A5007882925- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- Particle Detector Development and Performance
- Pulsars and Gravitational Waves Research
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Black Holes and Theoretical Physics
- Galaxies: Formation, Evolution, Phenomena
- Computational Physics and Python Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Radio Astronomy Observations and Technology
- Advanced Frequency and Time Standards
- Nuclear Physics and Applications
- Radiation Therapy and Dosimetry
- Geophysics and Gravity Measurements
- Quantum, superfluid, helium dynamics
- Superconducting and THz Device Technology
- Scientific Research and Discoveries
- Stochastic processes and financial applications
- Particle accelerators and beam dynamics
University of California, Riverside
2016-2024
Nanjing Foreign Language School
2024
Perimeter Institute
2014-2017
University of Maryland, College Park
2013-2016
Harvard University
2009-2012
University of Houston
2007-2012
Harvard University Press
2010-2011
Andrews University
2005-2009
York University
2005-2009
University of Michigan–Ann Arbor
2006-2009
Abstract We propose in this White Paper a concept for space experiment using cold atoms to search ultra-light dark matter, and detect gravitational waves the frequency range between most sensitive ranges of LISA terrestrial LIGO/Virgo/KAGRA/INDIGO experiments. This interdisciplinary experiment, called Atomic Experiment Dark Matter Gravity Exploration (AEDGE), will also complement other planned searches exploit synergies with wave detectors. give examples extended sensitivity matter offered...
We examine the theoretical motivations for long-lived particle (LLP) signals at LHC in a comprehensive survey of Standard Model (SM) extensions. LLPs are common prediction wide range theories that address unsolved fundamental mysteries such as naturalness, dark matter, baryogenesis and neutrino masses, represent natural generic possibility physics beyond SM (BSM). In most cases LLP lifetime can be treated free parameter from $\mu$m scale up to Big Bang Nucleosynthesis limit $\sim 10^7$m....
Particles beyond the Standard Model (SM) can generically have lifetimes that are long compared to SM particles at weak scale. When produced experiments such as Large Hadron Collider (LHC) CERN, these long-lived (LLPs) decay far from interaction vertex of primary proton-proton collision. Such LLP signatures distinct those promptly decaying targeted by majority searches for new physics LHC, often requiring customized techniques identify, example, significantly displaced vertices, tracks with...
This document presents a summary of the 2023 Terrestrial Very-Long-Baseline Atom Interferometry Workshop hosted by CERN. The workshop brought together experts from around world to discuss exciting developments in large-scale atom interferometer (AI) prototypes and their potential for detecting ultralight dark matter gravitational waves. primary objective was lay groundwork an international TVLBAI proto-collaboration. collaboration aims unite researchers different institutions strategize...
A bstract Many motivated extensions of the Standard Model predict existence cosmic strings. Gravitational waves originating from dynamics resulting string network have ability to probe many otherwise inaccessible properties early universe. In this study we show how spectrum gravitational a can be used test equation state universe prior Big Bang Nucleosynthesis (BBN). We also demonstrate that current and planned wave detectors such as LIGO, LISA, DECIGO/BBO, ET/CE potential detect signals...
Cosmic strings are generic cosmological predictions of many extensions the standard model particle physics, such as a $U(1{)}^{\ensuremath{'}}$ symmetry-breaking phase transition in early Universe or remnants superstring theory. Unlike other topological defects, cosmic can reach scaling regime that maintains small fixed fraction total energy density from very epoch until today. If present, they will oscillate and generate gravitational waves with frequency spectrum imprints dominant sources...
We initiate the study of novel thermal dark matter (DM) scenarios where present-day annihilation DM in galactic center produces boosted stable particles sector. These are typically a subdominant component, but because they produced with large Lorentz boost this process, can be detected volume terrestrial experiments via neutral-current-like interactions electrons or nuclei. This signal thus combines production mechanism associated indirect detection (i.e. annihilation) direct scattering off...
The generation of the asymmetric cosmic baryon abundance requires a departure from thermal equilibrium in early universe. In large class baryogenesis models, asymmetry results out-of-equilibrium decay new, massive particle. We highlight that interesting scenario where this particle has weak scale mass, condition proper length larger than O(1) mm. Such new fields are within reach LHC, at which they can be pair produced leaving distinctive, displaced-vertex signature. This is realized recently...
