A5059223372- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Cosmology and Gravitation Theories
- Atomic and Subatomic Physics Research
- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- High-Energy Particle Collisions Research
- Galaxies: Formation, Evolution, Phenomena
- Black Holes and Theoretical Physics
- Particle Detector Development and Performance
- Scientific Research and Discoveries
- Quantum Chromodynamics and Particle Interactions
- Pulsars and Gravitational Waves Research
- Superconducting and THz Device Technology
- Quantum, superfluid, helium dynamics
- Gas Dynamics and Kinetic Theory
- Radio Astronomy Observations and Technology
- Astronomy and Astrophysical Research
- Advanced Thermodynamics and Statistical Mechanics
- Age of Information Optimization
- Advanced Differential Geometry Research
- Astrophysical Phenomena and Observations
- Advanced NMR Techniques and Applications
- Radiation Therapy and Dosimetry
- Game Theory and Applications
Sogang University
2015-2024
ProQuest (United States)
2022
Seoul National University
2009-2010
Korea Institute for Advanced Study
2005-2009
Netherlands Institute for Radio Astronomy
2009
Istituto Nazionale di Fisica Nucleare
2003-2005
Istituto Nazionale di Fisica Nucleare, Sezione di Torino
1992-2004
University of Turin
2001-2004
Universidad de Zaragoza
1997-2003
Institute for Nuclear Research
2000
Abstract We discuss the sensitivity of bounds on spin-independent (SI) and spin-dependent (SD) WIMP-proton WIMP-neutron interaction couplings α SI,SD p,n WIMP velocity distribution for a massless mediator. update in Standard Halo Model (SHM) direct detection neutrino signal from annihilation Sun (fixing channel to bb̅ ), set halo-independent bound first time using single-stream method. In case mediator SHM capture rate diverges is regularized by removing contribution WIMPs locked into orbits...
Abstract We use the Migdal effect to extend low masses bounds on each of effective couplings non-relativistic field theory a WIMP mass m χ and spin 1/2 that interacts inelastically with nuclei by either upscattering heavier state splitting δ > 0 or downscattering lighter < 0. In order do so we perform systematic analysis in - parameter space comparing them those from nuclear recoil searches. The allows significantly for this case are driven XENON1T, except when is vanishing very small,...
The long-standing model-independent annual modulation effect measured by the DAMA Collaboration, which fulfills all requirements of a dark matter signature, and new result CoGeNT experiment that shows similar behavior are comparatively examined under hypothesis candidate particle interacting with detectors' nuclei coherent elastic process. ensuing physical regions in plane matter-particle mass versus nucleon cross-section derived for various galactic halo models taking into account impact...
The DAMA-NaI Collaboration has observed a $4\ensuremath{\sigma}$ C.L. model-independent effect investigating the annual modulation signature in counting rate of an NaI(Tl) setup (total exposure 57986 kg day) and implications this have been studied under different model-dependent assumptions. In paper we extend one previous analyses, case WIMP with purely spin-independent coupling, by discussing detail on results uncertainties dark matter galactic velocity distribution. We study systematic...
The relic abundance and the scalar cross section off nucleon for light neutralinos (of mass below about 45 GeV) are evaluated in an effective MSSM model without GUT-inspired relations among gaugino masses. It is shown that these may provide a sizable contribution to matter density Universe produce measurable effects WIMP direct detection experiments. These properties elucidated terms of simple analytical arguments.
The predictions of our previous analyses about possible low-mass (lower than 50 GeV) relic neutralinos are discussed in the light most recent results from WIMP direct detection experiments. It is proved that these quite compatible with new annual-modulation data DAMA Collaboration; theoretical also compared upper bounds CDMS and EDELWEISS Collaborations.
We discuss to what extent the present experiments of direct search for weakly interacting massive particles (WIMPs), when interpreted in terms relic neutralinos, probe interesting regions supersymmetric parameter space, which are also being progressively explored at accelerators. Our analysis is performed a number different schemes. derive relevant neutralino cosmological properties, locally and on average universe. prove that part (SUSY) configurations probed by current WIMP entails...
