Beyond the MSW effect: Neutrinos in a dense medium

Capolupo, Antonio; Giampaolo, Salvatore Marco; Quaranta, Aniello (2021) Beyond the MSW effect: Neutrinos in a dense medium. Physics Letters B, 820 . ISSN 0370-2693

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Abstract

We present a theory of neutrino oscillations in a dense medium which goes beyond the effective matter potential used in the description of the MSW effect. We show how the purity of the neutrino state is degraded by neutrino interactions with the environment and how neutrino–matter interactions can be a source of decoherence. We present new oscillation formulae for neutrinos interacting with leptons and carry out a numerical analysis which exhibits deviations from the MSW formulae for propagation through the Earth of ultra-high energy neutrinos. In particular, we show that at high density and/or high neutrino energy, the vanishing transition probabilities derived for MSW effect, are non zero when the scattering is taken into account.

Item Type:	Article
Uncontrolled Keywords:	neutrinos oscillations; decoherence
Subjects:	NATURAL SCIENCES > Physics
Divisions:	Theoretical Physics Division
Projects:	Project title Project leader Project code Project type Frustrirani kompleksni sustavi-FCS Salvatore Marco Giampaolo; Tena Dubček IP-2019-04-3321 HRZZ Provedba vrhunskih istraživanja u sklopu Znanstvenog centra izvrsnosti za kvantne i kompleksne sustave te reprezentacije Liejevih algebri-QuantiXLie Hrvoje Buljan; Pavle Pandžić; Vit Tuček; Tomislav Marketin KK.01.1.1.01.0004 EK
Depositing User:	Ana Zečević
Date Deposited:	26 Feb 2024 11:44
URI:	http://fulir.irb.hr/id/eprint/8629
DOI:	10.1016/j.physletb.2021.136489

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