Luminosity-Independent Measurement of the Proton-Proton Total Cross Section at $\sqrt{s}$ = 8 TeV

TOTEM has measured the proton-proton total cross-section at $\sqrt{s}$ = 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 90% of the nuclear elastic scattering events. Simultaneou...

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Detalles Bibliográficos
Autores principales: Antchev, G, Aspell, P, Atanassov, I, Avati, V, Baechler, J., Berardi, V, Berretti, M, Bossini, E, Bozzo, M, Bottigli, U, Brucken, E, Buzzo, A, Cafagna, F S, Calicchio, M, Catanesi, M G, Covault, C, Csanad, M, Csorgo, 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, Kavspar, J, Kopal, J, Kundrat, V, Kurvinen, K, Lami, S, Latino, G, Lauhakangas, R, Leszko, T, Lippmaa, E, Lokajivcek, M, Lo Vetere, M, Lucas-Rodriguez, F, Macri, M., Maki, T, Mercadante, A, Minafra, N, Minutoli, S, Nemes, F, Niewiadomski, H, Oliveri, E, Oljemark, F, Orava, R, Oriunno, M, Osterberg, K, Palazzi, P, Prochazka, J, Quinto, M, Radermacher, E, Radicioni, E, Ravotti, F, Robutti, E, Ropelewski, L, Ruggiero, G, Saarikko, H, Santroni, A, Scribano, A, Smajek, J, Snoeys, W, Sziklai, J, Taylor, C, Turini, N, Vacek, V, Vitek, M, Welti, J, Whitmore, J, Wyszkowski, P
Lenguaje:eng
Publicado: 2012
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1103/PhysRevLett.111.012001
http://cds.cern.ch/record/1495764
Descripción
Sumario:TOTEM has measured the proton-proton total cross-section at $\sqrt{s}$ = 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 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 $\pm$ 2.9)mb is determined, well in agreement with the extrapolation from lower energies. This method allows also to derive the luminosity-independent elastic and inelastic cross-sections: $\sigma_{el}$ = (27.1 $\pm$ 1.4)mb; $\sigma_{inel}$ = (74.7 $\pm$ 1.7)mb.

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