With the advent of a new generation neutrino experiments which leverage high-intensity beams for precision measurements, it is timely to explore physics topics beyond standard neutrino-related physics. Given that realm model (BSM) has been mostly sought at high-energy regimes colliders, such as LHC CERN, exploration BSM in will enable complementary measurements energy balance LHC. This concert with ideas fixed target and beam-dump world-wide, e.g., those CERN. The combination high intensity...
A bstract Global cosmic strings are predicted in many motivated extensions to the Standard Model of particle physics, with close connections axion dark matter physics. Recent studies suggest that, although subdominant relative Goldstone emission, gravitational wave (GW) signals from global can be detectable current and planned GW detectors such as LIGO, LISA, DECIGO/BBO, ET/CE AEDGE/AION, well pulsar timing arrays PPTA, NANOGrav SKA. This work is an extensive, updated study on GWs a string...
Abstract We summarise the discussions at a virtual Community Workshop on Cold Atoms in Space concerning status of cold atom technologies, prospective scientific and societal opportunities offered by their deployment space, developments needed before atoms could be operated space. The technologies discussed include atomic clocks, quantum gravimeters accelerometers, interferometers. Prospective applications metrology, geodesy measurement terrestrial mass change due to, e.g., climate change,...
Leptogenesis is generally challenging to directly test due the very high energy scales involved. In this Letter, we propose a new probe for leptogenesis with cosmological collider physics. With example of Higgs collider, demonstrate that during inflation models can produce detectable primordial non-Gaussianity distinctive oscillatory patterns encode information about lepton-number violating couplings, Majorana right-hand neutrino masses, and CP phases, which are essential leptogenesis.
We propose a robust, unified framework, in which the similar baryon and dark matter cosmic abundances both arise from physics of weakly interacting massive particles (WIMPs), with rough quantitative success so-called ``WIMP miracle.'' In particular asymmetry arises decay metastable WIMP after its thermal freeze-out at or below weak scale. A minimal model embedding $R$-parity violating supersymmetry are studied as examples. The new mechanism saves potential crisis washing out primordial...
We consider theories where dark matter is composed of a thermal relic weak scale mass, whose couplings to the Standard Model (SM) are however too small give rise observed abundance. Instead, abundance set by annihilation light hidden sector states that carry no charges under SM gauge interactions. In such scenario constraints from direct and indirect detection, collider searches for matter, can easily be satisfied. The masses protected symmetry if they Nambu-Goldstone bosons, fermions, or...
A method is proposed for distinguishing highly boosted hadronically-decaying $W$'s ($W$ jets) from QCD-jets using jet substructure. Previous methods, such as the filtering/mass-drop method, can give a factor of $\ensuremath{\sim}2$ improvement in $S/\sqrt{B}$ ${p}_{T}\ensuremath{\gtrsim}200\text{ }\text{ }\mathrm{GeV}$. In contrast, multivariate approach including new discriminants $R$ cores, which characterize shape $W$ jet, subjet planar flow, and grooming-sensitivities shown to provide...
The Compact Linear Collider (CLIC) is a mature option for the future of high energy physics. It combines benefits clean environment $e^+e^-$ colliders with operation at centre-of-mass energies, allowing to probe scales beyond reach Large Hadron (LHC) many scenarios new This places CLIC project privileged spot in between precision and frontiers, capabilities that will significantly extend knowledge on both fronts end LHC era. In this report we review revisit potential search, directly...
In a broad class of theories, the relic abundance dark matter is determined by interactions internal to thermalized sector, with no direct involvement Standard Model (SM). We point out that these theories raise an immediate cosmological question: how was sector initially populated in early universe? Motivated part difficulty accommodating large amounts entropy carried radiation cosmic microwave background measurements effective number relativistic species at recombination, N eff , we aim...
The Laser Interferometer Space Antenna (LISA) has two scientific objectives of cosmological focus: to probe the expansion rate universe, and understand stochastic gravitational-wave backgrounds their implications for early universe particle physics, from MeV Planck scale. However, range potential applications gravitational wave observations extends well beyond these objectives. This publication presents a summary state art in LISA cosmology, theory methods, identifies new opportunities use...
We investigate a generic source of stochastic gravitational wave background due to the parametric resonance oscillating scalar fields in early Universe. By systematically analyzing benchmark models through lattice simulations and considering wide range parameters, we demonstrate that such scenario can lead detectable signals detectors over broad frequency potentially address recent findings by pulsar timing array experiments. Furthermore, these naturally yield ultralight dark matter...