Characteristics of coplanar superhigh energy events produced in nuclear interactions at E0 ≥ 8 PeV

Borisov, A. S.; Maximenko, V.M.; Puchkov, V. S.; Slavatinsky, S. A.; Mukhamedshin, R. A.

doi:10.1016/s0920-5632(99)00311-4

Cited by 13 publications

(12 citation statements)

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“…Similar alignment structures might result from exotic hadron production processes [8]. Therefore, it is not surprising that the observation of aligned structures in a number of emulsion chamber experiments has initiated considerable experimental and theoretical efforts over the last two decades [7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26]. Aligned event structures were, for instance, reported by the PAMIR experiment [9,10].…”

Section: Introductionmentioning

confidence: 85%

Geometric structures in hadronic cores of extensive air showers observed by KASCADE

Antoni¹,

Apel²,

Badea³

et al. 2005

Phys. Rev. D

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The geometric distribution of high-energy hadrons ≥100 GeV in shower cores measured with the KASCADE calorimeter is analyzed. The data are checked for sensitivity to hadronic interaction features and indications of new physics as discussed in the literature. The angular correlation of the most energetic hadrons and in particular the fraction of events with hadrons being aligned are quantified by means of the commonly used parameter λ4. The analysis shows that the observed λ4 distribution is compatible with that predicted by simulations and is not linked to an angular correlation from hadronic jet production at high energy. Another parameter, d max 4, describing distances between hadrons measured in the detector, is found to be sensitive both to the transverse momenta in secondary hadron production and the primary particle type. Transverse momenta in high-energy hadron interactions differing by a factor two or more from what is assumed in the standard simulations are disfavoured by the measured d distribution.

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Section: Introductionmentioning

confidence: 85%

Geometric structures in hadronic cores of extensive air showers observed by KASCADE

Antoni¹,

Apel²,

Badea³

et al. 2005

Phys. Rev. D

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“…Signatures of the CPG observed in mountain-based experiments correspond to hadron-nucleus interaction energies being as high as √ s 4 TeV, i.e., E 0 10 16 eV [11]. It means that at these relatively low energies the CPG cross section is already comparable with the proton's inelastic one and can present its large fraction.…”

Section: Qualitative Description Of Simulation Algorithmmentioning

confidence: 95%

“…That is caused by the destructive role of cascade development following CPG interactions. As a result, at mountain levels it is necessary to separate energy flows in γ -families, not single particles, with using a so called decascading algorithm [11,28] for the following analysis.…”

Section: Coplanarity In Xrec Experimentsmentioning

confidence: 99%

“…Pamir (Pb-XREC) λ 4 ≥ 0.8, E γ ≥ 700 TeV 6 from 14 0.43 ± 0.13 [3] Pamir (C-XREC) λ 4 ≥ 0.8, E γ ≥ 700 TeV 5 from 35 0.15 ± 0.05 [5] Mt.Kanbala (Fe-XREC) λ 3 ≥ 0.8, E γ ≥ 500 TeV 6 from 12 0.5 ± 0.13 [6] the Strana λ 4 = 0.99, E γ 1500 TeV 1 1 [12,13] the JF2af2 the decascading algorithm with z c = 5 TeV·cm for Pamir's XRECs [11,28] Let us attempt to find estimates of probabilities, w i , to gain the real (or larger) experimental number of coplanar families in the framework of different FANSY's versions. Results are shown in Table 4.3.…”

Section: Coplanarity In Xrec Experimentsmentioning

confidence: 99%

“…The effect has been first found by the Pamir Collaboration in X-ray-emulsion chamber (XREC) experiments [1][2][3][4][5] and confirmed later in other mountain [6] and stratospheric [7][8][9][10] experiments. While assuming this observable effect to be produced by well-known elementary a e-mail: muhamed@sci.lebedev.ru particles, it is related to hadron-nucleus interactions at superhigh energies (E 0 10 16 eV [11], i.e., √ s 4 TeV) and can be characterized by large average transverse momenta, for instance, up to ∼ n × 10 GeV/c as early as at E 0 ∼ 10 16 eV [12,13].…”

Section: Introductionmentioning

confidence: 99%

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FANSY 1.0: a phenomenological model for simulation of coplanar particle generation in superhigh-energy hadron interactions

Mukhamedshin

2009

Eur. Phys. J. C

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Simulations show that a phenomenon of coplanarity of most energetic subcores of γ -ray-hadron families found in mountain-based and stratospheric X-ray-emulsion chamber experiments requires to introduce a coplanar particle generation with large transverse momenta in hadron interactions at superhigh energies. Some physical mechanisms are considered. A phenomenological model, which makes it possible to simulate the coplanar particle generation, is presented. Different versions of this model are considered, their features are described and compared with those of models applied by the CORSIKA package. Cosmic-ray experimental data and simulated results are compared. Conclusion on features of hadron interactions at superhigh energies and some predictions with respect to LHC experiments are made.PACS 02.70.Uu · 12.90.+b · 13.85.-t

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Cosmic Ray Interactions near the LHC energy range (approach with XREC at mountain altitude and in the stratosphere)

Capdevielle

2008

Nuclear Physics B - Proceedings Supplements

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Characteristics of coplanar superhigh energy events produced in nuclear interactions at E0 ≥ 8 PeV

Cited by 13 publications

References 0 publications

Geometric structures in hadronic cores of extensive air showers observed by KASCADE

Geometric structures in hadronic cores of extensive air showers observed by KASCADE

FANSY 1.0: a phenomenological model for simulation of coplanar particle generation in superhigh-energy hadron interactions

Cosmic Ray Interactions near the LHC energy range (approach with XREC at mountain altitude and in the stratosphere)

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