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Monoenergetic gamma rays from nonminimal Kaluza-Klein dark matter annihilations
KTH, School of Engineering Sciences (SCI), Theoretical Physics, Theoretical Particle Physics.
KTH, School of Engineering Sciences (SCI), Theoretical Physics, Theoretical Particle Physics.
KTH, School of Engineering Sciences (SCI), Theoretical Physics, Theoretical Particle Physics.
KTH, School of Engineering Sciences (SCI), Theoretical Physics, Theoretical Particle Physics.ORCID iD: 0000-0002-3525-8349
2012 (English)In: Physical Review D, ISSN 1550-7998, Vol. 85, no 4, 043524- p.Article in journal (Refereed) Published
Abstract [en]

We investigate monoenergetic gamma-ray signatures from annihilations of dark matter comprised of Z(1), the first Kaluza-Klein (KK) excitation of the Z boson in a nonminimal universal extra dimensions (UED) model. The self interactions of the non-Abelian Z(1) gauge boson give rise to a large number of contributing Feynman diagrams that do not exist for annihilations of the Abelian gauge boson B-1, which is the standard Kaluza-Klein dark matter (KKDM) candidate. We find that the annihilation rate is indeed considerably larger for the Z(1) than for the B-1. Even though relic density calculations indicate that the mass of the Z(1) should be larger than the mass of the B-1, the predicted monoenergetic gamma fluxes are of the same order of magnitude. We compare our results to existing experimental limits, as well as to future sensitivities, for image air Cherenkov telescopes, and we find that the limits are reached already with a moderately large boost factor. The realistic prospects for detection depend on the experimental energy resolution.

Place, publisher, year, edition, pages
The American Physical Society , 2012. Vol. 85, no 4, 043524- p.
National Category
Astronomy, Astrophysics and Cosmology
URN: urn:nbn:se:kth:diva-50382DOI: 10.1103/PhysRevD.85.043524ISI: 000300571500006ScopusID: 2-s2.0-84857700861OAI: diva2:461703
Swedish Research Council, 621-2008-4210
QC 20111208Available from: 2012-02-23 Created: 2011-12-05 Last updated: 2012-04-27Bibliographically approved
In thesis
1. Particle Phenomenology of Compact Extra Dimensions
Open this publication in new window or tab >>Particle Phenomenology of Compact Extra Dimensions
2012 (English)Doctoral thesis, comprehensive summary (Other academic)
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.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2012. xiv, 98 p.
Trita-FYS, ISSN 0280-316X ; 2012:16
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
National Category
Subatomic Physics
urn:nbn:se:kth:diva-93749 (URN)978-91-7501-305-3 (ISBN)
Public defence
2012-05-11, Sal FB53, Albanova, Roslagstullsbacken 21, Stockholm, 10:00 (English)
QC 20120427Available from: 2012-04-27 Created: 2012-04-25 Last updated: 2012-04-27Bibliographically approved

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