Why Tau First?

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dc.creatorFargion, D.
dc.creatorD'Armiento, D.
dc.creatorDe Sanctis, P. G. Lucentini
dc.date2007-08-27
dc.date2007-08-27
dc.date.accessioned2026-07-07T09:20:05Z
dc.date.available2026-07-07T09:20:05Z
dc.descriptionElectron neutrino has been the first neutral lepton to be foreseen and discovered last century. The un-ordered muon and its neutrino arose later by cosmic rays. The tau discover, the heaviest, the most unstable charged lepton, was found surprisingly on 1975. Its neutrino was hardly revealed just on 2000. So why High Energy Neutrino Astronomy should rise first via tau neutrino, the last, the most rare one? The reasons are based on a chain of three favorable coincidences found last decade: the neutrino masses and their flavor mixing, the UHECR opacity on Cosmic Black Body (GZK cut off on BBR), the amplified tau air-shower decaying in flight. Indeed guaranteed UHE GZK tau neutrinos, feed by muon mixing, while skimming the Earth might lead to boosted UHE tau, mostly horizontal ones. These UHE lepton decay in flight are spread, amplified, noise free Air-Shower: a huge event for an unique particle. To be observed soon: within Auger sky, in present decade. Its discover may sign of the first tau appearance.
dc.description8 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/0708.3645
dc.identifierhttp://arxiv.org/abs/0708.3645
dc.identifierFrascati Physics Series Vol. XLV (2007) pp.289-297
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/154616
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.titleWhy Tau First?
dc.typetext

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