A5084238840- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Quantum Mechanics and Applications
- Pulsars and Gravitational Waves Research
- Mechanical and Optical Resonators
- Cosmology and Gravitation Theories
- Dark Matter and Cosmic Phenomena
- Nuclear physics research studies
- Quantum, superfluid, helium dynamics
- Atomic and Subatomic Physics Research
- Nuclear Physics and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Astrophysical Phenomena and Observations
- Astrophysics and Cosmic Phenomena
- Gamma-ray bursts and supernovae
- Quantum Information and Cryptography
- Particle Detector Development and Performance
- Particle accelerators and beam dynamics
- Advanced Materials Characterization Techniques
- Mechanics and Biomechanics Studies
- Radiopharmaceutical Chemistry and Applications
- Quantum Electrodynamics and Casimir Effect
- Noncommutative and Quantum Gravity Theories
- Distributed and Parallel Computing Systems
Lawrence Berkeley National Laboratory
2020-2025
Thomas Jefferson National Accelerator Facility
2020-2022
SLAC National Accelerator Laboratory
2019-2020
Stanford University
2019-2020
University of California, Irvine
2017-2019
Universitat de Barcelona
2007
Universidad de Jaén
2007
Center for Astrophysics Harvard & Smithsonian
2007
Max Planck Institute for Nuclear Physics
2007
Institució Catalana de Recerca i Estudis Avançats
2007
Observations of anomalous angular correlations in electron-positron pairs produced from excited states <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mmultiscripts><a:mi>He</a:mi><a:mprescripts/><a:none/><a:mn>4</a:mn></a:mmultiscripts><a:mo>,</a:mo><a:mo> </a:mo><a:mmultiscripts><a:mi>Be</a:mi><a:mprescripts/><a:none/><a:mn>8</a:mn></a:mmultiscripts></a:math>, and <b:math xmlns:b="http://www.w3.org/1998/Math/MathML"><b:mmultiscripts><b:mi...
The effective quantum field theory description of gravity, despite its non-renormalizability, allows for predictions beyond classical general relativity. As we enter the age gravitational wave astronomy, an important and timely question is whether measurable that depart from analogous to optics effects which cannot be explained by electrodynamics, can found. In this work, investigate signatures in waves using tools optics. Squeezed-coherent waves, exhibit sub-Poissonian graviton statistics,...
We present a 50 ks observation of the gamma-ray binary LSI+61303 carried out with ACIS-I array aboard Chandra X-ray Observatory. This is highest resolution source conducted so far. Possible evidence an extended structure at distance between 5 and 12 arcsec towards North have been found significance level 3.2 sigma. The asymmetry emission excludes interpretation in context dust-scattered halo, suggesting intrinsic nature. On other hand, while obtained flux, F_{0.3-10 keV}=7.1^{+1.8}_{-1.4} x...
We propose a theory in which the Standard Model gauge symmetry is extended by new $SU(2)_\ell$ group acting nontrivially on lepton sector spontaneously broken at TeV scale. Under this ordinary leptons form doublets along with partner fields. This construction naturally contains dark matter candidate, of right-handed neutrino, stabilized residual global $U(1)_\chi$ symmetry. show that one can explain baryogenesis through an asymmetric scenario, generation related asymmetries and baryon...
Diquark formation across a short-range nucleon-nucleon pair is proposed as the underlying QCD physics of correlations (SRC) in nuclei. SRC pairs have been cause distorted quark behavior nuclei; experimentally observed momentum distribution distortions termed EMC effect. The strong spatial overlap brings nucleon constituents within range inter-nucleon potentials and any bonds formed - such diquark bond affects their distributions. In this model, diquarks form 3C⊗3C→3¯C channel SU(3)C acting...
The spin structure function of the neutron is traditionally determined by measuring asymmetry inclusive electron deep inelastic scattering (DIS) off polarized3He nuclei. In such experiments, nuclear effects can lead to large model dependencies in interpretation experimental data. Here we study feasibility suppressing tagging both spectator protons process DIS neutrons in3He at forthcoming Electron-Ion Collider (EIC). This allows reconstructing momentum struck ensure it was nearly rest...
We present XMM-Newton observations of the eclipsing, disc accreting, cataclysmic variable OY Car which were obtained as part performance verification phase mission. The star was observed 4 days after an outburst and then again 5 weeks later when it in a quiescent state. There is quasi-stable modulation X-rays at ~2240 s, most prominent lowest energies. speculate that this may be related to spin period white dwarf. duration eclipse ingress egress 20-30 s. This indicates bulk X-ray emission...
The physics case for quarkonium-production studies accessible at the US Electron Ion Collider is described.
