A5034822799- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Pulsars and Gravitational Waves Research
- Black Holes and Theoretical Physics
- Atomic and Subatomic Physics Research
- Astrophysics and Cosmic Phenomena
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Stellar, planetary, and galactic studies
- Neutrino Physics Research
- Gamma-ray bursts and supernovae
- Computational Physics and Python Applications
- Astro and Planetary Science
- Cold Atom Physics and Bose-Einstein Condensates
- Geophysics and Sensor Technology
- Experimental and Theoretical Physics Studies
- Astronomy and Astrophysical Research
- Geophysics and Gravity Measurements
- Radio Astronomy Observations and Technology
- Quantum Information and Cryptography
- Random lasers and scattering media
- Physics of Superconductivity and Magnetism
- Advanced Frequency and Time Standards
- Music and Audio Processing
University of Geneva
2022-2025
SLAC National Accelerator Laboratory
2018-2022
Université Paris-Saclay
2022
Institut de Physique Théorique
2021-2022
Centre National de la Recherche Scientifique
2022
CEA Paris-Saclay
2022
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2022
Menlo School
2018-2022
Stanford University
2020
University of Michigan
2014-2018
Abstract High energy collisions at the High-Luminosity Large Hadron Collider (LHC) produce a large number of particles along beam collision axis, outside acceptance existing LHC experiments. The proposed Forward Physics Facility (FPF), to be located several hundred meters from ATLAS interaction point and shielded by concrete rock, will host suite experiments probe standard model (SM) processes search for physics beyond (BSM). In this report, we review status civil engineering plans explore...
We give a detailed treatment of electromagnetic signals generated by gravitational waves (GWs) in resonant cavity experiments. Our investigation corrects and builds upon previous studies carefully accounting for the gauge dependence relevant quantities. work preferred frame laboratory, proper detector frame, show how to resum short-wavelength effects provide analytic results that are exact GWs arbitrary wavelength. This formalism allows us firmly establish that, contrary claims, experiments...
We consider interpretations of the recent ∼ 3σ reports by CMS and ATLAS collaborations a possible X (∼750 GeV) state decaying into γγ final states. focus on possibilities that this is scalar or pseudoscalar electroweak isoscalar produced gluon-gluon fusion mediated loops heavy fermions. several models for these fermions, including single vector-like charge 2/3 T quark, doublet quarks (T, B), generation quarks, with without leptons also contribute to → decay amplitude. possibility (750) dark...
This report summarises the physics opportunities in search and study of beyond Standard Model at a 100 TeV pp collider.
The Universal One-Loop Effective Action (UOLEA) is a general expression for the effective action obtained by evaluating in model-independent way one-loop expansion of functional path integral. It can be used to match UV theories their low-energy EFTs more efficiently avoiding redundant steps application methods, simplifying process obtaining Wilson coefficients operators up dimension six. In addition loops involving only heavy fields, matching may require inclusion containing both and light...
Recently, a general result for evaluating the path integral at one loop was obtained in form of Universal One-Loop Effective Action. It may be used to derive effective field theory operators dimensions up six, by traces matrices this expression, with mass dependence encapsulated universal coefficients. Here we show that it can account loops mixed heavy–light particles matching procedure. Our prescription computing these contributions Wilson coefficients is conceptually simple. Moreover has...
A bstract We propose an approach to search for axion dark matter with a specially designed superconducting radio frequency cavity, targeting axions masses m ≲ 10 − 6 eV. Our exploits axion-induced transitions between nearly degenerate resonant modes of ∼ GHz. scan over mass is achieved by varying the splitting two modes. Compared traditional approaches, this allows parametrically enhanced signal power lighter than The projected sensitivity covers unexplored parameter space QCD 8 eV and...
Superconducting cavities can operate analogously to Weber bar detectors of gravitational waves, converting mechanical electromagnetic energy. The significantly reduced noise results in increased sensitivity high-frequency signals well outside the bandwidth lowest resonance. In this work, we revisit such waves and demonstrate that a setup similar existing MAGO prototype, operating scanning or broadband manner, could have strains...
We argue that dielectric haloscopes like MADMAX, originally designed for detecting axion dark matter, are also very promising gravitational wave detectors. Operated in resonant mode at frequencies around <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mi mathvariant="script">O</a:mi><a:mo stretchy="false">(</a:mo><a:mn>10</a:mn><a:mtext> </a:mtext><a:mtext> </a:mtext><a:mi>GHz</a:mi><a:mo stretchy="false">)</a:mo></a:mrow></a:math>, these detectors benefit...
