Dual parton model with complete formation zone intranuclear cascade for the description of particle production in hadron-nucleus and nucleus-nucleus interactions

Möhring, H.‐J.; Ranft, J.

doi:10.1007/bf01562339

Cited by 56 publications

(54 citation statements)

References 21 publications

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“…We use an analytical approximation of the source function based on numerical results using the Monte-Carlo particle interaction code DTUNUC (V2.2) (Möhring & Ranft 1991;Ranft et al 1994;Ferrari et al 1996;Engel et al 1997), which is based on a dual parton model (Capella et al 1994). One has the representation…”

Section: The Evolution Of High Energy Photon Spectramentioning

confidence: 99%

Channelled relativistic outflows in active galactic nuclei: analytic solutions for the evolution of particle spectra

Schuster¹,

Lerche

Schlickeiser³

et al. 2006

A&A

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Context. Calculations of highly energetic neutrino and TeV γ-ray emission from relativistic jets of Active Galactic Nuclei (AGN) are often based on a model that involves a collimated relativistic blast wave, in which the spectral evolution of energetic particles is determined by the interplay between the particle injection by sweep up of the interstellar medium, energy losses by radiation and diffusive escape. Aims. To date such models only have been solved numerically because of the highly non-linear nature of the time-dependent equations describing particle spectra and bulk energy loss. However it is difficult to see how parameters and groupings of parameters influence the resulting numerical solutions, except through intensive investigations of many numerical simulations. Therefore analytic solutions are particularly helpful. Methods. We provide exact mathematical solutions to a very broad class of AGN type models. By selecting different functional behaviors of parameter values, we cover a large compendium of possible situations. The comparison of the exact solutions with observational information can help to improve our understanding of the evolution of individual AGN. Exact solutions can also be used to provide controls on the appropropriateness and accuracy of numerical programs used to solve the equations. Results. We provide an analytical description of the evolution of proton spectra according to the pick-up model. We analyze the behavior of the particle spectra in the plasma frame. The solutions are determined by two competing processes: the deceleration of the jet plasmoid and particle cooling via radiation.

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Section: The Evolution Of High Energy Photon Spectramentioning

confidence: 99%

Channelled relativistic outflows in active galactic nuclei: analytic solutions for the evolution of particle spectra

Schuster¹,

Lerche

Schlickeiser³

et al. 2006

A&A

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“…For the calculation of the pion source spectra we use the Monte-Carlo model DTUNUC (V2.2) (Möhring & Ranft 1991;Ranft et al 1994;Ferrari et al 1996a;Engel et al 1997), which is based on a dual parton model (Capella et al 1994). Here we are concerned with high energetic neutrinos resulting from the decays of pions Fig.…”

Section: The Production Of High Energetic Neutrinosmentioning

confidence: 99%

Neutrinos from active galactic nuclei as a diagnostic tool

Schuster

Pohl

Schlickeiser

2002

A&A

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Abstract. Active galactic nuclei (AGN) are known as sources of high energy γ-rays. The emission probably results from non-thermal radiation of relativistic jets belonging to the AGN. Earlier investigations of these processes have suggested that neutrinos are among the radiation products of the jets and may be used to discriminate between hadrons and leptons as primary particles for the production of the high energy emission. Our calculation of the high energy neutrino emission from the jets of AGN is based on a recently published model for γ-ray production by a collimated, relativistic blast wave, in which the spectral evolution of energetic particles is determined by the interplay between the particle injection by sweep-up of the interstellar medium, the energy losses through radiation, and diffusive escape. It is important to note that the swept-up interstellar particles retain their relative velocities with respect to the jet plasma, but get isotropised in the jet rest frame by self-excited Alfvénic turbulence. The bulk of the neutrino emission is expected in the energy range between 100 GeV and a few TeV. It is shown that the neutrino flux is correlated with the flux of TeV γ-rays. This allows to distinctly search for neutrino emissions from the jets of AGN by using the TeV γ-ray light curves to drastically reduce the temporal and spatial parameter space. Given the observed TeV photon fluxes from nearby BL Lacs the neutrino signal from AGN may be detectable with future neutrino observatories as least as sensitive as IceCube.

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“…In the following we summarize the main ideas of the FZIC model for hadronnucleus and nucleus-nucleus interactions [7,8,9,4,10,11]. The physical picture explaining the absence of the intranuclear cascade at high energies is the concept of the formation zone [19].…”

Section: The Formation Zone Cascade In Target and Projectile Nucleimentioning

confidence: 99%

“…Reinteractions beyond 5 GeV occur much less frequently than reinteractions below 5 GeV and a more detailed treatment would not change the results discussed in this paper. Furthermore, we take into account absorption of low-energy mesons and antiprotons by interactions with two-nucleon systems (for pion absorption we use the cross sections as given by Ritchie [23]) and Pauli's principle [9]. In case no interaction is possible in the considered spectator, we proceed with sampling a cascade step in another spectator.…”

Section: The Formation Zone Cascade In Target and Projectile Nucleimentioning

confidence: 99%

Deviations from the superposition model in a Dual Parton Model with formation zone cascade in both projectile and target nuclei

Battistoni

Forti

Ranft

et al. 1997

Astroparticle Physics

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A Dual Parton Model with a formation zone intranuclear cascade in the spectators of the projectile and target nuclei is studied. The hadrons produced in the formation zone cascade contribute to Feynman-x F and lab-x distributions in the fragmentation regions of the target and projectile nuclei. We discuss the consequences of this model in the secondary cosmic ray production, by analyzing the calculated spectrum weighted moments for pion and kaon production. We show that the proposed model leads to significant differences with respect to a simple superposition model, where the nucleus-nucleus collision is replaced by a few corresponding nucleonnucleus collisions.

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Dual parton model with complete formation zone intranuclear cascade for the description of particle production in hadron-nucleus and nucleus-nucleus interactions

Cited by 56 publications

References 21 publications

Channelled relativistic outflows in active galactic nuclei: analytic solutions for the evolution of particle spectra

Channelled relativistic outflows in active galactic nuclei: analytic solutions for the evolution of particle spectra

Neutrinos from active galactic nuclei as a diagnostic tool

Deviations from the superposition model in a Dual Parton Model with formation zone cascade in both projectile and target nuclei

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