A5004573716- Particle physics theoretical and experimental studies
- Cosmology and Gravitation Theories
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Particle Detector Development and Performance
- Pulsars and Gravitational Waves Research
- Computational Physics and Python Applications
- Atomic and Subatomic Physics Research
- Astrophysics and Cosmic Phenomena
- Noncommutative and Quantum Gravity Theories
- Geophysics and Gravity Measurements
- Quantum Mechanics and Applications
- Radio Astronomy Observations and Technology
- Galaxies: Formation, Evolution, Phenomena
- Topological Materials and Phenomena
- Cold Atom Physics and Bose-Einstein Condensates
- Superconducting Materials and Applications
- Particle Accelerators and Free-Electron Lasers
- Relativity and Gravitational Theory
- Astrophysical Phenomena and Observations
- Particle accelerators and beam dynamics
- Quantum, superfluid, helium dynamics
- Experimental and Theoretical Physics Studies
Beijing Institute of Technology
2020-2024
Sapienza University of Rome
2019-2022
Hong Kong University of Science and Technology
2016-2020
University of Hong Kong
2016-2020
National Taiwan University
2018-2020
Ludwig-Maximilians-Universität München
2015-2020
High Energy Accelerator Research Organization
2014-2019
National Center for Theoretical Sciences
2018-2019
Hong Kong Jockey Club
2016-2017
Harvard University
2017
Abstract The first direct measurement of gravitational waves by the LIGO and Virgo collaborations has opened up new avenues to explore our Universe. This white paper outlines challenges gains expected in gravitational-wave searches at frequencies above LIGO/Virgo band, with a particular focus on Ultra High-Frequency Gravitational Waves (UHF-GWs), covering MHz GHz range. absence known astrophysical sources this frequency range provides unique opportunity discover physics beyond Standard Model...
We revisit a class of Z' explanations the anomalies found by LHCb collaboration in $B$ decays, and show that scenario is tightly constrained combination constraints: (i) LHC searches for di-muon resonances, (ii) pertubativity couplings; (iii) $B_s$ mass difference, (iv) electro-weak precision data. Solutions are suppressing coupling to electrons light quarks and/or allowing decay width into dark matter. also present simplified framework where TeV-scale gauge boson couples standard leptons as...
We develop a graphical method for computing the virial expansion coefficients nonrelativistic quantum field theory. As an example we compute third coefficient b3 unitary fermions, nonperturbative system. By calculating several graphs and performing extrapolation, arrive at b3=-0.2930, within 0.7% of recent computation b3=-0.290 952 95 by Liu, Hu, Drummond, which involved summing 10,000 energy levels three fermions in harmonic trap.
We suggest a mechanism whereby the three generations of quarks and leptons correspond to surface modes in five-dimensional theory. These arise from nonlinear fermion dispersion relation extra dimension, much same manner as topological insulator or lattice implementation domain wall fermions. also show that properties can persist deconstructed version model four dimensions.
We study the possibility of a heavy scalar or pseudoscalar in TeV-scale beyond Standard Model scenarios being inflaton early universe light recent $\mathcal{O}(750)\text{ }\text{ }\mathrm{GeV}$ diphoton excess at LHC. consider scenario which new couples to gauge bosons loop level through massive charged vectorlike fermions with without dark fermions. calculate renormalization group running both and couplings, present two different models that are perturbative, stabilized vacuum up near...
The coherent oscillation of ultralight dark matter in the mass regime around ${10}^{\ensuremath{-}23}\text{ }\text{ }\mathrm{eV}$ induces changes gravitational potential with frequency nanohertz range. This effect is known to produce a monochromatic signal pulsar timing residuals. Here we discuss multifield scenario that produces wide spectrum frequencies, such particle can mimic stochastic common process. We how various spins band on residuals and perform Bayesian analysis constrain...
We examine the thin accretion disk behaviors surrounding black holes embedded in cold dark matter halos and scalar field halos. first calculate event horizons derive equations of motion effective potential hole geometries with different then compute specific energy, angular momentum, velocity particles moving along circular orbits. also potentials to find locations innermost stable orbit (ISCO) compare them Schwarzschild Kerr without use observed ISCO supermassive at Galactic Center Milky...
We explore the potential for discovery of triple-Higgs signal in $2b2l^{\pm}4j+E\!\!\!/$ decay channel at a $100$ TeV hadron collider. consider both Standard Model and generic new-physics contributions, described by an effective Lagrangian that includes higher-dimensional operators. The selected subset operators is motivated composite-Higgs Higgs-inflation models. In Model, we perform parton-level detector-level analysis. Although results are encouraging, demonstrate this mode will be really...
