A5029334681- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Cosmology and Gravitation Theories
- Atomic and Subatomic Physics Research
- Gamma-ray bursts and supernovae
- Neutrino Physics Research
- Quantum Chromodynamics and Particle Interactions
- Computational Physics and Python Applications
- Astrophysics and Cosmic Phenomena
- Cold Atom Physics and Bose-Einstein Condensates
- High-Energy Particle Collisions Research
- Quantum and Classical Electrodynamics
- Advanced X-ray Imaging Techniques
- Pulsars and Gravitational Waves Research
- Laser-Plasma Interactions and Diagnostics
- Gaussian Processes and Bayesian Inference
- Scientific Computing and Data Management
- Particle Accelerators and Free-Electron Lasers
- Quantum Electrodynamics and Casimir Effect
Lawrence Berkeley National Laboratory
2024-2025
University of California System
2024-2025
University of California, Berkeley
2024
Weizmann Institute of Science
2019-2023
A bstract We discuss models of ultralight scalar Dark Matter (DM) with linear and quadratic couplings to the Standard Model (SM). In addition studying phenomenology interactions separately, we examine their interplay. review different experiments that can probe such present current expected future bounds on parameter space. particular, field solution presented in [A. Hees, O. Minazzoli, E. Savalle, Y. V. Stadnik P. Wolf, Phys.Rev.D 98 (2018) 6, 064051], extend it theories capture both...
It has long been established that axions could have produced within the nascent proto-neutron star formed following type II supernova SN1987A, escaped due to their weak interactions, and then converted gamma rays in Galactic magnetic fields; nonobservation of a gamma-ray flash coincident with neutrino burst leads strong constraints on axion-photon coupling for axion masses <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"...
We show that, in the Nelson-Barr solution to strong <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>C</a:mi><a:mi>P</a:mi></a:math>-problem, a naturally light scalar can arise. It gives rise completely new phenomenology beyond that of celebrated QCD axion, if this field constitutes dark matter, as elements Cabibbo–Kobayashi–Maskawa matrix vary periodically time. also discuss how model be tested using quantum sensors, particular nuclear clocks, which leads an...
This Letter of Intent describes LUXE (Laser Und XFEL Experiment), an experiment that aims to use the high-quality and high-energy electron beam European a powerful laser. The scientific objective is study quantum electrodynamics processes in regime strong fields. High-energy electrons, accelerated by linear accelerator, photons, produced via Bremsstrahlung those colliding with laser shall experience electric field up three times larger than Schwinger critical (the at which vacuum itself...
We propose and experimentally demonstrate a method for detection of light scalar dark matter (DM) field through probing temporal oscillations fundamental constants in an atomic optical transition. Utilizing the quantum information notion dynamic decoupling (DD) tabletop setting, we are able to obtain model-independent bounds on variations $\ensuremath{\alpha}$ ${m}_{e}$ at frequencies up MHz scale. interpret our results constrain parameter space DM models. consider generic case, where...
A bstract If Ultra-light dark matter (ULDM) exists and couples to neutrinos, the neutrino oscillation probability might be significantly altered by a parametric resonance. This resonance can occur if typical frequency of flavor-oscillations ∆ m 2 / (2 E ), where is mass-squared difference neutrinos energy, matches ULDM field, determined its mass, ϕ . The could lead observable effects even coupling very small, period, given τ = π/m , much shorter than experimental temporal resolution....
Spin-0 singlets arise in well-motivated extensions of the Standard Model. Their lifetime determines best search strategies at hadron and lepton colliders. To cover a large range singlet decay lengths, we investigate bounds from Higgs decays into pair singlets, considering signatures invisible decays, displaced delayed jets, coupling fits untagged decays. We examine generic scalar relaxion, derive matching as well qualitative differences between them. For each model, discuss its natural...
Scalar ultralight dark matter (ULDM) interacting with neutrinos can induce, under certain conditions, time dependent modifications to neutrino oscillation probabilities. The limit in which the ULDM perturbation be treated as constant throughout propagation has been addressed by several previous works. We complement these systematically analyzing opposite limit---accounting for temporal variations of field solving Schr\"odinger equations. In particular, we study a novel two-generations-like...
Thousands of person years have been invested in searches for new physics (NP), the majority them motivated by theoretical considerations. Yet, no evidence beyond Standard Model has found. This suggests that model-agnostic might be an important key to explore NP, and help discover unexpected phenomena which can inspire future developments. A possible strategy such is identifying asymmetries between data samples are expected symmetric within Model. We propose exploiting neural networks (NNs)...
