X-ray free-electron lasers (FELs) are promising tools for structural determination of macromolecules via coherent x-ray scattering. During ultrashort and ultraintense x-ray pulses with an atomic-scale wavelength, samples are subject to radiation damage and possibly become highly ionized, which may influence the quality of x-ray scattering patterns. We develop a toolkit to treat detailed ionizat...

The basic theoretical ideas of the handbag mechanism for wide-angle exclusive scattering reactions are discussed and, with regard to the present experimental program carried out at JLab, its application to Compton scattering is reviewed in some detail. Results for other wide-angle reactions such as two-photon annihilations into pairs of hadrons or virtual Compton scattering are presented as well.

Coherent photon-emitter interfaces offer a way to mediate efficient nonlinear photon-photon interactions, much needed for quantum information processing. Here we experimentally study the case of two-level emitter, dot, coupled single optical mode in nanophotonic waveguide. We carry out few-photon transport experiments and record statistics light reconstruct scattering matrix elements 1- 2-photo...

For the H1 and ZEUS Collaborations Recent results of real and virtual photon structure from the H1 and ZEUS collaborations are discussed. Jet cross-sections in photoproduction processes provide new constraints on the real photon parton densities. Measurements of dijet cross-sections in deep-inelastic scattering show clear evidence for a resolved component to the virtual photon which is suppress...

Previous calculations of photon-neutrino scattering in a constant background magnetic field are extended and corrected.

Two–photon exchange and elastic scattering of electrons/positrons on the proton.

Laser speckle contrast imaging (LSCI) is a powerful and simple method for full field imaging of blood flow. However, the depth dependence and the degree of multiple scattering have not been thoroughly investigated. We employ three-dimensional Monte Carlo simulations of photon propagation combined with high resolution vascular anatomy to investigate these two issues. We found that 95% of the det...

We present a unified view of the frequency dependence of the various scattering processes involved when a neutral hydrogen atom interacts with a monochromatic, linearly-polarized photon. A computational approach is employed of the atom trapped by a finite-sized-box due to a finite basis-set expansion, which generates a set of transition matrix elements between E < 0 eigenstates and E > 0 pseudo...

In vivo vibrational spectroscopic imaging is inhibited by relatively slow spectral acquisition on the second scale and low photon collection efficiency for a highly scattering system. Recently developed multiplex coherent anti-Stokes Raman scattering and stimulated Raman scattering techniques have improved the spectral acquisition time down to microsecond scale. These methods using a spectromet...

2 of the photon to the lowest values of x yet, where the hadronic component of the photon is most important. Inclusive cross sections for D-mesons have been measured as a function of their transverse momenta and are used to test the validity of perturbative QCD in NLO in this region. The total charm quark production cross section is extracted. For the first time the inclusive production of D me...