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Controlling the carrier-envelope phase of ultrashort light pulses with optical parametric amplifiers.
A white-light seeded optical parametric amplifier is suggested as a self-stabilized source of few-cycle pulses, in which the phase of the electric field is exactly reproduced in each laser shot.
Charged-particle distributions in √s=13 TeV pp interactions measured with the ATLAS detector at the LHC
Measurements of Zγ and Zγγ production in pp collisions at s =8 TeV with the ATLAS detector
The production of Z bosons with one or two isolated high-energy photons is studied using pp collisions at s √ =8 TeV . The analyses use a data sample with an integrated luminosity of 20.3 fb −1…
Real-time spectroscopy of transition states in bacteriorhodopsin during retinal isomerization
The direct observation of nuclear motion in a complex biological system, the retinal chromophore of bacteriorhodopsin (bR568), as it undergoes the trans–cis photoisomerization that is fundamental to the vision process is reported.
Visible pulse compression to 4 fs by optical parametric amplification and programmable dispersion control.
Angular dispersion of pump frequencies is shown to be an efficient mechanism for bandwidth enhancement in a noncollinear optical parametric amplifier and feedback for an iterative computer-controlled dispersion compensation algorithm is based on pulse characterization by second-harmonic generation frequency-resolved optical gating.
Carrier-envelope-phase-stable, 1.2 mJ, 1.5 cycle laser pulses at 2.1 μm.
It is shown that a chirped periodically poled lithium niobate crystal is used to generate the ultrabroad spectrum needed for a 1.5 cycle pulse through difference frequency mixing of spectrally broadened pulse from a Ti:sapphire amplifier.
Sub-5 fs pulse generation from a noncollinear optical parametric amplifier
Transform-limited visible pulses with as short as sub-4 fs duration have been generated for the first time by several improvements made to our previous noncollinear optical parametric amplifier…
Measurement of differential J/ψ production cross sections and forward-backward ratios in p + Pb collisions with the ATLAS detector
Measurements of differential cross sections for J/psi production in p + Pb collisions at root S-NN= 5.02 TeV at the CERN Large Hadron Collider with the ATLAS detector are presented. The data set us…
A Particle Consistent with the Higgs Boson Observed with the ATLAS Detector at the Large Hadron Collider
The ATLAS experiment at the Large Hadron Collider at CERN has observed the production of a new particle with a mass of 126 giga–electron volts and decay signatures consistent with those expected for the Higgs particle, strong support for the standard model of particle physics, including the presence of this vacuum field.
Search for dark matter in association with a Higgs boson decaying to two photons at s=13 TeV with the ATLAS detector
A search for dark matter in association with a Higgs boson decaying to two photons is presented. This study is based on data collected with the ATLAS detector, corresponding to an integrated lumino…