A theoretical framework for the quantization of gravity has been an elusive Holy Grail since birth quantum theory and general relativity. While generations scientists have attempted to find solutions this deep riddle, alternative path built upon idea that experimental evidence could determine whether is quantized decades in making. The possibility answer question renewed interest era gravitational wave detectors. We review investigate important subset phenomenological gravity, detecting...
Abstract By utilizing quantum optics techniques, we examine the characteristics of a gravitational wave (GW) signature at interferometers. In particular, study problem by analyzing equations motion GW interacting with an idealized interferometer. Using this method, reconstruct classical signal from representation version almost monochromatic (a single-mode coherent state), then discuss experimental signatures some specific, more general states. We calculate observables that could be used...
The CLAS collaboration at Jefferson Laboratory has compared nuclear parton distributions for a range of targets and found that the EMC effect measured in deep inelastic lepton-nucleus scattering strongly "isophobic" nature. This surprising observation suggests short-range correlations between neighboring $n$ $p$ nucleons wavefunctions are much stronger to $p-p$ or $n-n$ correlations. In this paper we propose definitive experimental test nucleon-nucleon explanation isophobic nature effect:...
Observation of the onset color transparency in baryons would provide a new means studying nuclear strong force and be first clear evidence transforming into color-neutral point-like size nucleus as predicted by quantum chromodynamics. Recent C(e,e′p) results from electron-scattering did not observe (CT) protons up to spacelike four-momentum transfers squared, Q2=14.2 GeV2. The traditional methods searching for CT (e,e′p) scattering use heavy targets favoring kinematics with already initially...
A nuclear physics example of statistical bootstrap is used on the MARATHON data nucleon structure function ratio, $\frac{F_2^n}{F_2^p}$, in quark momentum fraction $x_B\rightarrow0$ and $x_B\rightarrow1$ regions. The extrapolated $F_2$ ratio value as $x_B\rightarrow 1$ approaches 0.4 this compared to theoretical predictions. when 0$ favors simple model isospin symmetry with complete dominance seaquarks at low fraction. At high-$x_B$, proton distribution $d/u$ derived from $x\rightarrow...
Hidden-color configurations are a key prediction of QCD with important physical consequences. In this work we examine color-singlet configuration in nuclei formed by combining six scalar $[u d]$ diquarks strongly bound $\rm SU(3)_C$ channel. The resulting hexadiquark state is charge-2, spin-0, baryon number-4, isospin-0, state. It contributes to alpha clustering light and the additional binding energy not saturated ordinary nuclear forces \he as well alpha-nuclei sequence interest for...
A new electron scattering experiment (E12-21-003) to verify and understand the nature of hidden sector particles, with particular emphasis on so-called X17 particle, has been approved at Jefferson Lab. The search for these particles is motivated by models introduced account a variety experimental observational puzzles: excess in $e^+e^-$ pairs observed multiple nuclear transitions, 4.2$\sigma$ disagreement between experiments standard model prediction muon anomalous magnetic moment,...
Recent observations of the angular correlation spectra in decays $ {\rm ^4He}^*\to ^4He}+ e^+e^-$ and ^8Be}^*\to ^8Be}+ have been suggested as due to creation subsequent decay an electron-positron pair a new light particle with mass $\sim 17$ MeV. In this work, we present calculation invariant $m_{e^+e^-}$ spectrum electromagnetic transition excited state helium estimate differential total width decay. We investigate possibility that source signal is $e^+ e^-$ created by $\rm ^4He$ caused...
Under the assumption that current epoch of Universe is not special, i.e., final state a long history processes in particle physics, cosmological fate $SU(3{)}_{C}\ifmmode\times\else\texttimes\fi{}U(1{)}_{\mathrm{EM}}$ investigated. Spontaneous symmetry breaking $U(1{)}_{\mathrm{EM}}$ at temperature today carried out. The charged scalar field ${\ensuremath{\phi}}_{\mathrm{EM}}$ which breaks found to be ruled out for charge electron, $q=e$. Scalar fields with millicharges are viable and limits...
Diquark formation across a short-range nucleon-nucleon pair is proposed as the underlying QCD physics of correlations (SRC) in nuclei. SRC pairs have been cause distorted quark behavior nuclei; experimentally observed momentum distribution distortions termed EMC effect. The strong spatial overlap brings nucleon constituents within range inter-nucleon potentials and any bonds formed - such diquark bond affects their distributions. In this model, diquarks form $\rm 3_C \otimes \rightarrow...
By utilizing quantum optics techniques, we examine the characteristics of a gravitational wave (GW) signature at interferometers. In particular, study problem by analyzing equations motion GW interacting with an idealized interferometer. Using this method, reconstruct classical signal from representation version almost monochromatic (a single-mode coherent state), then discuss experimental signatures some specific, more general states. We calculate observables that could be used future...