Measurement of inelastic, single- and double-diffraction cross sections in proton–proton collisions at the LHC with ALICE

Alme, J.; Erdal, H. A.; Helstrup, H.; Hetland, Kristin Fanebust; Kileng, B.; Altinpinar, S.; Djuvsland, Ø.; Fehlker, D.; Haaland, Ø.; Huang, M.; Langoy, R.; Lien, J.; Liu, Lijiao; Nystrand, J.; Røed, K.; Röhrich, D.; Skjerdal, K.; Szostak, A.; Ullaland, K.; Øvrebekk, G.; Wagner, B.; Yang, S.; Dordic, O.; Eyyubova, G.; Kvaerno, H.; Lindal, S.; Løvhøiden, G.; Milošević, J.; Nilsson, M. S.; Qvigstad, H.; Richter, Matthias; Skaali, T. B.; Tveter, Trine Spedstad; Wikne, J.; Abelev, B.; Adam, J.; Adamová, D.; Adare, A.; Aggarwal, M. M.; Rinella, G. Aglieri; Agocs, A. G.; Agostinelli, A.; Salazar, S. Aguilar; Ahammed, Z.; Ahmad, N.; Masoodi, A. Ahmad; Ahn, S. U.; Akindinov, A.; Aleksandrov, D.; Alessandro, B.

doi:10.1140/epjc/s10052-013-2456-0

Cited by 209 publications

(159 citation statements)

References 47 publications

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“…Similarly, in Fig. 1 (right), good agreement is observed between the ALICE [13] and CMS [14] total-inelastic cross sections at √ s = 7 TeV and the RENORM prediction. Another example of the predictive power of RENORM is shown in Fig.…”

Section: Resultssupporting

confidence: 67%

See 1 more Smart Citation

Predictions of Diffractive, Elastic, Total, and Total-Inelastic pp Cross Sections vs LHC Measurements.

Goulianos¹

2013

Proceedings of XXI International Workshop on Deep-Inelastic Scattering and Related Subjects — PoS(DIS 2013)

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Section: Resultssupporting

confidence: 67%

“…(left) TOTEM measurements of the total, total-inelastic, and elastic pp cross sections at √ s = 7 TeV shown with best COMPETE fits [12], with RENORM predictions added as filled squares; (right) ALICE [13] and CMS [14] measurements of the total inelastic cross section at √ s =7 TeV show good agreement with the RENORM prediction (PYTHIA8-MBR).…”

Section: Figurementioning

confidence: 90%

Predictions of Diffractive, Elastic, Total, and Total-Inelastic pp Cross Sections vs LHC Measurements.

Goulianos¹

2013

Proceedings of XXI International Workshop on Deep-Inelastic Scattering and Related Subjects — PoS(DIS 2013)

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“…The predictions for the fluences in the inner detector are typically ∼ 5% higher with PYTHIA8 than with PHOJET. A proton-proton inelastic cross section of 71.4 mb at √ s = 7 TeV is predicted by PYTHIA8, consistent with measurements [51][52][53][54].…”

Section: Simulations and Predictionssupporting

confidence: 85%

Operation and performance of the ATLAS Semiconductor Tracker

Barlow

2013

2013 3rd International Conference on Advancements in Nuclear Instrumentation, Measurement Methods and Their Applications (ANIMM