With the renewed interest in vector-like fermion extensions of Standard Model, we present here a study multiple theories and their phenomenological implications. Our focus is mostly on minimal flavor conserving that couple fermions to SM gauge fields mix only weakly with so as avoid problems. We calculations for precision electroweak state decays, which are needed investigate compatibility currently known data. impact Higgs boson production decay, including loop contributions, wide variety...
A bstract The unitarity of the lepton mixing matrix is a critical assumption underlying standard neutrino-mixing paradigm. However, many models seeking to explain as-yet-unknown origin neutrino masses predict deviations from in active states. Motivated by prospect that future experiments may provide precise measurement matrix, we revisit current constraints on violation oscillation measurements and project how next-generation will improve our knowledge. With data, normalizations all rows...
We propose a new broadband search strategy for ultralight axion dark matter that interacts with electromagnetism. An oscillating field induces transitions between two quasi-degenerate resonant modes of superconducting cavity. In runs optimized high and low masses, this setup can probe unexplored parameter space axion-like particles covering fifteen orders magnitude in mass, including astrophysically long-ranged fuzzy matter.
We show that the QCD axion couples to electromagnetic kinetic term at one loop. The result is if axions make up dark matter, they induce temporal variation of fine structure constant <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>α</a:mi></a:math>, which severely constrained. recast these constraints on parameter space. also discuss how generalize our finding axionlike particles, and resulting constraints. Published by American Physical Society 2024
We argue, based on typical properties of known solutions string or M theory, that the lightest supersymmetric particle visible sector is likely to be unstable. In other words, dark matter probably not a with standard model quantum numbers, such as weakly interacting massive particle. The argument simple and occurrence (a) hidden sectors, (b) interactions between (visible) these (c) lack an against neutral particles being lighter than These conclusions do rely arguments R-parity violation.
We report on the status of efforts to improve reinterpretation searches and measurements at LHC in terms models for new physics, context Reinterpretation Forum. detail current experimental offerings direct particles, measurements, technical implementations Open Data, provide a set recommendations further improving presentation results order better enable future. also brief description existing software frameworks recent global analyses physics that make use data.
The fundamental couplings of the Standard Model are known to vary as a function energy scale through Renormalisation Group (RG), and have been measured at electroweak colliders. However, variation temperature need not be same, raising possibility that in early universe were values predicted by RG evolution. We study how such temperature-variance can aid production baryon asymmetry baryogenesis. do so context augmented higher-dimensional operators up dimension 6.
Pairs of Standard Model fermions form dimension-3 singlet operators that can couple to new dark sector states. This "fermion portal" is be contrasted with the lower-dimensional Higgs, vector and neutrino portals. We characterise its distinct phenomenology place effective field theory bounds on this framework, focusing case fermion portals a pair light fermions. obtain current projected limits dimension-6 operator scale from variety meson decay experiments, missing energy long-lived particle...
We consider resonant wavelike dark matter conversion into low-frequency radio waves in the Earth’s ionosphere. Resonant occurs when mass and plasma frequency coincide, defining a range <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"...
We propose a new strategy to directly detect light particle dark matter that has long-ranged interactions with ordinary matter. The approach involves distorting the local flow of time-varying fields and measuring these distortions shielded resonant detectors. apply this idea sub-MeV particles very small electric charges or coupled vector mediator, including freeze-in parameter space targeted by low mass direct detection efforts. This can probe masses ranging from 10 MeV below meV, extending...
Recent development of path integral matching techniques based on the covariant derivative expansion has made manifest a universal structure one-loop effective Lagrangians. The terms can be computed once and for all to serve as reference calculations ease their automation. Here we present fermionic action (UOLEA), resulting from integrating out heavy fermions with scalar, pseudo-scalar, vector axial-vector couplings. We also clarify relation new here previously in literature those that remain...
We present a comprehensive analysis of leptonic unitarity triangles, using both current neutrino oscillation data and projections next-generation measurements. Future experiments, sensitive to the degree CP violation in lepton sector, will enable construction precise triangles. show how could manifest triangles discuss they serve as tests. also propose use Jarlskog factors complementary means probing unitarity. This highlights importance testing mixing matrix, an understanding which is...