Conveners
Parallel III: Particle-Astrophysics
- Marcelle Soares-Santos (Fermilab)
Parallel III: Dark Matter / Dark Energy
- Celine Boehm (LAPP-Laboratoire d'Annecy-le-Vieux de Physique des Particules ()
Parallel III: Dark Matter / Dark Energy
- Hong Van Nguyen Thi (Institute of Physics, 10 Dao Tan, Ba Dinh, Hanoi)
Cosmic rays have a measured energy spectrum which extends past 100 EeV, with ECM above 100 TeV. Their interactions in the atmosphere thus probe energies past the LHC, but without a controlled experimental environment and with a very low flux.
The Pierre Auger Observatory studies atmospheric cascades, produced by ultra-high energy cosmic rays, with a collecting area of 3000 square...
Direct detection of dark matter in which we can observe not only the recoil energy but also the direction, will be forthcoming generation project. I will discuss the possibility to measure the velocity distribution of dark matter using the directional detections. Especially, it is expected to be efficient to distinguish isotropic distribution models from non-isotropic ones.
I will present recent Sunyaev-Zeldovich observations of clusters of galaxies with the
NIKA prototype at the IRAM 30-m telescope together with the forthcoming
tSZ observation program with the NIKA2 camera.
Axion-like particles (ALPs) can induce localised $\mathcal{O}(10 \%)$ oscillatory modulations in the spectra of photon sources passing through
astrophysical magnetic fields. Ultra-deep Chandra observations of the Perseus cluster contain
over $5 \times 10^5$ counts from the central AGN, NGC1275, and represent a dataset of extraordinary quality for ALP searches.
We use this dataset to search...
Gamma-ray bursts (GRBs) are the most energetic explosion events in the universe.
An amount of gravitational energy of the order of the rest-mass energy of the Sun is
released from a small region within a short time.
This should lead to the formation of a fireball of temperature in the MeV range,
consisting of electrons/positrons, photons, and a small fraction of baryons.
We exploit the...
Nearly 80% of matter in the Universe is dark matter although its nature is as mysterious as its name. By using the dark matter in Inflationary Dark Matter model proposed by P. Q. Hung and P. Frampton, we examine the possibility of the formation of Dark Astronomical Compact Objects (DACOs) along with their physical properties such as masses, radii and their stability. We also propose an energy...
Electroweak multiplets are arguably among the simplest and best motivated WIMP dark matter candidates.
I will discuss their relevant phenomenology in the light of current and future experimental searches. Predictions for searches at the high-luminosity LHC, and at an 100 TeV pp collider will be presented. Then, I will analyze indirect detection probes. I will compare the predictions of the...
The general strategy for dark matter (DM) searches at colliders currently
relies on simplified models, which typically have a limited number of free
parameters. In the case of $t$-channel colored mediators, these simplified
models often have assumptions on the chirality of the DM-SM interactions
with quarks, though generically a UV-complete model with such colored
mediators would lead...
We investigate aspects of axion as a coherently oscillating massive classical scalar field
by analyzing the fully nonlinear order perturbations in Einstein's gravity in the axion-comoving gauge.
The axion fluid has its characteristic pressure term leading to an axion Jeans scale
which is cosmologically negligible for a canonical axion mass.
Our classically derived axion pressure term...
The PandaX dark matter experiment searches WIMP-nucleon scattering signals in the China JinPing Underground Laboratory (CJPL) with a rock burden of 2400 m, employing dual-phase xenon time projection chamber technology. After the completion of PandaX-I, the upgraded experiment, PandaX-II, has been equipped with a 580 kg active xenon target. A commissioning run was carried out in CJPL late in...
In this talk, the present status of the experiment will be presented. A new exculusion limit and sensitivity for A NIT detector with an exposure of 1 kgxyear including directionality information will be presented.
Observations at cosmological and astronomical scales indicate that the majority of matter in our Universe is in the form of non-relativistic and long-lived dark matter. Its observed relic abundance is consistent with the existence of a neutral, massive particle with little or no self-interaction. A dark matter candidate favoured by extensions of the Standard Model is a Weakly Interacting...
The dual light-emitting crystals can reflect the different ranges of nuclear recoils and electron recoils by the ratio of the two different scintillation components. CsI(Na) crystals at temperatures of -160℃ have the best performance in several candidate crystals. An experiment called CINDMS is proposed for WIMPs direct searches based on the CsI(Na) crystals detector by IHEP. The 1T-scale...
The TeV scale WIMP having a weak charge (e.g. Wino, Higgsino) recently attracts many attentions. While such a WIMP is hard to be detected at collider and direct dark matter detection experiments, it is expected to be efficiently searched for at indirect dark matter detection experiments, for its annihilation cross section is boosted by the Sommerfeld enhancement. Among various indirect...
