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Event rates for dark matter detectors in neutralino--nucleus scattering are studied for supergravity unified models, including the constraint arising from the $b\rightarrow s\gamma$ experiment. The recent experimental measurement of this…

High Energy Physics - Phenomenology · Physics 2009-09-25 Pran Nath , R. Arnowitt

We investigate the relic abundance of asymmetric Dark Matter particles that were in thermal equilibrium in the early universe. The standard analytic calculation of the symmetric Dark Matter is generalized to the asymmetric case. We…

High Energy Physics - Phenomenology · Physics 2015-05-28 Hoernisa Iminniyaz , Manuel Drees , Xuelei Chen

DarkSUSY is a versatile tool for precision calculations of a large variety of dark matter-related signals, ranging from predictions for the dark matter relic density to dark matter self-interactions and rates relevant for direct and…

High Energy Physics - Phenomenology · Physics 2022-03-16 Torsten Bringmann , Joakim Edsjö

In these Lectures I review possible constraints on particle physics models, obtained by means of combining the results of collider measurements with astrophysical data. I emphasize the theoretical-model dependence of these results. I…

High Energy Physics - Phenomenology · Physics 2017-08-23 Nikolaos E. Mavromatos

Extragalactic and galactic cosmic rays scatter with the cosmic neutrino background during propagation to Earth, yielding a flux of relic neutrinos boosted to larger energies. If an overdensity of relic neutrinos is present in galaxies, and…

High Energy Physics - Phenomenology · Physics 2024-09-24 Mar Císcar-Monsalvatje , Gonzalo Herrera , Ian M. Shoemaker

The theoretical expectations for the supersymmetric particle spectrum is reviewed and a brief overview on present constraints on supersymmetric models from collider experiments is presented. Finally, we discuss the discovery potential of…

High Energy Physics - Phenomenology · Physics 2007-05-23 Ralf Hempfling

We explore the relic density of dark matter and the particle spectrum within a constrained version of an $E_6$ inspired SUSY model with an extra $U(1)_N$ gauge symmetry. In this model a single exact custodial symmetry forbids tree-level…

High Energy Physics - Phenomenology · Physics 2016-06-24 P. Athron , D. Harries , R. Nevzorov , A. G. Williams

One of the key motivations for supersymmetry is that it provides a natural candidate for dark matter. For a long time the density of this candidate particle fell within cosmological bounds across much of the SUSY parameter space. However…

High Energy Physics - Phenomenology · Physics 2007-06-04 J. P. Roberts

We examine various predictions of the minimal supersymmetric standard model coupled to minimal supergravity. The model is characterised by a small set of parameters at the unification scale. The supersymmetric particle spectrum at low…

High Energy Physics - Phenomenology · Physics 2009-10-22 R. G. Roberts , L. Roszkowski

We investigate the relic abundance of dark matter from coannihilation in non-standard cosmological scenarios. We explore the effect of coannihilation on the relic density of dark matter and freeze out temperature in quintessence model with…

High Energy Physics - Phenomenology · Physics 2024-02-13 Fangyu Liu , Hoernisa Iminniyaz

The standard model of cosmology predicts the existence of cosmic neutrino background in the present Universe. To detect cosmic relic neutrinos in the vicinity of the Earth, it is necessary to evaluate the gravitational clustering effects on…

Cosmology and Nongalactic Astrophysics · Physics 2018-05-10 Jue Zhang , Xin Zhang

Terascale supersymmetry has the potential to provide a natural explanation of the dominant dark matter component of the standard lambda-CDM cosmology. However once we impose the constraints on minimal supersymmetry parameters from current…

High Energy Physics - Phenomenology · Physics 2009-11-11 Gabriela Barenboim , Joseph Lykken

The large value of the tensor-to-scalar ratio in the cosmic microwave background radiation reported by the BICEP2 collaboration gives strong impact on models of supersymmetry (SUSY). The large ratio indicates inflation with a high-energy…

High Energy Physics - Phenomenology · Physics 2015-06-19 Keisuke Harigaya , Masahiro Ibe , Koji Ichikawa , Kunio Kaneta , Shigeki Matsumoto

We extend the commonly used mSUGRA framework to allow complex soft terms. We show how these phases can induce large changes of the SUSY threshold corrections to the b quark mass and affect the neutralino relic density predictions of the…

High Energy Physics - Phenomenology · Physics 2016-11-03 Mario E. Gomez , Tarek Ibrahim , Pran Nath , Solveig Skadhauge

In supersymmetric models with gravity-mediated SUSY breaking and gaugino mass unification, the predicted relic abundance of neutralinos usually exceeds the strict limits imposed by the WMAP collaboration. One way to obtain the correct relic…

High Energy Physics - Phenomenology · Physics 2010-02-03 Howard Baer , Azar Mustafayev , Eun-Kyung Park , Stefano Profumo

In this talk we investigate the dark matter prospects for supersymmetric models with non-universal gaugino masses. We motivate the use of non-universal gaugino masses from several directions, including problems with the current favorite…

High Energy Physics - Phenomenology · Physics 2014-11-17 Andreas Birkedal-Hansen

The cosmological relic density of the lightest supersymmetric particle (LSP) of type I string derived model is calculated. This model can accommodate large values of CP violating phases, and the electron and neutron electric dipole moments…

High Energy Physics - Phenomenology · Physics 2009-10-31 Shaaban Khalil

We survey strategies generally employed for SUSY discovery at colliders and then discuss how these may have to be altered for SUSY searches at the Tevatron if $\tan\beta$ is large. We also discuss the reach of the Tevatron and the LHC in…

High Energy Physics - Phenomenology · Physics 2007-05-23 Xerxes Tata

Non-universal boundary conditions in grand unified theories can lead to non-universal gaugino masses at the unification scale. In R-parity preserving theories the lightest supersymmetric particle is a natural candidate for the dark matter.…

High Energy Physics - Phenomenology · Physics 2009-02-02 Katri Huitu , Jari Laamanen

An analysis of the $b \rightarrow s\gamma$ is given in supergravity grand unification using the framework of the radiative breaking of the electro-weak symmetry under three separate sets of constraints:1) neutralino relic density does not…

High Energy Physics - Phenomenology · Physics 2009-09-25 Pran Nath , R. Arnowitt
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