Hadron-Hadron and Cosmic-Ray Interactions at multi-TeV Energies

Alessandro, B.; Bergman, D. R.; Bongi, M.; Bunyatyan, A.; Cazón, L.; d’Enterria, D.; Mitri, I. De; Döll, P.; Engel, R.; Eggert, K.; Garzelli, Maria Vittoria; Gerhardt, L.; Gieseke, Stefan; Godbole, R. M.; Grosse-Oetringhaus, J. F.; Gustafson, G.; Hebbeker, T.; Kheyn, Lev; Kiryluk, J.; Lipari, P.; Ostapchenko, S.; Pierog, T.; Piskounova, O. I.; Ranft, J.; Rezaeian, Amir H.; Rostovtsev, A.; Sakurai, N.; Sapeta, Sebastian; Schleich, S.; Schulz, H.; Sjöstrand, Torbjörn; Sonnenschein, L.; Sutton, M. R.; Ulrich, R.; Werner, K.; Zapp, Korinna Christine

doi:10.48550/arxiv.1101.1852

Cited by 6 publications

(4 citation statements)

References 20 publications

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“…The Large Hadron Collider (LHC) at the CERN laboratory allows us to access for the first time the energy region above the knee in the laboratory. Therefore an analysis of inclusive particle data taken at the LHC is particularly interesting for constraining existing hadronic interaction models and for testing possible new mechanisms of hadron production [32]. Data from LHC experiments published so far have mostly been taken with detectors covering the central phase space region in pseudorapidity (|η| 2.5).…”

Section: Introductionmentioning

confidence: 99%

Constraints from the first LHC data on hadronic event generators for ultra-high energy cosmic-ray physics

d’Enterria

Engel

Pierog

et al. 2011

Astroparticle Physics

174

121

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25 pages, 12 figuresThe determination of the primary energy and mass of ultra-high-energy cosmic-rays (UHECR) generating extensive air-showers in the Earth's atmosphere, relies on the detailed modeling of hadronic multiparticle production at center-of-mass (c.m.) collision energies up to two orders of magnitude higher than those studied at particle colliders. The first Large Hadron Collider (LHC) data have extended by more than a factor of three the c.m. energies in which we have direct proton-proton measurements available to compare to hadronic models. In this work we compare LHC results on inclusive particle production at energies sqrt(s) = 0.9, 2.36, and 7 TeV to predictions of various hadronic Monte Carlo (MC) models used commonly in cosmic-ray (CR) physics (QGSJET, EPOS and SIBYLL). As a benchmark with a standard collider physics model we also show PYTHIA (and PHOJET) predictions with various parameter settings. While reasonable overall agreement is found for some of the MC, none of them reproduces consistently the sqrt(s) evolution of all the observables. We discuss implications of the new LHC data for the description of cosmic-ray interactions at the highest energies

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Section: Introductionmentioning

confidence: 99%

Constraints from the first LHC data on hadronic event generators for ultra-high energy cosmic-ray physics

d’Enterria

Engel

Pierog

et al. 2011

Astroparticle Physics

174

121

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“…Many other models for the structure of hadronic events have been formulated, that are all based on some kind of multiple interactions framework, be it in the form of soft or (semi)hard interactions, or a mixture thereof [10]. A few implementations are formulated with a view to be used also for hard-scale physics within and beyond the Standard Model [11], such as Herwig [12][13][14][15][16][17] and Sherpa [18,19].…”

Section: Introductionmentioning

confidence: 99%

Multiparton interactions with an x-dependent proton size

Corke

Sjöstrand

2011

J. High Energ. Phys.

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Theoretical arguments, supported by other indirect evidence, suggest that the wave function of high-x partons should be narrower than that of lowx ones. In this article, we present a modification to the variable impact parameter framework of Pythia 8 to model this effect. In particular, a Gaussian hadronic matter profile is introduced, with a width dependent on the x value of the constituent being probed. Results are compared against the default single-and double-Gaussian profiles, as well as an intermediate overlap function.

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“…The energy dependence of total hadronic cross sections is probably the most important question for the cosmic-ray community. The phase space regions of relevance to the development of Air showers are not directly accessible in the currently accelerator experiments, and, because of that, descriptions and interpretations of the data in cosmic rays physics at high energies depend crucially on the predictions coming from phenomenological models [27].…”

Section: Eikonalized Minijet Model With Saturation Effectsmentioning

confidence: 99%

Nonlinear effects and the behavior of total hadronic and photonic cross sections

Giannini

Durães

2013

Phys. Rev. D

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In this paper we use an eikonalized minijet model where the effects of the first nonlinear corrections to the DGLAP equations are taken into account. The contributions coming from gluon recombination effects are included in the DGLAP þ GLRMQ approach for the free proton in the context of saturation models. The parameters of the model are fixed to fit total pp and "pp cross sections, including the very recent data from LHC, HiRes, and Pierre Auger collaborations. Glauber and multiple scattering approximations are then used to describe the inclusive inelastic proton-Air cross section. Photoproduction cross sections, without change of parameters fixed before, are also obtained from the model using vector meson dominance and the additive quark model. We show and discuss our main results as well as the implications of saturation effects in the behavior of total hadronic and photonic cross sections at very high energies.

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Hadron-Hadron and Cosmic-Ray Interactions at multi-TeV Energies

Cited by 6 publications

References 20 publications

Constraints from the first LHC data on hadronic event generators for ultra-high energy cosmic-ray physics

Constraints from the first LHC data on hadronic event generators for ultra-high energy cosmic-ray physics

Multiparton interactions with an x-dependent proton size

Nonlinear effects and the behavior of total hadronic and photonic cross sections

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