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

TLDR
TOTEM has measured the differential cross-section for elastic proton-proton scattering at the LHC energy of analysing data from a short run with dedicated large-β* optics as discussed by the authors.
Abstract
TOTEM has measured the differential cross-section for elastic proton-proton scattering at the LHC energy of analysing data from a short run with dedicated large-β* optics. A single exponential fit with a slope B=(20.1±0.2stat±0.3syst) GeV−2 describes the range of the four-momentum transfer squared |t| from 0.02 to 0.33 GeV2. After the extrapolation to |t|=0, a total elastic scattering cross-section of (24.8±0.2stat±1.2syst) mb was obtained. Applying the optical theorem and using the luminosity measurement from CMS, a total proton-proton cross-section of (98.3±0.2stat±2.8syst) 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 was inferred.

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Citations
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Journal ArticleDOI

Probing the Odderon in coherent hadron–hadron interactions at CERN LHC

TL;DR: In this article, the diffractive η c photoproduction in coherent interactions was used as a new alternative to probe the Odderon in pp and PbPb collisions at CERN LHC.
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Charged multiplicities in pp and AA collisions at LHC

TL;DR: In this paper, the mid-rapidity charged particle multiplicities in pp and AA collisions at LHC energies are described in the framework of a generalized eikonal model with shadowing corrections incorporated in AA.
Journal ArticleDOI

Torus or black disk

TL;DR: In this article, it was shown that the interaction region of colliding protons appears almost totally absorbing (black) at impact parameters to 0.4-0.5 fm and LHC energy of 7 TeV.
Journal ArticleDOI

Structures in the diffraction cone: The “break” and “dip” in high-energy proton–proton scattering

TL;DR: In this article, the correlation between two prominent structures seen upon the otherwise exponential diffraction cone, namely a break staying fixed around t ≈−0.1 ǫ and a dip moving with energy logarithmically inwards, was investigated.
Journal ArticleDOI

Leading components in forward elastic hadron scattering: Derivative dispersion relations and asymptotic uniqueness

TL;DR: In this article, a detailed discussion on the similarities and mainly the differences between the Derivative Dispersion Relation (DDR) and Asymptotic Uniqueness (AU) approaches and results are presented, with focus on the Lγ and L2 leading terms.
References
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TL;DR: Beringer et al. as mentioned in this paper presented a review of particle physics using data from previous editions, plus 2658 new measurements from 644 papers, and summarized searches for hypothetical particles such as Higgs bosons, heavy neutrinos, and supersymmetric particles.
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Koji Nakamura, +183 more
- 07 Sep 2010 - 
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Journal ArticleDOI

The TOTEM Experiment at the CERN Large Hadron Collider

G. Anelli, +115 more
TL;DR: The TOTEM Experiment as discussed by the authors measured the total pp cross-section with the luminosity-independent method and studied elastic and diffractive scattering at the LHC using two tracking telescopes, T1 and T2.
Journal ArticleDOI

Benchmarks for the forward observables at RHIC, the Tevatron-run II, and the LHC.

TL;DR: These predictions are based on an extensive study of possible analytic parametrizations invoking the largest hadronic dataset available at t=0.1 TeV, and on total cross sections for gammap-->hadrons at cosmic-ray energies and forgammagamma -->hadrons up to sqrt[s]=1 Tev.
Journal ArticleDOI

The energy dependence of the proton-proton total cross-section for centre-of-mass energies between 23 and 53 GeV

TL;DR: The absolute scale of the cross-section was established by determination of the effective density of the colliding beans in their overlap region as mentioned in this paper, which was deduced by extrapolation of the elastic differential crosssection to the forward direction and by application of the optical theorem.
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