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Monoenergetic gamma rays from nonminimal Kaluza-Klein dark matter annihilations
KTH, Skolan för teknikvetenskap (SCI), Teoretisk fysik, Teoretisk partikelfysik.
KTH, Skolan för teknikvetenskap (SCI), Teoretisk fysik, Teoretisk partikelfysik.
KTH, Skolan för teknikvetenskap (SCI), Teoretisk fysik, Teoretisk partikelfysik.
KTH, Skolan för teknikvetenskap (SCI), Teoretisk fysik, Teoretisk partikelfysik.ORCID-id: 0000-0002-3525-8349
2012 (engelsk)Inngår i: Physical Review D, ISSN 1550-7998, E-ISSN 1550-2368, Vol. 85, nr 4, s. 043524-Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
The American Physical Society , 2012. Vol. 85, nr 4, s. 043524-
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-50382DOI: 10.1103/PhysRevD.85.043524ISI: 000300571500006Scopus ID: 2-s2.0-84857700861OAI: oai:DiVA.org:kth-50382DiVA, id: diva2:461703
Forskningsfinansiär
Swedish Research Council, 621-2008-4210
Merknad
QC 20111208Tilgjengelig fra: 2012-02-23 Laget: 2011-12-05 Sist oppdatert: 2017-12-08bibliografisk kontrollert
Inngår i avhandling
1. Particle Phenomenology of Compact Extra Dimensions
Åpne denne publikasjonen i ny fane eller vindu >>Particle Phenomenology of Compact Extra Dimensions
2012 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
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.

sted, utgiver, år, opplag, sider
Stockholm: KTH Royal Institute of Technology, 2012. s. xiv, 98
Serie
Trita-FYS, ISSN 0280-316X ; 2012:16
Emneord
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
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-93749 (URN)978-91-7501-305-3 (ISBN)
Disputas
2012-05-11, Sal FB53, Albanova, Roslagstullsbacken 21, Stockholm, 10:00 (engelsk)
Opponent
Veileder
Merknad
QC 20120427Tilgjengelig fra: 2012-04-27 Laget: 2012-04-25 Sist oppdatert: 2012-04-27bibliografisk kontrollert

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