigma(inel) = (74.7 +/- 1.7) mb.

G., A., P., A., I., A., V., A., J., B., V., B., et al. (2013). Luminosity-Independent Measurement of the Proton-Proton Total Cross Section at root s=8 TeV. PHYSICAL REVIEW LETTERS, 111(1) [10.1103/PhysRevLett.111.012001].