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Damping signatures in future neutrino oscillation experiments
KTH, Skolan för teknikvetenskap (SCI), Teoretisk fysik, Teoretisk partikelfysik.ORCID-id: 0000-0001-5948-9152
KTH, Skolan för teknikvetenskap (SCI), Teoretisk fysik, Teoretisk partikelfysik.ORCID-id: 0000-0002-3525-8349
School of Natural Sciences, Institute for Advanced Study, Princeton, United States.
2005 (engelsk)Inngår i: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, Vol. 2005, nr 06, s. 049-Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We discuss the phenomenology of damping signatures in the neutrino oscillation probabilities, where either the oscillating terms or the probabilities can be damped. This approach is a possibility for tests of damping effects in future neutrino oscillation experiments, where we mainly focus on reactor and long-baseline experiments. We extensively motivate different damping signatures due to small corrections by neutrino decoherence, neutrino decay, oscillations into sterile neutrinos, or other mechanisms, and classify these signatures according to their energy ( spectral) dependencies. We demonstrate, at the example of short baseline reactor experiments, that damping can severely alter the interpretation of results, e. g., it could fake a value of sin(2)(2 theta(13)) smaller than the one provided by Nature. In addition, we demonstrate how a neutrino factory could constrain different damping models with emphasis on how these different models could be distinguished, i.e., how easily the actual type of effect could be identified. We find that the damping models cluster in different categories, which can be much better distinguished from each other than models within the same cluster.

sted, utgiver, år, opplag, sider
IOP Publishing , 2005. Vol. 2005, nr 06, s. 049-
Emneord [en]
Solar and atmospheric neutrinos, neutrino physics
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-7247DOI: 10.1088/1126-6708/2005/06/049ISI: 000230409600036Scopus ID: 2-s2.0-22144490532OAI: oai:DiVA.org:kth-7247DiVA, id: diva2:12202
Forskningsfinansiär
Swedish Research Council, 621-2001-1611Swedish Research Council, 621-2002-3577
Merknad

QC 20100630

Tilgjengelig fra: 2011-06-17 Laget: 2007-05-31 Sist oppdatert: 2017-12-14bibliografisk kontrollert
Inngår i avhandling
1. Theoretical and Phenomenological Studies of Neutrino Physics
Åpne denne publikasjonen i ny fane eller vindu >>Theoretical and Phenomenological Studies of Neutrino Physics
2007 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

This thesis is devoted to the theory and phenomenology of neutrino physics. While the standard model of particle physics has been extremely successful, it fails to account for massive neutrinos, which are necessary to describe the observations of neutrino oscillations made by several different experiments. Thus, neutrino physics is a possible window for exploring the physics beyond the standard model, making it both interesting and important for our fundamental understanding of Nature.

Throughout this thesis, we will discuss different aspects of neutrino physics, ranging from taking all three types of neutrinos into account in neutrino oscillation experiments to exploring the possibilities of neutrino mass models to produce a viable source of the baryon asymmetry of the Universe. The emphasis of the thesis is on neutrino oscillations which, given their implication of neutrino masses, is a phenomenon where other results that are not describable in the standard model could be found, such as new interactions between neutrinos and fermions.

sted, utgiver, år, opplag, sider
Stockholm: Teoretisk fysik, 2007. s. xii, 102, [7]
Serie
Trita-FYS, ISSN 0280-316X ; 2007:31
Emneord
neutrino mass, neutrino mixing, neutrino oscillations, matter effects, non-standard effects, the day-night effect, solar neutrinos, accelerator neutrinos, exact solutions, three-flavor effects, large density, neutrino decay, neutrino decoherence, neutrino absorption, non-standard neutrino interactions, seesaw mechanism, stability criteria, leptogenesis
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-4415 (URN)978-91-7178-646-3 (ISBN)
Disputas
2007-06-11, Oskar Kleins auditorium (FR4), Huvudbyggnaden, AlbaNova, Roslagstullsbacken 21, Stockholm, 10:00
Opponent
Veileder
Merknad
QC 20100630Tilgjengelig fra: 2007-05-31 Laget: 2007-05-31 Sist oppdatert: 2010-06-30bibliografisk kontrollert
2. Matter and damping effects in neutrino mixing and oscillations
Åpne denne publikasjonen i ny fane eller vindu >>Matter and damping effects in neutrino mixing and oscillations
2005 (engelsk)Licentiatavhandling, med artikler (Annet vitenskapelig)
Abstract [en]

This thesis is devoted to the study of neutrino physics in general and the study of neutrino mixing and oscillations in particular. In the standard model of particle physics, neutrinos are massless, and as a result, they do not mix or oscillate. However, many experimental results now seem to give evidence for neutrino oscillations, and thus, the standard model has to be extended in order to incorporate neutrino masses and mixing among different neutrino flavors.

When neutrinos propagate through matter, the neutrino mixing, and thus, also the neutrino oscillations, may be significantly altered. While the matter effects may be easily studied in a framework with only two neutrino flavors and constant matter density, we know that there exists (at least) three neutrino flavors and that the matter density of the Universe is far from constant. This thesis includes studies of three-flavor effects and a solution to the two-flavor neutrino oscillation problem in matter with an arbitrary density profile.

Furthermore, there have historically been attempts to describe the neutrino flavor transitions by other effects than neutrino oscillations. Even if these effects now seem to be disfavored as the leading mechanism, they may still give small corrections to the neutrino oscillation formulas. These effects may lead to erroneous determination of the fundamental neutrino oscillation parameters and are also studied in this thesis in form of damping factors.

sted, utgiver, år, opplag, sider
Stockholm: KTH, 2005. s. x, 57
Serie
Trita-FYS, ISSN 0280-316X ; 2005:21
Emneord
Engineering physics, Neutrino oscillations, neutrino mixing, matter effects, damping effects, the day-night effect, solar neutrinos, Teknisk fysik
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-301 (URN)91-7178-016-5 (ISBN)
Veileder
Merknad
QC 20101124Tilgjengelig fra: 2005-07-15 Laget: 2005-07-15 Sist oppdatert: 2011-12-09bibliografisk kontrollert

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