Abstract
The TOTEM experiment has performed several measurements related to its physics program in dedicated (high β*, low ℒ) LHC fills at √s = 7 TeV. Under various beam and background conditions, the differential elastic (as a function of |t|), elastic, inelastic and total pp cross-sections have been measured. A measurement of the forward charged particle η density has also been performed. A summary of these measurements is here reported, as well as the first results from runs at the LHC energy of √s = 8 TeV.
Highlights
Given the lack of a complete description, based on a the very forward region with a good acceptance for parsolid theoretical ground in the framework of the QCD, for ticles produced at very small angles with respect to the the “soft” hadron interactions, many details of di ffractive beam
After comparing several Monte Carlo (MC) models, the correction for the missing low mass single diffractive cross-section has been obtained based on the QGSJET-II-03 generator, which can well describe the measurements of low mass diffraction at lower energies
The cross-sections measured with this “ L-independent” method, reported in table 1, are well in agreement with the previous TOTEM measurements, which confirms the understanding of the systematic uncertainties and of the corrections applied in the different analysis strategies
Summary
Dorapidity density (dNch/dη) and multiplicity distribution (Nch) in a previously unexplored forward η region. Given the lack of a complete description, based on a the very forward region with a good acceptance for parsolid theoretical ground in the framework of the QCD, for ticles produced at very small angles with respect to the the “soft” hadron interactions, many details of di ffractive beam. This involves the detection of elastically scattered (due to color singlet exchange) and non-diffractive (due to and diffractive protons at a location very close to the beam, color exchange) processes are still poorly understood. The data taken during 2010 and 2011 in special runs with various LHC configurations allowed the first TOTEM measurements, as reported in the following
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