# Measurement of the Inelastic Proton-Proton Cross Section at $\sqrt{s} = 13$ TeV with the ATLAS Detector at the LHC

Abstract : This Letter presents a measurement of the inelastic proton-proton cross section using 60 $\mu$b$^{-1}$ of $pp$ collisions at a center-of-mass energy $\sqrt{s}$ of $13$ TeV with the ATLAS detector at the LHC. Inelastic interactions are selected using highly efficient plastic scintillators in the forward region of the detector. A cross section of $68.2\pm 1.5$ mb is measured in the fiducial region $\xi=M_X^2/s>10^{-6}$, where $M_X$ is the largest invariant mass of the two hadronic systems separated by the largest rapidity gap in the event. For diffractive events this corresponds to cases where at least one proton dissociates to a system of mass larger than 13 GeV. The measurement agrees with a range of theoretical predictions. When extrapolated to the full phase space, the result is consistent with an inelastic cross section increasing with center-of-mass energy, as observed at lower energies.
Type de document :
Article dans une revue
Physical Review Letters, American Physical Society, 2016, 117, pp.182002. 〈10.1103/PhysRevLett.117.182002〉

http://hal.in2p3.fr/in2p3-01329367
Contributeur : Claudine Bombar <>
Soumis le : jeudi 9 juin 2016 - 10:25:33
Dernière modification le : lundi 9 avril 2018 - 12:22:08

### Citation

M. Aaboud, Z. Barnovska, N. Berger, M. Delmastro, L. Di Ciaccio, et al.. Measurement of the Inelastic Proton-Proton Cross Section at $\sqrt{s} = 13$ TeV with the ATLAS Detector at the LHC. Physical Review Letters, American Physical Society, 2016, 117, pp.182002. 〈10.1103/PhysRevLett.117.182002〉. 〈in2p3-01329367〉

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