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Matter enhanced neutrino oscillations with a realistic earth density profile
KTH, Tidigare Institutioner, Fysik.ORCID-id: 0000-0002-3525-8349
2000 (Engelska)Ingår i: Modern Physics Letters A, ISSN 0217-7323, E-ISSN 1793-6632, Vol. 15, nr 13, s. 867-874Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

We have investigated matter enhanced neutrino oscillations with a mantle-core-mantle step function and a realistic Earth matter density profile in both a two- and a three-neutrino scenario. We found that the realistic Earth matter density profile can be well approximated with the mantle-core-mantle step function and that there could be an influence on the oscillation channel nu(mu) --> nu(tau) due to resonant enhancement of one of the mixing angles.

Ort, förlag, år, upplaga, sidor
World Scientific Publishing , 2000. Vol. 15, nr 13, s. 867-874
Nyckelord [en]
Atmospheric neutrinos, parametric-resonance, solar, spectroscopy
Nationell ämneskategori
Subatomär fysik
Identifikatorer
URN: urn:nbn:se:kth:diva-13380DOI: 10.1142/S0217732300000864ISI: 000087853200006OAI: oai:DiVA.org:kth-13380DiVA, id: diva2:324754
Anmärkning
QC 20100616Tillgänglig från: 2011-06-22 Skapad: 2010-06-16 Senast uppdaterad: 2017-12-12Bibliografiskt granskad
Ingår i avhandling
1. Dynamics of quarks and leptons: theoretical Studies of Baryons and Neutrinos
Öppna denna publikation i ny flik eller fönster >>Dynamics of quarks and leptons: theoretical Studies of Baryons and Neutrinos
2000 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

The Standard Model of Elementary Particle Physics (SM) is the present theoryfor the elementary particles and their interactions and is a well-established theorywithin the physics community. The SM is a combination of Quantum Chromodynamics(QCD) and the Glashow{Weinberg{Salam (GWS) electroweak model. QCDis a theory for the strong force, whereas the GWS electroweak model is a theoryfor the weak and electromagnetic forces. This means that the SM describes allfundamental forces in Nature, except for the gravitational force. However, the SMis not a nal theory and some of its problems will be discussed in this thesis.In the rst part of this thesis, several properties of baryons are studied suchas spin structure, spin polarizations, magnetic moments, weak form factors, andnucleon quark sea isospin asymmetries, using the chiral quark model (QM). TheQM is an eective chiral eld theory developed to describe low energy phenomena of baryons, since perturbative QCD is not applicable at low energies. The resultsof the QM are in good agreement with experimental data.The second part of the thesis is devoted to the concept of quantum mechanicalneutrino oscillations. Neutrino oscillations can, however, not occur within the GWSelectroweak model. Thus, this model has to be extended in some way. All studiesincluding neutrino oscillation are done within three avor neutrino oscillationmodels. Both vacuum and matter neutrino oscillations are considered. Especially,global ts to all data of candidates for neutrino oscillations are presented and alsoan analytical formalism for matter enhanced three avor neutrino oscillations usingtime evolution operators is derived. Furthermore, investigations of matter eectswhen neutrinos traverse the Earth are included.The thesis begins with an introductory review of the QM and neutrino oscillationsand ends with the research results, which are given in the nine accompanyingscientic articles.

Ort, förlag, år, upplaga, sidor
Stockholm: KTH, 2000. s. xiv, 152
Serie
Trita-FYS, ISSN 0280-316X ; 8045
Nyckelord
Chiral quark model, baryons, conguration mixing, magnetic moments, Coleman{Glashow sum-rule, spin structure, spin polarizations, weak form factors, semileptonic decays, nucleon quark sea isospin asymmetry; neutrinos, neutrino oscillations, neutrino avors, mixing angles, mass squared dierences, MSW eect; numerical calculations, interpretation of experiments
Nationell ämneskategori
Annan fysik
Identifikatorer
urn:nbn:se:kth:diva-2991 (URN)91-7170-537-6 (ISBN)
Disputation
2000-06-09, 00:00
Anmärkning
QC 20100616Tillgänglig från: 2000-06-08 Skapad: 2000-06-08 Senast uppdaterad: 2010-06-16Bibliografiskt granskad

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Förlagets fulltextModern Physics Letters Ahttp://arxiv.org/abs/hep-ph/9909501

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