A5041088714- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Radiation Detection and Scintillator Technologies
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Nuclear Physics and Applications
- Atomic and Subatomic Physics Research
- Black Holes and Theoretical Physics
- Advanced Fiber Laser Technologies
- Laser-Plasma Interactions and Diagnostics
- Laser Design and Applications
- Laser-Matter Interactions and Applications
- Laser Material Processing Techniques
- Photocathodes and Microchannel Plates
- Astrophysics and Cosmic Phenomena
- Atomic and Molecular Physics
- Gyrotron and Vacuum Electronics Research
- Superconducting Materials and Applications
- CCD and CMOS Imaging Sensors
- Advanced Optical Sensing Technologies
- Advanced X-ray Imaging Techniques
University of Southern Denmark
2019-2024
European Organization for Nuclear Research
2015-2024
University of Edinburgh
2016-2024
University of Alabama
2023
University of Southampton
2015-2022
Brookhaven National Laboratory
2009-2022
Xi'an Jiaotong University
2022
University of North Carolina at Chapel Hill
2022
Peking University
2022
University of California, Berkeley
2011-2022
We present a first-principles lattice QCD+QED calculation at physical pion mass of the leading-order hadronic vacuum polarization contribution to muon anomalous magnetic moment. The total up, down, strange, and charm quarks including QED strong isospin breaking effects is a_{μ}^{HVP LO}=715.4(18.7)×10^{-10}. By supplementing data for very short long distances with R-ratio data, we significantly improve precision LO}=692.5(2.7)×10^{-10}. This currently most precise determination LO}.
We compute the standard Euclidean window of hadronic vacuum polarization using multiple independent blinded analyses. improve continuum and infinite-volume extrapolations dominant quark-connected light-quark isospin-symmetric contribution address additional subleading systematic effects from sea-charm quarks residual chiral-symmetry breaking first principles. find ${a}_{\mathrm{\ensuremath{\mu}}}^{\mathrm{W}}=235.56(65)(50)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}10}$, which is...
We present the FP420 R&D project, which has been studying key aspects of development and installation a silicon tracker fast-timing detectors in LHC tunnel at 420 m from interaction points ATLAS CMS experiments. These would measure precisely very forward protons conjunction with corresponding central as means to study Standard Model (SM) physics, search for characterise new physics signals. This report includes detailed description case detector and, particular, measurement Central Exclusive...
Abstract Kaon physics is at a turning point – while the rare-kaon experiments NA62 and KOTO are in full swing, end of their lifetime approaching future experimental landscape needs to be defined. With HIKE, KOTO-II LHCb-Phase-II on table under scrutiny, it very good moment time take stock contemplate about opportunities these theoretical developments provide for particle coming decade beyond. This paper provides compact summary talks discussions from Kaons@CERN 2023 workshop, held September CERN.
We present results for the decay constants of D and s mesons computed in lattice QCD with N f = 2 + 1 dynamical flavours. The simulations are based on RBC/UKQCD's domain wall ensembles both physical unphysical light-quark masses spacings range 0.11-0.07 fm. employ discretisation all valence quarks. continuum limit 208.7(2.8)stat( − 1.8 2.1 )sysMeV $$ {f}_{D_s}=246.4{(1.3)}_{\mathrm{stat}}{\left({}_{-1.9}^{+1.3}\right)}_{\mathrm{sys}}\mathrm{M}\mathrm{e}\mathrm{V}...
We describe the characterization of TimepixCam, a novel camera used to time-stamp optical photons. The employs specialized silicon sensor with thin entrance window, read out by Timepix ASIC. TimepixCam is able record and light flashes exceeding 1,000 photons 15 ns time resolution. Specially produced photodiodes were evaluate quantum efficiency, which was determined be higher than 90% in wavelength range 430–900 nm. sensitivity ion detection efficiency compared for variety sensors different...
We present nonperturbative results for beyond the standard model kaon mixing matrix elements in isospin symmetric limit (<a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msub><a:mi>m</a:mi><a:mi>u</a:mi></a:msub><a:mo>=</a:mo><a:msub><a:mi>m</a:mi><a:mi>d</a:mi></a:msub></a:math>) of QCD, including a complete estimate all dominant sources systematic error. Our are obtained from numerical simulations lattice QCD with <c:math xmlns:c="http://www.w3.org/1998/Math/MathML"...
We study SU$(N_C)$ gauge theories with a single fermion in the two-index antisymmetric representation to predict mesonic spectrum of supersymmetric $\mathcal{N}=1$ SYM theories. Using gradient flow methods, we investigate fractional topological charges $N_C = 4$ ensembles varying lattice spacings. show that use overimproved actions (specifically DBW2 action) smearing kernel stabilises values charge already at moderate time, while this is not case for standard Wilson flow.
