Extra dimensions and strong neutrino-nucleon interactions above 1019 eV: breaking the GZK barrier
نویسندگان
چکیده
منابع مشابه
0 Extra dimensions and Strong Neutrino - Nucleon interactions above 10 19 eV : Breaking the GZK Barrier
Cosmic ray events above 10eV are on the verge of confronting fundamental particle physics. The neutrino is the only candidate primary among established particles capable of crossing 100 Mpc intergalactic distances unimpeded. We argue that consistency with the Standard Model at low energies, together with large interactions at high energies, directly indicates new physics of massive spin-2 excha...
متن کاملExtra dimensions and Strong Neutrino - Nucleon interactions above 10 19 eV : Breaking the GZK Barrier
Cosmic ray events above 10eV are on the verge of confronting fundamental particle physics. Neutrino is the only candidate primary among established particles capable of crossing 100 Mpc intergalactic distances unimpeded. The magnitude of νN cross sections indicated by events, plus consistency with the Standard Model at low-energy, point to new physics of massive spin-2 exchange. In models based...
متن کاملM ay 2 00 0 Extra Dimensions and Strong Neutrino - Nucleon Interactions Above 10 19 eV : Breaking the GZK Barrier
Cosmic ray events above 10 eV are on the verge of confronting fundamental particle physics. The neutrino is the only candidate primary among established particles capable of crossing 100 Mpc intergalactic distances unimpeded. The magnitude of νN cross sections indicated by events, plus consistency with the Standard Model at low-energy, point to new physics of massive spin-2 exchange. In models ...
متن کامل0 The GZK Bound and Strong Neutrino - Nucleon Interactions above 10 19 eV : a Progress Report
Cosmic ray events above 10 eV have posed a fundamental problem for more than thirty years. Recent measurements indicate that these events do not show the features predicted by the GZK bound. The events may, in addition, display angular correlations with points sources. If these observations are confirmed for point sources further than 50-100Mpc, then strong interactions for the ultra-high energ...
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“GZK photons” are produced by extragalactic nucleons through the resonant photoproduction of pions. We present the expected range of the GZK photon fraction of UHECR, assuming a particular UHECR spectrum and primary nucleons, and compare it with the minimal photon fraction predicted by Top-Down models. The Pierre Auger Observatory [1] may prove photon fractions in the Ultra-High Energy Cosmic R...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2000
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(00)00647-x