Measurement of the inelastic pPb cross section at 5.02 TeV

Collaboration
2013
22 pages
Report number:
  • CMS-PAS-FSQ-13-006
Experiments:

Citations per year

2014201520162017160
Abstract:
A measurement of the inelastic proton-lead (pPb) cross section at a nucleon-nucleon centre-of-mass energy of 5.025.02\,TeV is presented using the CMS detector at the LHC. Inelastic collisions are tagged using the forward calorimeters at pseudorapidities 3<η<53<|\eta|<5. Two different event selections are used: (i) a coincidence of both sides of the detector, and (ii) a single-sided event selection. These two selections have different sensitivity to contributions from photon induced (γ\gammap) collisions and hadronic diffractive interactions. The value of the hadronic inelastic cross section is measured within the CMS acceptance and extrapolated to its total value. The photon-induced contribution is subtracted. The final result is σinel=2.06±0.08\sigma_{\text{inel}}=2.06\pm0.08\,b. The uncertainty is dominated by the luminosity determination. This measurement of the inelastic cross section is consistent with the expectation from the Glauber approach.
Note:
  • Preliminary results
  • Data
  • cross section: measured
  • CMS
  • CERN LHC Coll
  • diffraction
  • rapidity
  • model: Glauber
  • experimental results
  • angular correlation
  • p nucleus: inelastic scattering