A5107061555- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Computational Physics and Python Applications
- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Medical Imaging Techniques and Applications
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Particle Accelerators and Free-Electron Lasers
- Silicon and Solar Cell Technologies
- Nuclear reactor physics and engineering
- Distributed and Parallel Computing Systems
- Nuclear physics research studies
- Gamma-ray bursts and supernovae
- Radiation Effects in Electronics
- Pulsars and Gravitational Waves Research
- CCD and CMOS Imaging Sensors
- Cold Atom Physics and Bose-Einstein Condensates
- Nuclear Physics and Applications
- Superconducting Materials and Applications
Kansas State University
2016-2025
University of Antwerp
2023-2024
A. Alikhanyan National Laboratory
2013-2024
European Organization for Nuclear Research
1997-2024
Institute of High Energy Physics
2022-2024
University of Washington
2024
Vrije Universiteit Brussel
2023-2024
California Institute of Technology
2004-2024
University of Aveiro
2019-2023
Sofia University "St. Kliment Ohridski"
2023
Abstract A multi-TeV muon collider offers a spectacular opportunity in the direct exploration of energy frontier. Offering combination unprecedented collisions comparatively clean leptonic environment, high has unique potential to provide both precision measurements and highest reach one machine that cannot be paralleled by any currently available technology. The topic generated lot excitement Snowmass meetings continues attract large number supporters, including many from early career...
New results for the double spin asymmetry A1p and proton longitudinal structure function g1p are presented. They were obtained by COMPASS Collaboration using polarised 200 GeV muons scattered off a longitudinally NH3 target. The data collected in 2011 complement those recorded 2007 at 160 GeV, particular lower values of x. improve statistical precision g1p(x) about factor two region x≲0.02. A next-to-leading order QCD fit to g1 world is performed. It leads new determination quark...
Proteins play a central role in biology from immune recognition to brain activity. While major advances machine learning have improved our ability predict protein structure sequence, determining function its sequence or remains challenge. Here, we introduce holographic convolutional neural network (H-CNN) for proteins, which is physically motivated approach model amino acid preferences structures. H-CNN reflects physical interactions and recapitulates the functional information stored...
This report summarizes the work of Energy Frontier Top Quark working group 2013 Community Summer Study (Snowmass).
We observe a deuteron beam polarization lifetime near 1000 s in the horizontal plane of magnetic storage ring (COSY). This long spin coherence time is maintained through combination bunching, electron cooling, sextupole field corrections, and suppression collective effects current limits. record required for search an intrinsic electric dipole moment on at statistical sensitivity level approaching 10^{-29} e cm.
Exclusive production of $\eta\pi^-$ and $\eta'\pi^-$ has been studied with a $191\,\textrm{GeV}/c$ $\pi^-$ beam impinging on hydrogen target at COMPASS (CERN). Partial-wave analyses reveal different odd/even angular momentum ($L$) characteristics in the inspected invariant mass range up to $3\,\textrm{GeV}/c^2$. A striking similarity between two systems is observed for $L=2,4,6$ intensities (scaled by kinematical factors) relative phases. The known resonances $a_2(1320)$ $a_4(2040)$ are line...
Atoms undergoing Bloch oscillations (BOs) in an accelerating optical lattice acquire momentum of two photon recoils per BO. This technique provides a large transfer tool for atom optics, but its full exploitation interferometric sensors requires both experimental and theoretical characterization associated phases. Each BO involves Landau-Zener crossing with multiple crossings inducing interference known as Stückelberg interference. We develop multipath interferometer investigate atomic phase...
The COMPASS collaboration at CERN has investigated pion Compton scattering, π(-)γ→π(-)γ, center-of-mass energy below 3.5 masses. process is embedded in the reaction π(-)Ni→π(-)γNi, which initiated by 190 GeV pions impinging on a nickel target. exchange of quasireal photons selected isolating sharp Coulomb peak observed smallest momentum transfers, Q(2)<0.0015 (GeV/c)(2). From sample 63,000 events, electric polarizability determined to be α(π)=(2.0±0.6(stat)±0.7(syst))×10(-4) fm(3) under...
We report on the first measurement of exclusive single-photon muoproduction proton by COMPASS using 160 GeV/c polarised μ+ and μ− beams CERN SPS impinging a liquid hydrogen target. determine dependence average measured cross sections for deeply virtual Compton scattering squared four-momentum transfer t from initial to final proton. The slope B t-dependence is fitted with single exponential function, which yields B=(4.3±0.6stat|sys−0.3+0.1)(GeV/c)−2. This result can be converted into...
