Publications (22)
Nanoscale heterogeneous dynamics probed by nanosecond x-ray speckle visibility spectroscopy
Yanwen Sun, Gabriella Carini, Matthieu Chollet +15
We report observations of nanosecond nanometer scale heterogeneous dynamics in a free flowing colloidal jet revealed by ultrafast x-ray speckle visibility spectroscopy. The nanosec…
Mechanisms of electron-phonon coupling unraveled in momentum and time: The case of soft-phonons in TiSe
Martin R. Otto, Jan-Hendrik Pöhls, Laurent P. René de Cotret +3
The complex coupling between charge carriers and phonons is responsible for diverse phenomena in condensed matter. We apply ultrafast electron diffuse scattering to unravel electro…
aMCfast: automation of fast NLO computations for PDF fits
Valerio Bertone, Rikkert Frederix, Stefano Frixione +2
We present the interface between MadGraph5_aMC@NLO, a self-contained program that calculates cross sections up to next-to-leading order accuracy in an automated manner, and APPLgri…
Generation of highly mutually coherent hard x-ray pulse pairs with an amplitude-splitting delay line
Haoyuan Li, Yanwen Sun, Joan Vila-Comamala +11
Beam splitters and delay lines are among the key building blocks of modern-day optical laser technologies. Progress in x-ray free electron laser source development and applications…
Speckle correlation as a monitor of X-ray free electron laser induced crystal lattice deformation
Rajan Plumley, Yanwen Sun, Samuel W Teitelbaum +8
X-ray free electron lasers (X-FELs) present new opportunities to study ultrafast lattice dynamics in complex materials. While the unprecedented source brilliance enables high fidel…
Search for Structural Modulations in UPt_3 Using Laue X-ray Diffraction
Brett Ellman, Mark Sutton, Benoit Lussier +3
Using synchrotron radiation-based Laue diffraction methods, we have searched for structural anomalies in a single-crystal whisker of the heavy fermion superconductor UPt_3. Our dat…
Scientific Opportunities with an X-ray Free-Electron Laser Oscillator
Bernhard Adams, Gabriel Aeppli, Thomas Allison +47
An X-ray free-electron laser oscillator (XFELO) is a new type of hard X-ray source that would produce fully coherent pulses with meV bandwidth and stable intensity. The XFELO compl…
Speckle from phase ordering systems
Gregory Brown, Per Arne Rikvold, Mark Sutton +1
The statistical properties of coherent radiation scattered from phase-ordering materials are studied in detail using large-scale computer simulations and analytic arguments. Specif…
Evolution of speckle during spinodal decomposition
Gregory Brown, Per Arne Rikvold, Mark Sutton +1
Time-dependent properties of the speckled intensity patterns created by scattering coherent radiation from materials undergoing spinodal decomposition are investigated by numerical…
A search for heavy Kaluza-Klein electroweak gauge bosons at the LHC
Gideon Bella, Erez Etzion, Noam Hod +3
The feasibility for the observation of a certain leptonic Kaluza-Klein (KK) hard process in {\em pp} interactions at the LHC is presented. Within the TeV extra dim…
Precise Determination of the Strong Coupling Constant from Dijet Cross Sections up to the Multi-TeV Range
Fazila Ahmadova, Daniel Britzger, Xuan Chen +11
We determine the value of the strong coupling and study its running over a wide range of scales as probed by the dijet production process at hadron colliders, based o…
Parton Distribution Functions of the Charged Pion Within The xFitter Framework
Ivan Novikov, Hamed Abdolmaleki, Daniel Britzger +9
We present the first open-source analysis of parton distribution functions (PDFs) of charged pions using xFitter, an open-source QCD fit framework to facilitate PDF extraction and…
Realizing split-pulse x-ray photon correlation spectroscopy to measure ultrafast dynamics in complex matter
Yanwen Sun, Mike Dunne, Paul Fuoss +5
Split-pulse x-ray photon correlation spectroscopy has been proposed as one of the unique capabilities made possible with the x-ray free electron lasers. It enables characterization…
Mapping momentum-dependent electron-phonon coupling and non-equilibrium phonon dynamics with ultrafast electron diffuse scattering
Mark J. Stern, Laurent P. René de Cotret, Martin R. Otto +4
Despite their fundamental role in determining material properties, detailed momentum-dependent information on the strength of electron-phonon and phonon-phonon coupling (EPC and PP…
Ultrafast correlated charge and lattice motion in a hybrid metal halide perovskite
Yang Lan, Benjamin J. Dringoli, David A. Valverde-Chavez +5
Hybrid organic-inorganic halide perovskites have shown remarkable optoelectronic properties (1-3), believed to originate from correlated motion of charge carriers and the polar lat…
Recent constraints on the parton distributions in the proton and the measurement of from ATLAS and CMS
Mark Sutton
Recent results on cross sections sensitive to the parton distribution functions (PDFs) within the proton from the ATLAS and CMS Collaborations are presented. The potential impact o…
Introduction to the MCnet Moses project and Heavy gauge bosons search at the LHC
Gideon Bella, Erez Etzion, Noam Hod +1
This is a technical document that provides supporting information and details of the publicly available code used for the preparation of the analysis for preprint "{\it A search fo…
Dynamics of Nanoscale Phase Decomposition in Laser Ablation
Yanwen Sun, Chaobo Chen, Thies J. Albert +19
Femtosecond laser ablation is a process that bears both fundamental physics interest and has wide industrial applications. For decades, the lack of probes on the relevant time and…
High resolution strain measurements in highly disordered materials
Mark Sutton, J. R. M. Lhermitte, F. Livet +1
The ability to measure small deformations or strains is useful for understanding many aspects of materials. Here, a new analysis of speckle diffraction peaks is presented in which…
Ultrafast Photo-induced Phase Change in SnSe
Benjamin J. Dringoli, Mark Sutton, Zhongzhen Luo +2
Time-resolved multi-terahertz (THz) spectroscopy is used to observe an ultrafast, non-thermal electronic phase change in SnSe driven by interband photoexcitation with 1.55 eV pump…
Time- and momentum-resolved phonon population dynamics with ultrafast electron diffuse scattering
Laurent P. René de Cotret, Jan-Hendrik Pöhls, Mark J. Stern +3
Interactions between the lattice and charge carriers can drive the formation of phases and ordering phenomena that give rise to conventional superconductivity, insulator-to-metal t…
A posteriori inclusion of parton density functions in NLO QCD final-state calculations at hadron colliders: The APPLGRID Project
Tancredi Carli, Dan Clements, Amanda Cooper-Sarkar +5
A method to facilitate the consistent inclusion of cross-section measurements based on complex final-states from HERA, TEVATRON and the LHC in proton parton density function (PDF)…