Zobrazeno 1 - 10
of 127
pro vyhledávání: '"Maccione Luca"'
Publikováno v:
Phys. Rev. D 89, 083007 (2014)
The PAMELA collaboration recently released the $e^+$ absolute spectrum between 1 and 300 GeV in addition to the positron fraction and the $e^-$ spectrum previously measured in the same period. We use the newly developed three-dimensional upgrade of t
Externí odkaz:
http://arxiv.org/abs/1311.5575
Autor:
Liberati, Stefano, Maccione, Luca
Publikováno v:
Phys. Rev. Lett. 112, 151301 (2014)
The emergence of a classical spacetime from any quantum gravity model is still a subtle and only partially understood issue. If indeed spacetime is arising as some sort of large scale condensate of more fundamental objects then it is natural to expec
Externí odkaz:
http://arxiv.org/abs/1309.7296
Autor:
Gaggero, Daniele, Maccione, Luca
Publikováno v:
JCAP12(2013)011
We model the CR leptonic fluxes above 20 GeV in terms of a superposition of a standard and a charge symmetric extra component, which we generically describe as power-laws in momentum. We investigate under these hypotheses the compatibility between AM
Externí odkaz:
http://arxiv.org/abs/1307.0271
The Fermi-LAT collaboration recently confirmed a discrepancy between the observed longitudinal profile of gamma-ray diffuse emission from the Galaxy and that computed with numerical codes assuming that Cosmic Rays (CRs) are produced by Galactic super
Externí odkaz:
http://arxiv.org/abs/1306.6849
We present here a major upgrade of DRAGON, a numerical package that computes the propagation of a wide set of CR species from both astrophysical and exotic origin in the Galaxy in a wide energy range from tens of MeV to tens of TeV. DRAGON takes into
Externí odkaz:
http://arxiv.org/abs/1306.6850
We take advantage of the cosmic-ray (CR) proton data collected by the PAMELA detector in several campaigns covering the period 2006-2009 to derive the local interstellar CR proton spectrum (LIS), outside the solar system. We describe the propagation
Externí odkaz:
http://arxiv.org/abs/1306.1354
Publikováno v:
Phys. Rev. Lett. 111, 021102 (2013)
We study the compatibility of Alpha Magnetic Spectrometer (AMS-02) data on the cosmic-ray (CR) positron fraction with data on the CR electron and positron spectra provided by PAMELA and Fermi LAT. We do that in terms of a novel propagation model in w
Externí odkaz:
http://arxiv.org/abs/1304.6718
Autor:
Maccione, Luca
Publikováno v:
Phys. Rev. Lett. 110, 081101 (2013)
We compute cosmic ray (CR) nuclei, proton, antiproton, electron and positron spectra below 1 TeV at Earth by means of a detailed transport description in the galaxy and in the solar system. CR spectra below 10 GeV are strongly modified by charge-sign
Externí odkaz:
http://arxiv.org/abs/1211.6905
Autor:
Meyer, Manuel, Horns, Dieter, Maccione, Luca, Mirizzi, Alessandro, Montanino, Daniele, Roncadelli, Marco
Very high energy (VHE, energy >~ 100 GeV) {\gamma}-rays originating from extragalactic sources interact with low energy photons of background radiation fields and produce electron-positron pairs. Alternatively, in the presence of ambient magnetic fie
Externí odkaz:
http://arxiv.org/abs/1211.6408
Publikováno v:
JCAP03(2013)036
A multichannel analysis of cosmic ray electron and positron spectra and of the diffuse synchrotron emission of the Galaxy is performed by using the DRAGON code. This study is aimed at probing the interstellar electron source spectrum down to E ~ 1 Ge
Externí odkaz:
http://arxiv.org/abs/1210.4546