TOTEM has measured the differential cross-section for elastic proton-proton scattering at the LHC energy of root s = 7 TeV analysing data from a short run with dedicated large-beta* optics. A single exponential fit with a slope B = (20.1 +/- 0.2(stat) +/- 0.3(syst)) GeV-2 describes the range of the four-momentum transfer squared vertical bar t vertical bar from 0.02 to 0.33 GeV2. After the extrapolation to vertical bar t vertical bar = 0, a total elastic scattering cross-section of (24.8 +/- 0.2(stat) +/- 1.2(syst)) mb was obtained. Applying the optical theorem and using the luminosity measurement from CMS, a total proton-proton cross-section of (98.3 +/- 0.2(stat) +/- 2.8(syst)) mb was deduced which is in good agreement with the expectation from the overall fit of previously measured data over a large range of center-of-mass energies. From the total and elastic pp cross-section measurements, an inelastic pp cross-section of (73.5 +/- 0.6(stat) (+1.8)(-1.3) (syst)) mb was inferred.

G., A., P., A., I., A., V., A., J., B., V., B., et al. (2011). First measurement of the total proton-proton cross-section at the LHC energy of sqrt(s) =7 TeV. EUROPHYSICS LETTERS, 96(2) [10.1209/0295-5075/96/21002].

First measurement of the total proton-proton cross-section at the LHC energy of sqrt(s) =7 TeV

BERRETTI, MIRKO;BOSSINI, EDOARDO;BROGI, PAOLO;OLIVERI, ERALDO;SCRIBANO, ANGELO;TURINI, NICOLA;
2011-01-01

Abstract

TOTEM has measured the differential cross-section for elastic proton-proton scattering at the LHC energy of root s = 7 TeV analysing data from a short run with dedicated large-beta* optics. A single exponential fit with a slope B = (20.1 +/- 0.2(stat) +/- 0.3(syst)) GeV-2 describes the range of the four-momentum transfer squared vertical bar t vertical bar from 0.02 to 0.33 GeV2. After the extrapolation to vertical bar t vertical bar = 0, a total elastic scattering cross-section of (24.8 +/- 0.2(stat) +/- 1.2(syst)) mb was obtained. Applying the optical theorem and using the luminosity measurement from CMS, a total proton-proton cross-section of (98.3 +/- 0.2(stat) +/- 2.8(syst)) mb was deduced which is in good agreement with the expectation from the overall fit of previously measured data over a large range of center-of-mass energies. From the total and elastic pp cross-section measurements, an inelastic pp cross-section of (73.5 +/- 0.6(stat) (+1.8)(-1.3) (syst)) mb was inferred.
G., A., P., A., I., A., V., A., J., B., V., B., et al. (2011). First measurement of the total proton-proton cross-section at the LHC energy of sqrt(s) =7 TeV. EUROPHYSICS LETTERS, 96(2) [10.1209/0295-5075/96/21002].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/22188
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