Measurement of Energy of Electron — Photon Cascades by Photometry of Spots on X-Ray Films

Baradzei, L.T.; Kanevskaya, E. A.; Smorodin, Yu.A.

doi:10.1007/978-1-4757-0058-9_7

Cited by 5 publications

(8 citation statements)

References 4 publications

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“…Similar alignment structures might result from exotic hadron production processes [33]. Aligned event structures were, for instance, reported by the PAMIR experiment [34,35,36].…”

Section: Tests With Hadronic Observablesmentioning

confidence: 83%

Tests of hadronic interaction models by data of the KASCADE-Grande air-shower experiment

Haungs¹,

Risse²,

Apel³

et al. 2006

Czech J Phys

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KASCADE-Grande is a multi-detector setup to get redundant information on single air shower basis. The information is used to perform multi-parameter analyses to solve the threefold problem of the reconstruction of the unknown primary energy, the primary mass, and to quantify the characteristics of the hadronic interactions in the air-shower development. This contribution discusses the various ways of testing the hadronic interaction mechanisms with data of the original KASCADE experiment and their results, as well as the capabilities in testing the models with the extension of KASCADE, the KASCADE-Grande experiment. Though no hadronic interaction model is fully able to describe the multi-parameter data of KASCADE consistently, the more recent models or improved versions of older models reproduce the data better than a few years ago.PACS : 96.50.sd

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“…Similar alignment structures might result from exotic hadron production processes [33]. Aligned event structures were, for instance, reported by the PAMIR experiment [34,35,36].…”

Section: Tests With Hadronic Observablesmentioning

confidence: 83%

Tests of hadronic interaction models by data of the KASCADE-Grande air-shower experiment

Haungs¹,

Risse²,

Apel³

et al. 2006

Czech J Phys

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“…The KASCADE data can be compared to the λ 4 distribution measured by the PAMIR detector. PAMIR [9,10] is an emulsion chamber experiment located at an altitude of 4360 m a.s.l. (corresponding to 600 g cm −2 atmospheric depth), measuring air shower hadrons and photons with a particle energy threshold of a few TeV.…”

Section: Discussionmentioning

confidence: 99%

“…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: 88%

“…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]. An excess of events with substructure alignment above background fluctuations was found in the data for primary energies above an energy threshold of 8−10 PeV (see e.g.…”

Section: Introductionmentioning

confidence: 99%

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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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“…When hitting the XREC, the high-energy gamma rays from π 0 decays which have taken place in the air above the installation initiate electron-photon cascades within the dense lead absorber, with the total amount of electrons at the maximum of cascade development depending on the energy of initial gamma quantum. In an electromagnetic cascade originating from a TeV energy quantum and developing in lead the peak density of electrons is sufficient to cause darkening of X-ray emulsion, such that the value of particles density at cascade maximum, as well as the energy of the initial quantum and of its parent pion can be estimated through photodensitometry of the darkened spot in the film [30,31,32].…”

Section: The Basics Of the X-ray Emulsion Techniquementioning

confidence: 99%

Scaling violation in interaction of cosmic ray hadrons and the nature of the 3 PeV knee in the spectrum of primary cosmic rays

Shaulov,

Shepetov,

Kupriyanova

et al. 2021

Preprint

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Energy spectra of the most energetic hadrons in the core region of extensive air showers (EAS) were studied in dependence on the EAS energy E 0 in the hybrid experiment HADRON at the Tien Shan mountain cosmic ray station. For the first time by direct measurement it was found in this experiment that the slope of the power energy spectrum of EAS hadrons diminishes itself locally, and the average hadron energy, correspondingly, increases between the E 0 borders 3 PeV and 20 PeV. Such behavior agrees with threshold appearance in EAS, in the same energy range, of a long-flying penetrative component which was earlier revealed at the Tien Shan station. Now we reconsider this Tien Shan result in comparison with the new data of modern collider experiments. The analysis permits to state unambiguously an astrophysical nature of the penetrative EAS component, and to discuss its probable connection with the origin of the famous knee in the energy spectrum of cosmic rays at E 0 3 PeV.

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Measurement of Energy of Electron — Photon Cascades by Photometry of Spots on X-Ray Films

Cited by 5 publications

References 4 publications

Tests of hadronic interaction models by data of the KASCADE-Grande air-shower experiment

Tests of hadronic interaction models by data of the KASCADE-Grande air-shower experiment

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

Scaling violation in interaction of cosmic ray hadrons and the nature of the 3 PeV knee in the spectrum of primary cosmic rays

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