Conveners
Dark Matter
- Peter Jonathan Cox (The University of Melbourne)
Dark Matter
- Shyam Balaji (LPTHE)
Dark Matter
- Tarak Nath Maity (University of Sydney)
Capture and annihilation of WIMP-like dark matter in red giant stars can lead to faster-than-expected ignition of the helium core, and thus a lower tip of the red giant branch (TRGB) luminosity. We use Gaia data to place constraints on the dark matter-nucleon cross section using TRGB of 22 globular clusters with measured TRGB luminosities, and place projections on the sensitivity resulting...
It has been suggested for a long time that dark matter would form a density spike around a black hole. However, no promising evidence has been observed so far to verify this theoretical prediction. In this talk, I will report the evidence of showing the existence of a dark matter density spike surrounding each of the two nearby stellar-mass black holes (A0620-00 and XTE J1118+480) and in the...
It has been recently proposed that the boosted dark matter (BDM) by supernova neutrinos (SN$\nu$) from SN1987a or from the next Galactic supernova (SN) can serve as a novel component to probe nonvanishing interaction between dark matter (DM) and the standard model leptons. In this talk, I will introduce the relevant concept and evaluate the present-day diffuse flux of SN$\nu$ BDM originated...
Irrefutable evidences from galaxy rotation curve, gravitational lensing and large scale structure of the Universe suggest that the present Universe is dominantly filled by an invisible matter, popularly called dark matter. In fact, the satellite based experiment PLANCK predicted that the relic density of dark matter, expressed in terms of Ω_Dm h^2=0.12±0.0012. However, the dark matter...
Minimal Flavor Violation (MFV) offers an appealing framework for exploring physics beyond the Standard Model. Interestingly, within the MFV framework, a new colorless field that transforms non-trivially under a global ${\rm SU}(3)^3$ quark flavor group can naturally be stable. Such a new field is thus a promising dark matter candidate, provided it is electrically neutral. We extend the MFV...
We propose a class of dark matter models based on a chiral U(1) gauge symmetry acting on a dark sector. The chiral U(1) protects the masses of the dark sector fermions, and also guarantees the stability of the dark matter particle by virtue of an unbroken discrete Z_N gauge symmetry. We identify 38 such U(1) models which are descendants of a chiral SU(3)×SU(2) gauge symmetry, consisting of a...
We study phenomenology of a light scalar dark matter (DM). In the model, there are an inert doublet scalar and a singlet Dirac fermion ψ, both charged under a global Z_2 symmetry. The mass of the lightest inert scalar H can be lighter than 10 GeV by imposing appropriate relations between three scalar quartic couplings. The lightest Z_2 odd particle is stable and DM. In this paper, focusing on...
The Migdal effect describes the ionization rate of atoms during the scattering of heavy particles off atomic nuclei. It offers a new avenue for the search for dark matter particles with sub-GeV masses in liquid noble gas detectors. We propose a novel mechanism for atomic ionization, involving the complete absorption of dark matter particles upon interaction with atomic nuclei. Unlike inelastic...
