A cosmic-ray nuclear event with an anomalously strong concentration of energy and particles in the central region

Amato, N. M.; Arata, N.; Maldonado, R. H. C.

doi:10.1007/bf02507251

Cited by 4 publications

(8 citation statements)

References 5 publications

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“…For the meson case, we use a parametrization made by Portella [24] that relates the charged pion-tonucleon ratio at mountain altitudes. In section III we compare these fluxes with the data of some halo events (P06, Ursa Maior, Andromeda and Mini-Andromeda III) [6][7][8]. In section IV we discuss the results and make some remarks and conclusions.…”

Section: Introductionmentioning

confidence: 94%

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Integral energy spectra of hadrons induced by one-single nucleon by the method of characteristics

Tsui¹,

Portella²,

Gomes³

et al. 2007

Braz. J. Phys.

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Hadron energy spectra induced by one-single nucleon are obtained solving diffusion equations by the method of characteristics. Our solutions are a generalization of earlier papers that allow us to calculate hadron fluxes including the energy dependence of the interaction lengths and inelasticities. A comparison with the integral hadron spectra of the so-called "halo events" detected by the Brazil-Japan Collaboration at Mt. Chacaltaya is made, in order to test our solutions. A reasonable agreement between then is obtained, considering the rising with energy of the nucleon inelasticity coefficient.

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Section: Introductionmentioning

confidence: 94%

“…About 20 events have been observed in the visible energy region E ≥ 1000 TeV . Approximately, half of them [5][6][7][8] are associated with an uniform darkened wide area on X-ray films. This area, in the central part, is called "halo" and so these events are called "halo events".…”

Section: Introductionmentioning

confidence: 99%

Integral energy spectra of hadrons induced by one-single nucleon by the method of characteristics

Tsui¹,

Portella²,

Gomes³

et al. 2007

Braz. J. Phys.

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“…The alignment of the products of very high-energy interactions seen in mountain altitude experiments is one of the most puzzling phenomena in cosmic ray physics for quite a long time. The observations of the Pamir [48], Chacaltaya [49] and Mt Kanbala [50] emulsion chamber groups and by the Tien-Shan [51] extensive air shower experiment, together with a very clear event seen in the Concorde French-Japanese experiment in the stratosphere [52], makes the experimental basis very substantial. The effect occurs, according to [53], at a primary particle energy of 8 × 10 15 eV above which the rate increases rapidly with interaction energy.…”

Section: Alignmentmentioning

confidence: 99%

High-energy interactions around the `knee'

Wibig¹

2001

J. Phys. G: Nucl. Part. Phys.

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The turn of the millennium gives a perfect opportunity to summarize the past achievements in any particular field of knowledge and to formulate the propositions for the future prospects. In this paper a brief overview of the evolution of our understanding of soft interaction physics is given as well as the present ideas and problems concerning multiparticle production at very high energies. Some intriguing possibilities out of the mainstream of high-energy physics (HEP) are discussed.

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“…About twenty events were observed in the visible energy region E ≥ 1000 T eV . Approximately, half of them [1,2,3,4] were associated with a uniformly darkened wide area on X-ray films. The central part of this area was called "halo", and so these events were called "halo events".…”

Section: Introductionmentioning

confidence: 99%

“…For the pion case, the Faltung representation of the transformed equation is treated in section 5, and the s = s 0 simple and s = 0 and s = −1 essential residues are evaluated in section 6. In section 7, we compare these fluxes with the halo event data of P06, Ursa Maior, Andromeda and Mini-Andromeda III [2,3,4] with discussions and conclusions.…”

Section: Introductionmentioning

confidence: 99%

Faltung formulation of hadron halo event cascade at Mt. Chacaltaya

Tsui,

Portella,

Navia

et al. 2007

Preprint

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It is shown that the fundamental standard hadron cascade diffusion equation in the Mellin transform space is not rigorously correct because of the inconsistent double energy integral evaluation which generates the function < η s > with its associated parametizations. To ensure an exact basic working equation, the Faltung integral representation is introduced which has the elasticity distribution function u(η) as the only fundamental input function and < η s > is just the Mellin transform of u(η). This Faltung representation eliminates standard phenomenological parameters which serve only to mislead the physics of cascade. The exact flux transform equation is solved by the method of characteristics, and the hadron flux in real space is obtained by the inverse transform in terms of the simple and essential residues. Since the essential residues are given by the singularities in the elasticity distribution and particle production transforms that appear in the exponentials, these functions should not be parametized arbitrarily to avoid introducing non-physical essential residues. This Faltung formulation is applied to the charged hadron integrated energy spectra of halo events detected at Mt. Chacaltaya by the Brazil-Japan Collaboration, where the incoming flux at the atmospheric boundary is a single energetic nucleon.

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A cosmic-ray nuclear event with an anomalously strong concentration of energy and particles in the central region

Cited by 4 publications

References 5 publications

Integral energy spectra of hadrons induced by one-single nucleon by the method of characteristics

Integral energy spectra of hadrons induced by one-single nucleon by the method of characteristics

High-energy interactions around the `knee'

Faltung formulation of hadron halo event cascade at Mt. Chacaltaya

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