In the framework of an effective minimal supersymmetric extension standard model without gaugino-mass unification at a grand scale, we set lower bound on neutralino mass based new WMAP data ${\ensuremath{\Omega}}_{\mathrm{CDM}}$ $(R$-parity conservation is assumed). Our ${m}_{\ensuremath{\chi}}\ensuremath{\gtrsim}6\mathrm{GeV}$ leaves much room for relic neutralinos significantly lighter than those commonly considered ${(m}_{\ensuremath{\chi}}\ensuremath{\gtrsim}50\mathrm{GeV}).$ We prove...
Neutralino dark matter is studied in the context of a supergravity scheme where soft scalar mass terms are not constrained by universality conditions at grand unification scale. We analyse detail consequences relaxation this assumption on supersymmetric parameter space, neutralino relic abundance and event rate for direct detection neutralinos.
We discuss the gamma-ray signal from dark matter annihilation in our Galaxy and external objects, namely, Large Magellanic Cloud, Andromeda (M31), M87. derive predictions for fluxes a low energy realization of minimal supersymmetric standard model compare them with current data EGRET, CANGAROO-II, HEGRA capabilities new-generation satellite-borne experiments, like GLAST, ground-based \ifmmode \check{C}\else \v{C}\fi{}erenkov telescopes, VERITAS. find below level required to explain possible...
The most recent results from direct searches for dark matter particles in the galactic halo are examined terms of an effective Minimal Supersymmetric extension Standard Model at electroweak scale without gaugino masses unification. We show that annual modulation effect 8.2 $σ$ C.L. recently presented by DAMA Collaboration, as result a combined analysis DAMA/NaI and DAMA/LIBRA experiments total exposure 0.82 ton yr, fits remarkably well with what expected relic neutralinos wide variety WIMP...
The original annual-modulation region, singled out by the DAMA-NaI experiment for direct detection of WIMPs, is extended taking into account uncertainties in galactic astrophysical velocities. Also effect due to a possible bulk rotation dark matter halo considered. We find that range WIMP mass becomes 30 $\mathrm{GeV}\ensuremath{\lesssim}{m}_{\ensuremath{\chi}}\ensuremath{\lesssim}130$ GeV at 1\ensuremath{\sigma} C.L. with further extension upper bound, when taken account. show DAMA results,...
We examine the status of light neutralinos in an effective minimal supersymmetric extension standard model at electroweak scale which was considered past and discussed terms available data direct searches for dark matter particles. Our reanalysis is prompted by new measurements Tevatron $B$ factories might potentially provide significant constraints on model. Here we detail all these show that present published results from have only a mild effect original light-neutralino population. This...
We examine indirect signals produced by neutralino self-annihilations, in the galactic halo or inside celestial bodies, frame of an effective MSSM model without gaugino-mass unification at a grand scale. compare our theoretical predictions with current experimental data gamma-rays and antiprotons space upgoing muons neutrino telescopes. Results are presented for wide range mass, though discussions focused on light neutralinos. find that only antiproton signal is potentially able to set...
Since the thermal history of universe is unknown before epoch primordial nucleosynthesis, largest temperature radiation-dominated phase (the reheating temperature) might have been as low 1 MeV. We perform a quantitative study supersymmetric dark matter relic abundance in cosmological scenarios with temperature. show that, for values smaller than about 30 GeV, domains supergravity parameter space which are compatible hypothesis that composed neutralinos largely enhanced. also find lower bound...
The CDMS Collaboration has presented its results for the final exposure of II experiment and reports that two candidate events dark matter would survive after application various discrimination subtraction procedures inherent in their analysis. We show a population relic neutralinos, which was already proved to fit DAMA/LIBRA data on annual-modulation effect, could naturally also explain events, if these are actually due signal.
We review the status of phenomenology light neutralinos in an effective Minimal Supersymmetric extension Standard Model (MSSM) at electroweak scale, new results obtained CERN Large Hadron Collider. First we consider impact data by CMS Collaboration on search for Higgs boson decay into a tau pair, and LHCb Collaborations branching ratio $B_s \rightarrow {\mu}^{+} + {\mu}^{-}$. Then examine possible implications excess events found ATLAS SM--like around mass 126 GeV, with most likely region...