PIKIMO 12

Session

Evening Session

30 Apr 2022, 16:15

25. Thermal Dark Matter and Primordial Black Holes

Mr Prolay Chanda (University of Illinois Chicago)

30/04/2022, 16:15

It is quite conceivable that cosmology may give rise to appreciable populations of both particle dark matter and primordial black holes (PBH) with the combined mass density providing the observationally inferred value $\Omega_{\rm DM} \approx 0.26$. However, previous studies have highlighted that scenarios with both particle dark matter and PBH are strongly excluded γ-ray limits assuming...

24. The phenomenological cornucopia of SU(3) exotica

Taylor Murphy

30/04/2022, 16:30

We catalog the gauge-invariant interactions of Standard Model particles and new fields in the six-dimensional (sextet, $\boldsymbol{6}$) representation of the SM color gauge group $\mathrm{SU}(3)_{\text{c}}$. We consider effective operators of mass dimension up to seven, featuring both scalar and fermionic color sextets. We use an iterative tensor-product method to identify the color...

12. Underdamped Axionic Blue Isocurvature Perturbations

SAI CHAITANYA TADEPALLI

30/04/2022, 16:45

Previous computations of strongly blue tilted axionic isocurvature spectra were computed in the parametric region in which the lightest time-dependent mass is smaller than the Hubble expansion rate during inflation, leading to an overdamped time evolution. Here we present the strongly blue tilted axionic isocurvature spectrum in an underdamped time evolution parametric regime. Somewhat...

14. Flavored gauge-mediated supersymmetry breaking models with discrete non-Abelian symmetries

SHU TIAN EU

30/04/2022, 17:00

We investigate flavored gauge mediation models in which the Higgs and messenger doublets are embedded in multiplets of the discrete non-Abelian symmetry S3. In these theories, the S3 symmetry correlates the flavor structure of the quark and lepton Yukawa couplings with the structure of the messenger Yukawa couplings that contribute to the soft supersymmetry breaking mass parameters. We provide...

10. Cosmological Constraints on First-Order Phase Transitions

MRUNAL PRASHANT KORWAR

30/04/2022, 17:15

First-order phase transitions exist in many models beyond the Standard Model and can generate detectable stochastic gravitational waves for a strong one. Using the cosmological observables in big bang nucleosynthesis and cosmic microwave background, we derive constraints on the phase transition temperature and strength parameter in a model-independent way. For a strong phase transition, we...