A bstract We propose a model-independent framework for fitting hadronic form-factor data, which is often only available at discrete kinematical points, using parameterisations based on to unitarity and analyticity. In this novel approach the latter two properties of quantum-field theory regulate ill-posed problem allow predictions over entire physical range. Kinematical constraints, example vector scalar form factors in semileptonic meson decays, can be imposed exactly. The core formulae are...
Semileptonic ${B}_{s}\ensuremath{\rightarrow}K\ensuremath{\ell}\ensuremath{\nu}$ decays provide an alternative $b$-decay channel to determine the Cabibbo-Kobayashi-Maskawa (CKM) matrix element $|{V}_{ub}|$ and obtain a $R$-ratio investigate lepton-flavor-universality violations. Results for CKM may also shed light on discrepancies seen between analyses of inclusive or exclusive decays. We calculate decay form factors using lattice QCD with domain-wall quarks relativistic $b$-quark. analyze...
We present results for the $SU(3)$ breaking ratios of decay constants $f_{D_s}/f_D$ and $f_{B_s}/f_B$ - first time with physical pion masses ratio bag parameters $B_{B_s}/B_{B_d}$, as well $ξ$, forming nonpeturbative contributions to neutral $B_{(s)}$ meson mixing. Our are based on Lattice QCD simulations chirally symmetric 2+1 dynamical flavors domain wall fermions. Eight ensembles at three different lattice spacing in range $a = 0.11 0.07\,\mathrm{fm}$ enter analysis two which feature...
We report the results of theoretical and experimental studies on passive spatiotemporal shaping cw mode-locked picosecond laser pulses for driving photocathode a high-brightness, high-current energy recovery linear accelerator. The temporal pulse shape is modified using birefringent crystals, while refractive optical system used to generate flattop spatial beam profile. An transport designed implemented deliver onto sited 9 m away from shapers. alignment tolerances shaper stacker have been...
We characterized the performance of Silicon Photomultipliers (SiPMs) before and after exposure up to 1012 neutron/cm2 dosage. show that typical orders magnitude increase dark current upon neutron irradiation can be suppressed by operating it at a lower temperature single-photoelectron detection capability restored. The required depends on dosage received. Furthermore, high thermal annealing, there is compelling evidence extrinsic lowered single-photon are some extent recovered room...
Particle-decaying states of the light nuclei $^{11,12}\mathrm{N}$ and $^{12}\mathrm{O}$ were studied using invariant-mass method. The decay energies intrinsic widths a number measured, momentum correlations three-body decaying considered. A second $2p$-decaying ${2}^{+}$ state was observed for first time, higher-energy in $4p+2\ensuremath{\alpha}$ channel. This channel also contains contributions from fissionlike paths, including...
We present a first numerical implementation of massive nonperturbative renormalisation scheme, RI/mSMOM, in the study heavy quarks using domain-wall fermion action. In particular, we calculate constants for bilinears at non-vanishing heavy-quark masses and compare approach to continuum renormalised charm-quark mass with that from mass-independent scheme.
We report initial results of exposing low-Z solid and high-Z liquid targets to 150-ns, 4/spl times/10/sup 12/ proton pulses with spot sizes on the order 1 2 mm. The energy deposition density approached 100 J/g. Diagnostics included fiberoptic strain sensors target high-speed photography targets. This work is part R&D program Neutrino Factory Muon Collider Collaboration.
We present a progress update on the RBC-UKQCD calculation of beyond standard model (BSM) kaon mixing matrix elements at physical point. Simulations are performed using 2+1 flavour domain wall lattice QCD with Iwasaki gauge action 3 spacings and pion masses ranging from 430 MeV to mass.
We report on an exploratory study of domain wall fermions (DWF) as a lattice regularisation for heavy quarks. Within the framework quenched QCD with tree-level improved Symanzik gauge action we identify DWF parameters which minimise discretisation effects. find corresponding effective 4d overlap operator to be exponentially local, independent quark mass. determine maximum bare mass am h ≈ 0.4, below approximate chiral symmetry and O(a)-improvement are sustained. This threshold appears...
We discuss the prospects for improving precision on hadronic corrections to anomalous magnetic moment of muon, and plans Muon $g-2$ Theory Initiative update Standard Model prediction.
We compute the spectrum of low-lying mesonic states with vector, scalar and pseudoscalar quantum numbers in QCD one flavor. With three colors fundamental two-index antisymmetric representations gauge group coincide. The latter is an orientifold theory that maps into bosonic sector $\mathcal{N}=1$ super Yang-Mills large number limit. employ Wilson fermions along tree-level improvement gluonic fermionic parts action. In this setup Dirac operator can develop real negative eigenvalues. therefore...
Abstract We discuss the main issues in dealing with heavy quarks on lattice and shortly present different approaches used. a selection of computations covering first b -quark mass $$B_{(s)}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>B</mml:mi> <mml:mrow> <mml:mo>(</mml:mo> <mml:mi>s</mml:mi> <mml:mo>)</mml:mo> </mml:mrow> </mml:msub> </mml:math> meson decay constants as consolidated results (neglecting isospin breaking corrections). In second part, we...