A bstract Colored and colorless particles that are stable on collider scales carry exotic electric charges, so-called Multiply-Charged Heavy Stable Particles (MCHSPs), exist in extensions of the Standard Model, can include top partner(s) solutions hierarchy problem. To obtain bounds color-triplets color-singlets charges up to | Q = 8, we recast searches for signatures two production channels: “open” channel — where pair-produced above threshold, detectable dedicated LHC multiply charged...
A bstract In this paper we study CP violation in photon self-interactions at low energy. These interactions, mediated by the effective operator $$ FFF\tilde{F} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>FFF</mml:mi> <mml:mover> <mml:mi>F</mml:mi> <mml:mo>˜</mml:mo> </mml:mover> </mml:math> , where ( \tilde{F} ) F is (dual) electromagnetic field strength, have yet to be directly probed experimentally. Possible sources for such interactions are weakly coupled light...
A bstract The LHCb experiment measured the time-dependent CP asymmetries C KK and S in B s → K + − decay. Combining with corresponding ππ π decay, we find that size of U -spin breaking this system is order 20%. Moreover, data suggest these effects are dominated by factorizable contributions. We further study constraints on new physics contributions to b $$ u\overline{u}q <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>u</mml:mi> <mml:mover> <mml:mo>¯</mml:mo> </mml:mover>...
We discuss models of ultralight scalar Dark Matter (DM) with linear and quadratic couplings to the Standard Model (SM). In addition studying phenomenology interactions separately, we examine their interplay. review different experiments that can probe such present current expected future bounds on parameter space. particular, field solution presented in [A. Hees, O. Minazzoli, E. Savalle, Y. V. Stadnik P. Wolf, Phys.Rev.D 98 (2018) 6, 064051], extend it theories capture both DM SM....
We show that, in the Nelson-Barr solution to strong CP-problem, a naturally light scalar can arise. It gives rise completely new phenomenology beyond that of celebrated QCD axion, if this field constitutes dark matter, as CKM elements vary periodically time. also discuss how model be tested using quantum sensors, particular nuclear clocks, which leads an interesting synergy between different frontiers physics.
It has long been established that axions could have produced through the Primakoff process within nascent proto-neutron-star formed following type II supernova SN1987A, escaped star due to their weak interactions, and then converted gamma-rays in Galactic magnetic fields; non-observation of a gamma-ray flash coincident with neutrino burst leads strong constraints on axion-photon coupling for axion masses $m_a \lesssim 10^{-10}$ eV. In this work we use SN1987A constrain, first time, higher...
Heavy axions that couple to both quantum electrodynamics and chromodynamics with masses on the order of MeV - GeV high-scale decay constants in excess $\sim$$10^8$ may arise generically e.g. axiverse constructions. In this work we provide most sensitive search to-date for existence such heavy using Fermi-LAT data towards four recent supernovae (SN): Cas A, SN1987A, SN2023ixf, SN2024ggi. We account axion production proto-neutron-star cores through nuclear electromagnetic processes then...
Thousands of person-years have been invested in searches for New Physics (NP), the majority them motivated by theoretical considerations. Yet, no evidence beyond Standard Model (BSM) physics has found. This suggests that model-agnostic might be an important key to explore NP, and help discover unexpected phenomena which can inspire future developments. A possible strategy such is identifying asymmetries between data samples are expected symmetric within (SM). We propose exploiting neural...
The LHCb experiment measured the time-dependent CP asymmetries $C_{KK}$ and $S_{KK}$ in $B_s\to K^+K^-$ decay. Combining with corresponding $C_{\pi\pi}$ $S_{\pi\pi}$ $B\to \pi^+\pi^-$ decay, we find that size of $U$-spin breaking this system is order $20\%$. Moreover, data suggest these effects are dominated by factorizable contributions. We further study constraints on new physics contributions to $b\to u\bar uq$ ($q=s,d$). New minimally flavor violating (MFV) cannot be distinguished from...
Scalar ultra-light dark matter (ULDM) interacting with neutrinos can induce, under certain conditions, time-dependent modifications to neutrino oscillation probabilities. The limit in which the ULDM perturbation be treated as constant throughout propagation time has been addressed by several previous works. We complement these systematically analyzing opposite -- accounting for temporal-variations of potential solving Schr\"odinger equations. In particular, we study a novel...
If ultra-light dark matter (ULDM) exists and couples to neutrinos, the neutrino oscillation probability might be significantly altered by a parametric resonance. This resonance can occur if typical frequency of flavor-oscillations $Δm^2/(2E)$, where $Δm^2$ is mass-squared difference neutrinos $E$ energy, matches ULDM field, determined its mass, $m_ϕ$. The could lead observable effects even coupling very small, period, given $τ_ϕ=2π/m_ϕ$, much shorter than experimental temporal resolution....