Precise measurements of charged-kaon multiplicities in deep inelastic scattering were performed. The results are presented three-dimensional bins the Bjorken scaling variable x, relative virtual-photon energy y, and fraction z carried by produced hadron. data obtained COMPASS Collaboration 160 GeV muons off an isoscalar 6LiD target. They cover kinematic domain 1(GeV/c)2<Q2<60(GeV/c)2 photon virtuality, 0.004<x<0.4, 0.1<y<0.7, 0.20<z<0.85, W>5 GeV/c2 invariant mass hadronic system. from sum...
A search for the exclusive production of Zc±(3900) hadron by virtual photons has been performed in channel Zc±(3900)→J/ψπ±. The data cover range from 7 GeV to 19 centre-of-mass energy photon–nucleon system. full set COMPASS collected with a muon beam between 2002 and 2011 used. An upper limit ratio BR(Zc±(3900)→J/ψπ±)×σγN→Zc±(3900)N/σγN→J/ψN 3.7×10−3 established at confidence level 90%.
The COMPASS experiment recently discovered a new isovector resonance-like signal with axial-vector quantum numbers, the $a_1(1420)$, decaying to $f_0(980)\pi$. With mass too close and width smaller than ground state $a_1(1260)$, it was immediately interpreted as light exotic meson, similar $X$, $Y$, $Z$ states in hidden-charm sector. We show that fully matching experimental data is produced by decay of $a_1(1260)$ resonance into $K^\ast(\to K\pi)\bar{K}$ subsequent rescattering through...
We study the spin-exotic $J^{PC} = 1^{-+}$ amplitude in single-diffractive dissociation of 190 GeV$/c$ pions into $\pi^-\pi^-\pi^+$ using a hydrogen target and confirm $\pi_1(1600) \to \rho(770) \pi$ amplitude, which interferes with nonresonant $1^{-+}$ amplitude. demonstrate that conflicting conclusions from previous studies on these amplitudes can be attributed to different analysis models treatment dependence squared four-momentum transfer we thus reconcile their experimental findings....
We report on a measurement of hard exclusive $\pi^0$ muoproduction the proton by COMPASS using 160 GeV/$c$ polarised $\mu^+$ and $\mu^-$ beams CERN SPS impinging liquid hydrogen target. From average measured cross sections, virtual-photon section is determined as function squared four-momentum transfer between initial final in range $0.08\,(\text{GeV/}c)^2 < |t| 0.64\,(\text{GeV/}c)^2$. The kinematics are $\langle Q^2 \rangle =2.0\; {(\text{GeV}/c)^2}$, \nu = 12.8\; {\text{GeV}}$, x_{Bj}...
The transverse spin asymmetries measured in semi-inclusive leptoproduction of hadrons, when weighted with the hadron momentum $P_T$, allow for extraction important transverse-momentum-dependent distribution functions. In particular, Sivers provide direct information on function, which is a leading-twist that arises from correlation between an unpolarised quark transversely polarised nucleon and nucleon. Using high-statistics data collected by COMPASS Collaboration 2010 proton target, we have...
The production of vector mesons in deep inelastic scattering is an interesting yet scarsely explored channel to study the transverse spin structure nucleon and related phenomena. COMPASS collaboration has performed first measurement Collins Sivers asymmetries for inclusively produced $\rho^0$ mesons. analysis based on data set collected $2010$ using a $160\,\,\rm{GeV}/c$ $\mu^+$ beam impinging transversely polarized $\rm{NH}_3$ target. $\rho^{0}$ are selected from oppositely charged hadron...
Single hadron azimuthal asymmetries of positive and negative hadrons produced in muon semi-inclusive deep inelastic scattering off longitudinally polarised deuterons are determined using the 2006 COMPASS data also combined all deuteron data. For each charge, dependence asymmetry on angle $\phi$ is obtained by means a five-parameter fitting function that besides $\phi$-independent term includes four modulations predicted theory: $\sin\phi$, $\sin 2 \phi$, 3\phi$ $\cos\phi$. The amplitudes...
We derive the linear complexity of quaternary sequences length pq with low autocorrelation over finite field four elements and ring order 4. Also we examine other pq.