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Prospects for higgsino-singlino dark matter detection at IceCube and PINGU
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics. (Theoretical high energy physics)ORCID iD: 0000-0003-0452-0671
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics. Asia Pacific Center for Theoretical Physics, Pohang, South Korea. (Theoretical high energy physics)
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics. (Theoretical high energy physics)
2015 (English)Article in journal (Refereed) Submitted
Abstract [en]

We study neutralino dark matter (DM) with large singlino fractions in the next-to-minimal supersymmetric Standard Model (NMSSM). We perform a detailed analysis of the parameter space regions of the model that yield such DM while satisfying the constraints from the Higgs boson searches at the Large Electron Proton (LEP) collider and the Large Hadron Collider (LHC) as well as from b-physics experiments. We find that this DM can yield a thermal relic density consistent with the Planck measurement in mass regions where the lightest neutralino of the minimal supersymmetric Standard Model (MSSM) generally cannot. This is particularly true for lighter DM masses, either less than 10 GeV or between 60 -100 GeV, and for heavier DM masses, between 500 - 1000 GeV. We then analyse the prospects for indirect detection of such DM at the IceCube neutrino telescope, assuming the complete 86-string configuration including DeepCore. We also consider the added sensitivity to low-mass DM with the proposed PINGU extension. We find that IceCube is sensitive to some regions of the NMSSM parameter space containing singlino-dominated DM and that a subset of such model points are already ruled out by the IceCube one-year data. IceCube will also be sensitive to some parameter space regions that will not be probed by the upcoming ton-scale direct detection experiments.

Place, publisher, year, edition, pages
2015.
Keyword [en]
Dark matter, supersymmetry, IceCube experiment, neutrino telescope, singlino, higgsino
National Category
Subatomic Physics Astronomy, Astrophysics and Cosmology
Research subject
Physics with specialization in Elementary Particle Physics
Identifiers
URN: urn:nbn:se:uu:diva-256039OAI: oai:DiVA.org:uu-256039DiVA: diva2:824386
Funder
Swedish Research Council, 2007-4071Swedish Research Council, 621- 2011-5107Swedish Research Council, 621-2011-5109Swedish National Infrastructure for Computing (SNIC), SNIC 2014/1-5Swedish National Infrastructure for Computing (SNIC), p2013257
Available from: 2015-06-22 Created: 2015-06-22 Last updated: 2016-01-13
In thesis
1. Color Screening in QCD and Neutrinos from Singlino Dark Matter
Open this publication in new window or tab >>Color Screening in QCD and Neutrinos from Singlino Dark Matter
2015 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Hard diffraction in proton collisions, where the initial state proton emerges from the interaction rather undisturbed despite a hard interaction scale, has been studied for a few decades. First observed in proton-proton collisions, the phenomenon is seen as well in deep inelastic electron-proton scattering (DIS) as a leading final state proton and a rapidity gap-region without final state particles. Although a rather successful description in terms of the exchange of a hadronic color singlet pomeron with a parameterized gluon content exists, it is still an open question whether a theoretically more well-founded description can be obtained based on quantum chromodynamics. The soft color interaction model (SCI) attempts this through additional gluon exchanges at momentum scales below the conventional scale of perturbative QCD and the hadronization scale. Such gluons can lead to an effective color singlet exchange and therefore to diffraction. This thesis explores the phenomenology of the SCI model in diffractive W and photon+jet production. For diffractive deep inelastic scattering, a dynamic color screening model is developed based on a summed amplitude for soft gluon exchanges. The studies of the model within Monte Carlo event simulation show that the additional dynamics improve the description of electron-positron scattering data from HERA.

Dijet events in proton-proton collisions with an upper limit on the energy flow between the jets is sensitive to large angle gluon emissions. This thesis applies a resummation method which takes into account also secondary emissions to describe this observable and shows that a good description of data from ATLAS can be achieved.

Supersymmetric extensions to the Standard Model provide a possible explanation for dark matter in the universe. The next-to-minimal supersymmetric extension (NMSSM) can contain a dark matter candidate in form of the lightest neutralino with a substantial singlino component. This thesis studies the prospects for indirect detection of dark matter for such viable NMSSM model points via the observation of neutrinos from neutralino annihilation in the sun with IceCube and the future extension PINGU. It is shown that with a few years of data taking large parts of the parameter space can be excluded or a discovery be made.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2015. 62 p.
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 1321
Keyword
QCD, Diffraction, SCI, Dark Matter, Singlino, NMSSM, Indirect Detection
National Category
Physical Sciences
Research subject
Physics with specialization in Elementary Particle Physics
Identifiers
urn:nbn:se:uu:diva-267310 (URN)978-91-554-9417-9 (ISBN)
Public defence
2016-01-20, 80101, Ångströmlaboratoriet, Lägerhyddsvägen 1, Uppsala, 13:15 (English)
Opponent
Supervisors
Available from: 2015-12-16 Created: 2015-11-20 Last updated: 2016-01-13

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arXiv:1506.05714

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Enberg, RikardMunir, ShoaibPerez de los Heros, CarlosWerder, Dominik

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