TDLI-PKU BSM Workshop 2023: Looking to the Sky

Session

Parallel talks (3)

3 Aug 2023, 15:40

Tsung-Dao Lee Institute/N6F-N600 - Lecture Room (Tsung-Dao Lee Institute)

76. Macroscopic Dark Matter Detection with Extreme Mass Ratio Inspirals and mini-EMRIs

Huaike Guo (UCAS)

03/08/2023, 15:40

I will discuss the detection of macroscopic dark matter candidates such as primordial black holes, boson stars, etc, with a special kind of binary system, the extreme mass ratio inspirals, which is a main target for future space-based gravitational wave detectors, and emphasize its advantages in detection of subsolar exotic compact objects. I will also introduce the mini-EMRIs that can be...

77. Dark Conformal Phase Transition and Pulsar Timing Arrays

Sudhakantha Girmohanta (Tsung-Dao Lee Institute and Shanghai Jiao Tong University)

03/08/2023, 16:00

We will explore the possibility that the nano-Hz stochastic gravitational wave background recently reported by several Pulsar Timing Arrays is due to a first-order phase transition of a nearly conformal dark sector, using the dual radion effective potential formalism. The dark radiation from the secluded dark sector can alleviate the Hubble tension without violating the $\Delta N_{\rm eff}$...

68. Z portal to the dark sector through Z′ mediation

Xuhui Jiang (HKUST)

03/08/2023, 16:20

The exotic Z decays to a QCD-like dark sector provide unexplored opportunities at colliders. In this talk, we explore the region where the Z portal is generated by a dark Z′. The phenomenological signatures of light Z' are studied, with both dark shower signals in Z decays and rare decays of B hadrons taken into account.

69. Exploring Ultralight Scalar Assistance in Sterile Neutrino Dark Matter: Cold Spectrum and Unusual X/Gamma-ray Signatures

雨轩 何 (Peking university)

03/08/2023, 16:40

We present a scalar-driven sterile neutrino production model where the interaction with the ultralight scalar field modifies the oscillation production of sterile neutrinos in the early universe. The model effectively suppresses the production of sterile neutrinos at low temperatures due to the heavy scalar mass, resulting in a colder matter power spectrum that avoids constraints from...

72. Searching for Ultralight Dark Matter Conversion in Solar Corona using LOFAR Data

Yan Luo

03/08/2023, 17:00

Ultralight axions and dark photons are well-motivated dark matter (DM) candidates. The axion DM and dark photon DM (DPDM) can resonantly convert into electromagnetic (EM) waves in the solar corona when their mass is equal to the solar plasma frequency. The resultant EM waves are mono-chromatic in the radio-frequency range with an energy equal to the DM mass, which can be detected via radio...