A5101565019- Cosmology and Gravitation Theories
- Black Holes and Theoretical Physics
- Pulsars and Gravitational Waves Research
- Machine Learning in Materials Science
- Computational Physics and Python Applications
- Mathematical Dynamics and Fractals
- Radio Astronomy Observations and Technology
- Quantum, superfluid, helium dynamics
- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Noncommutative and Quantum Gravity Theories
- Advanced NMR Techniques and Applications
- Control and Dynamics of Mobile Robots
- Galaxies: Formation, Evolution, Phenomena
University of Pittsburgh
2024
Korea University
2022
Université Claude Bernard Lyon 1
2017
Centre National de la Recherche Scientifique
2017
We present a measurement of the cross-correlation between MagLim galaxies selected from Dark Energy Survey (DES) first three years observations (Y3) and cosmic microwave background (CMB) lensing Atacama Cosmology Telescope (ACT) Data Release 4 (DR4), reconstructed over $\sim 436$ sq.deg. sky. Our galaxy sample, which covers 4143$ sq.deg., is divided into six redshift bins spanning range $0.20<z<1.05$. adopt blinding procedure until passing all consistency systematics tests. After imposing...
We detailed our discovery of a chiral enhancement in the production cross sections massive spin-2 gravitons, below electroweak symmetry breaking scale, that makes them ideal dark matter candidates for freeze-in mechanism. The result is independent physics at high scales, and points toward masses keV- MeV range. graviton is, therefore, sub-MeV particle, as favored by small scale galaxy structures. apply novel calculation to Randall-Sundrum model with multiple branes, showing significant...
The radion equilibrium in the Randall-Sundrum (RS) model is guaranteed by backreaction of a bulk scalar field. In this paper we study an extended scenario, where intermediate brane exists addition to two branes at fixed points, due discontinuity cosmology constants spatial regions. We conducted complete analysis linearized Einstein's equations after applying Goldberger-Wise mechanism. Our result elucidates that presence nonfixed point under rigid assumption, unique field conjectured as...
A bstract In the warped space model, inter-brane distance can be stabilized by Goldberger-Wise mechanism. Of particular importance, stabilization potential calls for a proper identification of dynamical degree freedom. this paper, we provided complete calculation effective Lagrangian till quadratic order that is generic Randall-Sundrum model and its N -brane ( ≥ 4) extensions. By applying variation principle to specific perturbation field, derived equations motion orthogonal conditions...
In this paper, we study the manifestation of exact diffeomorphism in warped extra dimension, with an emphasis on Randall-Sundrum model. Utilizing covariant form variation $\delta g_{MN} = \nabla_M \xi_N + \nabla_N \xi_M$, derive nonlinear transformation rules for metric fields unitary gauge. As off-shell symmetry, governs interaction structure by connecting neighboring orders bulk action expansions. Our analysis unveils that on-shell exists prior to radion stabilization, but is broken...
We present for the first time nonlinear diffeomorphism in Randall Sundrum model that can keep effective Lagrangian invariant any order of expansion. will show off-shell shapes interaction structure. However radion mass is fact protected by an on-shell diffeomorphism, which be spontaneously broken Goldberger-Wise mechanism. The property also ensures a unique field even extension RS with intermediate branes.