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The semiconductor tracker is a silicon microstrip detector forming part of the inner tracking system of the ATLAS experiment at the LHC. The operation and performance of the semiconductor tracker during the first years of LHC running are described. More than 99% of the detector modules were operational during this period, with an average intrinsic hit efficiency of (99.74±0.04)%. The evolution of the noise occupancy is discussed, and measurements of the Lorentz angle, δ -ray production and energy loss presented. The alignment of the detector is found to be stable at the few-micron level over long periods of time. Radiation damage measurements, which include the evolution of detector leakage currents, are found to be consistent with predictions and are used in the verification of radiation background simulations. A Estimation of the bulk leakage current using models 52The ATLAS collaboration 57 IntroductionThe ATLAS detector [1] is a multi-purpose apparatus designed to study a wide range of physics processes at the Large Hadron Collider (LHC) [2] at CERN. In addition to measurements of Standard Model processes such as vector-boson and top-quark production, the properties of the newly discovered Higgs boson [3,4] are being investigated and searches are being carried out for as yet undiscovered particles such as those predicted by theories including supersymmetry. All of these studies rely heavily on the excellent performance of the ATLAS inner detector tracking system. The semiconductor tracker (SCT) is a precision silicon microstrip detector which forms an integral part of this tracking system. The ATLAS detector is divided into three main components. A high-precision toroid-field muon spectrometer surrounds electromagnetic and hadronic calorimeters, which in turn surround the inner detector. This comprises three complementary subdetectors: a silicon pixel detector covering radial distances 1 between 50.5 mm and 150 mm, the SCT covering radial distances from 299 mm to 560 mm and a transition radiation tracker (TRT) covering radial distances from 563 mm to 1066 mm. These detectors are surrounded by a superconducting solenoid providing a 2 T axial magnetic field. The layout of the inner detector, showing the SCT together with the pixel detector and transition radiation tracker, is shown in figure 1. The inner detector measures the trajectories of charged particles within the pseudorapidity range |η| < 2.5. It has been designed to provide a transverse momentum resolution, in the plane perpendicular to the beam axis, of 1 ATLAS uses a right-handed coordinate system with its origin at the nominal interaction point in the centre of the detector and the z-axis along the beam-pipe. The x-axis points from the interaction point to the centre of the LHC ring and the y-axis points upwards. Cylindrical coordinates (r, φ ) are used in the transverse plane, φ being the azimuthal angle around the beam-pipe. The pseudorapidity η is defined in terms of the polar angle θ as η = − ln tan(θ /2).-1 -

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“…The statistical and systematic errors are shown separately as vertical lines and boxes, respectively. In pp collisions, the spectrum is normalized to the number of all inelastic collisions (N INEL ) which includes a correction for trigger inefficiencies (see [42,43] for details). It is fitted with the following function [44][45][46] that has been used for lighter particles:…”

Section: B Spectra Of Nucleimentioning

confidence: 99%

Production of light nuclei and anti-nuclei inppand Pb-Pb collisions at energies available at the CERN Large Hadron Collider

Adam¹,

Adamová²,

Aggarwal³

et al. 2016

Phys. Rev. C

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179

172

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The production of (anti-)deuteron and (anti-) 3 He nuclei in Pb-Pb collisions at √ s NN = 2.76 TeV has been studied using the ALICE detector at the LHC. The spectra exhibit a significant hardening with increasing centrality. Combined blast-wave fits of several particles support the interpretation that this behavior is caused by an increase of radial flow. The integrated particle yields are discussed in the context of coalescence and thermal-statistical model expectations. The particle ratios, 3 He /d and 3 He /p, in Pb-Pb collisions are found to be in agreement with a common chemical freeze-out temperature of T chem ≈ 156 MeV. These ratios do not vary with centrality which is in agreement with the thermal-statistical model. In a coalescence approach, it excludes models in which nucleus production is proportional to the particle multiplicity and favors those in which it is proportional to the particle density instead. In addition, the observation of 31 anti-tritons in Pb-Pb collisions is reported. For comparison, the deuteron spectrum in pp collisions at √ s = 7 TeV is also presented. While the p/π ratio is similar in pp and Pb-Pb collisions, the d/p ratio in pp collisions is found to be lower by a factor of 2.2 than in Pb-Pb collisions.

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Measurement of inelastic, single- and double-diffraction cross sections in proton–proton collisions at the LHC with ALICE

Cited by 209 publications

References 47 publications

Predictions of Diffractive, Elastic, Total, and Total-Inelastic pp Cross Sections vs LHC Measurements.

Predictions of Diffractive, Elastic, Total, and Total-Inelastic pp Cross Sections vs LHC Measurements.

Operation and performance of the ATLAS Semiconductor Tracker

Production of light nuclei and anti-nuclei inppand Pb-Pb collisions at energies available at the CERN Large Hadron Collider

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