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Continuum photon spectrum from Z1Z1 annihilations in universal extra dimensions
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: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 706, nr 4-5, s. 329-332Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We calculate the continuum photon spectrum from the pair annihilation of a Z1 LKP in non-minimal universal extra dimensions. We find that, due to the preferred annihilation into W+ W- pairs, the continuum flux of collinear photons is relatively small compared to the standard case of the B1 as the LKP. This conclusion applies in particular to the spectral endpoint, where also the additional fermionic contributions are not large enough to increase the flux significantly. When searching for the line signal originating from Z1 Z1 annihilations, this is actually a perfect situation, since the continuum signal can be regarded as background to the smoking gun signature of a peak in the photon flux at an energy that is nearly equal to the mass of the dark matter particle. This signal, in combination with (probably) a non-observation of the continuum signal at lower photon energies, constitutes a perfect handle to probe the hypothesis of the Z1 LKP being the dominant component of the dark matter observed in the Universe.

sted, utgiver, år, opplag, sider
Elsevier B.V. , 2012. Vol. 706, nr 4-5, s. 329-332
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-50386DOI: 10.1016/j.physletb.2011.11.018ISI: 000299756800011Scopus ID: 2-s2.0-84155165683OAI: oai:DiVA.org:kth-50386DiVA, id: diva2:461706
Forskningsfinansiär
Swedish Research Council, 621-2008-4210
Merknad

This is the author’s version of a work that was accepted for publication in Physics Letters B. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Physics Letters B, VOL 706, ISSUE 4-5, (15 November 2011) DOI:10.1016/j.physletb.2011.11.018. QC 20120223  Correction ISI: 000306305000041  Doi: 10.1016/j.physletb.2012.05.059

Tilgjengelig fra: 2012-02-23 Laget: 2011-12-05 Sist oppdatert: 2019-03-08bibliografisk 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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