We study multi-Higgs final states in vector boson fusion (VBF) processes at the LHC and future proton-proton colliders, focusing on prospects for measurements 27 100 TeV. use an effective Lagrangian which includes higher-dimensional operators mass eigenstates are relevant to VBF relate this specific parametrizations models new physics Higgs sector. derive theoretical constraints parameter space from unitarity of $2\ensuremath{\rightarrow}n$ scattering amplitudes apply results...
We consider a model of sub-GeV dark matter whose interaction with the Standard Model is mediated by new vector boson (the photon) which couples kinetically to photon. describe possibility constraining such using superfluid He-4 detector, means an effective theory for description phonon. find that detector could provide bounds are competitive other direct detection experiments only ultralight mediator, in agreement previous studies. As byproduct we also present, first time, low-energy field...
Several pulsar timing array (PTA) experiments such as NANOGrav and PPTA reported evidence of a gravitational wave background at the nano-Hz frequency band recently. This signal can originate from scalar-induced waves (SIGW) generated by enhanced curvature perturbation. Here we perform joint likelihood inference on PTA datasets, our results show that if signals were indeed SIGW origin, perturbations amplitude required will produce primordial black holes (PBHs) in $[2 \times 10^{-5}, 2...
Motivated by the recent rare $B$ decays measurements, we study matching procedure of operators ${O}_{9}$, ${O}_{10}$ in low energy effective Hamiltonian and Standard Model theory (SMEFT). It is noticed that there are more related SMEFT whose coefficients cannot be determined only from low-energy data physics. We demonstrate how to determine these with some new physics models, like ${Z}^{\ensuremath{'}}$ model leptoquark then consider probe at high using process...
Cosmological phase transitions (CPTs), such as the Grand Unified Theory (GUT) and electroweak (EW) ones, play a significant role in both particle physics cosmology. In this letter, we propose to probe first-order CPTs, by detecting gravitational waves (GWs) which are generated during through cosmic microwave background (CMB). If happened around inflation era, CPTs may yield low-frequency GWs due bubble dynamics, leaving imprints on CMB. contrast nearly scale-invariant primordial caused...
The oscillating light axion field is known as wave dark matter. We propose an LC (inductor-capacitor)-resonance enhanced detection of the narrow band electric signals induced by matter using a solenoid magnet facility. provide full 3D electromagnetic simulation results for signal field. high $Q$-factor resonant circuit and then amplified detected state-of-the-art cryogenic electrical transport measurement technique. amplifier noise dominant source in proposed system. estimate that system can...
We examine the defect gauge theory on two perpendicular D3-branes with a 1+1 dimensional intersection, consisting of U(1) fields and charged hypermultiplets intersection. argue that this must have magnetically soliton corresponding to D-string stretched between branes. show actually source magnetic as well electric fields. The charges are confined if hypermultiplet action is canonical, but considerations periodicity space in string imply nontrivial Gibbons-Hawking metric, we there then...
We explore the possibility of detecting entangled photon pairs from cosmic microwave background or other cosmological sources coming two patches sky. The measurements use detectors with different polarizer directions. When are separated by a large angle relative to earth, such that each detector has only one source in its field view, null test unentangled photons can be performed. deviation this is, principle, signature entanglement. To confirm whether is consistent photons, we derive...
The axion objects such as mini-clusters and clouds around spinning black holes induce parametric resonances of electromagnetic waves through the axion-photon interaction. In particular, it has been known that from with mass $10^{-6}$eV may explain observed fast radio bursts (FRBs). Here we argue similar high frequency gravitational waves, which call wave (FGBs), are generated clumps presence Chern-Simons (CS) coupling. typical is half mass, in general can range kHz to GHz. We also discuss...
Gravitational waves can generate electromagnetic effects inside a strong electric or magnetic field within the Standard Model and general relativity. Here we propose using quarterly split cavity LC (inductor capacitor) resonance circuit to detect high-frequency gravitational wave from 0.1 MHz GHz. We perform full 3D simulation of cavity's signal for sensitivity estimate. Our depends on coherence timescale sources volume size cavity. discuss resonant measurement schemes narrow-band also...
Abstract We consider a scenario with axions/axion-like particles Chern–Simons gravity coupling, such that gravitational waves can be produced directly from axion wave parametric resonance in the early universe after inflation. This term is less constrained compared to well-searched photon coupling and provide direct efficient production channel for waves. Such stochastic detected by either space/ground-based detectors or pulsar timing arrays broad range of masses decay constants.