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Non-standard Hamiltonian effects on neutrino oscillations
KTH, School of Engineering Sciences (SCI), Theoretical Physics.ORCID iD: 0000-0001-5948-9152
KTH, School of Engineering Sciences (SCI), Theoretical Physics, Theoretical Particle Physics.ORCID iD: 0000-0002-3525-8349
School of Natural Sciences, Institute for Advanced Study, Princeton, United States.
2007 (English)In: The European Physical Journal C, ISSN 1434-6044, Vol. 49, no 4, 1023-1039 p.Article in journal (Refereed) Published
Abstract [en]

We investigate non-standard Hamiltonian effects on neutrino oscillations, which are effective additional contributions to the vacuum or matter Hamiltonian. Since these effects can enter in either the flavor or mass basis, we develop an understanding of the difference between these bases representing the underlying theoretical model. In particular, the simplest of these effects are classified as "pure" flavor or mass effects, where the appearance of such a "pure" effect can be quite plausible as a leading non-standard contribution from theoretical models. Compared to earlier studies investigating particular effects, we aim for a top-down classification of a possible "new physics" signature at future long-baseline neutrino oscillation precision experiments. We develop a general framework for such effects with two neutrino flavors and discuss the extension to three neutrino flavors, and we demonstrate the challenges for a neutrino factory to distinguish the theoretical origin of these effects with a numerical example as well. We find how the precision measurements of neutrino oscillation parameters can be altered by non-standard effects alone (not including non-standard interactions in the creation and detection processes) and that the non-standard effects on Hamiltonian level can be distinguished from other non-standard effects (such as neutrino decoherence and decay) if we consider the specific imprint of the effects on the energy spectra of several different oscillation channels at a neutrino factory.

Place, publisher, year, edition, pages
Springer-Verlag / Società Italiana di Fisica , 2007. Vol. 49, no 4, 1023-1039 p.
Keyword [en]
Mass Varying Neutrinos, Matter, Spectroscopy, Golden
National Category
Subatomic Physics
URN: urn:nbn:se:kth:diva-7248DOI: 10.1140/epjc/s10052-006-0177-3ISI: 000244692500011ScopusID: 2-s2.0-33847628889OAI: diva2:12203
Swedish Research Council, 621-2001-1611Swedish Research Council, 621-2002-3577Swedish Research Council, 621- 2005-3588
QC 20100630Available from: 2011-06-17 Created: 2007-05-31 Last updated: 2011-06-17Bibliographically approved
In thesis
1. Theoretical and Phenomenological Studies of Neutrino Physics
Open this publication in new window or tab >>Theoretical and Phenomenological Studies of Neutrino Physics
2007 (English)Doctoral thesis, comprehensive summary (Other scientific)
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.

Place, publisher, year, edition, pages
Stockholm: Teoretisk fysik, 2007. xii, 102, [7] p.
Trita-FYS, ISSN 0280-316X ; 2007:31
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
National Category
Physical Sciences
urn:nbn:se:kth:diva-4415 (URN)978-91-7178-646-3 (ISBN)
Public defence
2007-06-11, Oskar Kleins auditorium (FR4), Huvudbyggnaden, AlbaNova, Roslagstullsbacken 21, Stockholm, 10:00
QC 20100630Available from: 2007-05-31 Created: 2007-05-31 Last updated: 2010-06-30Bibliographically approved

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