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Neutrinos from Kaluza-Klein dark matter in the Sun
Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), München, Germany.
KTH, Skolan för teknikvetenskap (SCI), Teoretisk fysik, Teoretisk partikelfysik. (Theoretical Particle Physics)
KTH, Skolan för teknikvetenskap (SCI), Teoretisk fysik, Teoretisk partikelfysik.ORCID-id: 0000-0002-3525-8349
2010 (Engelska)Ingår i: Journal of Cosmology and Astroparticle Physics, ISSN 1475-7516, Vol. 2010, nr 01, s. 018-Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

We investigate indirect neutrino signals from annihilations of Kaluza-Klein dark matter in the Sun. Especially, we examine a five- as well as a six-dimensional model, and allow for the possibility that boundary localized terms could affect the spectrum to give different lightest Kaluza-Klein particles, which could constitute the dark matter. The dark matter candidates that are interesting for the purpose of indirect detection of neutrinos are the first Kaluza-Klein mode of the U(1) gauge boson and the neutral component of the SU(2) gauge bosons. Using the DarkSUSY and WimpSim packages, we calculate muon fluxes at an Earth-based neutrino telescope, such as IceCube. For the five-dimensional model, the results hat we obtained agree reasonably well with the results that have previously been presented in the literature, whereas for the six-dimensional model, we find that, at tree-level, the results are the same as for the five-dimensional model. Finally, if the first Kaluza-Klein mode of the U(1) gauge boson constitutes the dark matter, IceCube can constrain the parameter space. However, in the case that the neutral component of the SU(2) gauge bosons is the LKP, the signal is too weak to be observed.

Ort, förlag, år, upplaga, sidor
IOP Publishing / SISSA , 2010. Vol. 2010, nr 01, s. 018-
Nyckelord [en]
dark matter theory, extra dimensions, neutrino astronomy
Nationell ämneskategori
Subatomär fysik
Identifikatorer
URN: urn:nbn:se:kth:diva-31713DOI: 10.1088/1475-7516/2010/01/018ISI: 000289245200008OAI: oai:DiVA.org:kth-31713DiVA, id: diva2:406042
Forskningsfinansiär
Vetenskapsrådet, 623-2007-8066Vetenskapsrådet, 621-2005-3588Vetenskapsrådet, 621-2008-4210
Anmärkning
QC 20110324Tillgänglig från: 2011-06-21 Skapad: 2011-03-24 Senast uppdaterad: 2012-04-27Bibliografiskt granskad
Ingår i avhandling
1. Astrophysical and Collider Signatures of Extra Dimensions
Öppna denna publikation i ny flik eller fönster >>Astrophysical and Collider Signatures of Extra Dimensions
2010 (Engelska)Licentiatavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

In recent years, there has been a large interest in the subject of extra dimensions in particle physics. In particular, a number of models have been suggested which provide solutions to some of the problems with the current Standard Model of particle physics, and which could be tested in the next generation of high-energy experiments. Among the most important of these models are the large extra dimensions model by Arkani-Hamed, Dimopoulos, and Dvali, the universal extra dimensions model, and models allowing right-handed neutrinos to propagate in the extra dimensions. In this thesis, we study phenomenological aspects of these three models, or simple modifications of them.

 

The Arkani-Hamed-Dimopoulos-Dvali model attempts to solve the gauge hierarchy problem through a volume suppression of Newton's gravitational constant, lowering the fundamental Planck scale down to the electroweak scale. However, this solution is unsatisfactory in the sense that it introduces a new scale through the radius of the extra dimensions, which is unnaturally large compared to the electroweak scale. It has been suggested that a similar model, with a hyperbolic internal space, could provide a more satisfactory solution to the problem, and we consider the hadron collider phenomenology of such a model.

 

One of the main features of the universal extra dimensions model is the existence of a potential dark matter candidate, the lightest Kaluza-Klein particle. In the so-called minimal universal extra dimensions model, the identity of this particle is well defined, but in more general models, it could change. We consider the indirect neutrino detection signals for a number of different such dark matter candidates, in a five- as well as a six-dimensional model.

 

Finally, right-handed neutrinos propagating in extra dimensions could provide an alternative scenario to the seesaw mechanism for generating small masses for the left-handed neutrinos. Since extra-dimensional models are non-renormalizable, the Kaluza-Klein tower is expected to be cut off at some high-energy scale. We study a model where a Majorana neutrino at this cutoff scale is responsible for the generation of the light neutrino masses, while the lower modes of the tower could possibly be observed in the Large Hadron Collider. We investigate the bounds on the model from non-unitarity effects, as well as collider signatures of the model.

Ort, förlag, år, upplaga, sidor
Stockholm: KTH Royal Institute of Technology, 2010. s. 68
Serie
Trita-FYS, ISSN 0280-316X ; 2010:05
Nyckelord
Extra-dimensional quantum field theories, universal extra dimensions, Kaluza-Klein dark matter, Arkani-Hamed-Dimopoulos-Dvali model, hierarchy problem, neutrino mass, seesaw mechanism, Large Hadron Collider phenomenology
Nationell ämneskategori
Subatomär fysik
Identifikatorer
urn:nbn:se:kth:diva-11968 (URN)978-91-7415-556-3 (ISBN)
Presentation
2010-02-19, FB53, Albanova, Roslagstullsbacken 21, 106 91 Stockholm, 10:00 (Engelska)
Opponent
Handledare
Anmärkning
QC 20110324Tillgänglig från: 2010-02-05 Skapad: 2010-02-02 Senast uppdaterad: 2011-03-24Bibliografiskt granskad
2. Particle Phenomenology of Compact Extra Dimensions
Öppna denna publikation i ny flik eller fönster >>Particle Phenomenology of Compact Extra Dimensions
2012 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

This thesis is an investigation of the subject of extra dimensions in particle physics. In recent years, there has been a large interest in this subject. In particular, a number of models have been suggested that provide solutions to some of the problem with the current Standard Model of particle physics. These models typically give rise to experimental signatures around the TeV energy scale, which means that they could be tested in the next generation of high-energy experiments, such as the LHC. Among the most important of these models are the universal extra dimensions model, the large extra dimensions model by Arkani-Hamed, Dimopolous, and Dvali, and models where right-handed neutrinos propagate in the extra dimensions.

In the thesis, we study phenomenological aspects of these models, or simple modifications of them. In particular, we focus on Kaluza–Klein dark matter in universal extra dimensions models, different aspects of neutrino physics in higher dimensions, and collider phenomenology of extra dimensions. In addition, we consider consequences of the enhanced renormalization group running of physical parameters in higher-dimensional models.

Ort, förlag, år, upplaga, sidor
Stockholm: KTH Royal Institute of Technology, 2012. s. xiv, 98
Serie
Trita-FYS, ISSN 0280-316X ; 2012:16
Nyckelord
Higher-dimensional quantum field theories, universal extra dimensions, Arkani-Hamed–Dimopolous–Dvali (ADD) model, hierarchy problem, Kaluza– Klein dark matter, neutrino mass, seesaw mechanism, leptonic mixing, renormalization group running, collider phenomenology, Large Hadron Collider
Nationell ämneskategori
Subatomär fysik
Identifikatorer
urn:nbn:se:kth:diva-93749 (URN)978-91-7501-305-3 (ISBN)
Disputation
2012-05-11, Sal FB53, Albanova, Roslagstullsbacken 21, Stockholm, 10:00 (Engelska)
Opponent
Handledare
Anmärkning
QC 20120427Tillgänglig från: 2012-04-27 Skapad: 2012-04-25 Senast uppdaterad: 2012-04-27Bibliografiskt granskad

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