Date: Tuesday, March 11, 2014 - 3:30pm
Perturbative QCD is a powerful tool for calculating the properties of jets at the LHC. However, there are many jet observables for which non-perturbative input from QCD is needed. In this talk, I present three case studies at the boundary between perturbative and non-perturbative QCD---ratio observables, track-based measurements, and hadronization effects---all of which are relevant for new physics searches at the LHC.
Date: Tuesday, March 18, 2014 - 3:30pm
Hadronic many-body theory predicts a strong broadening of the rho-meson spectral
function in hot and dense matter, leading to a melting of its resonance structure
as the pseudo-critical temperature is approached from below. Pertinent calculations
of thermal dilepton spectra in heavy-ion collisions, which additionally include
radiation from the quark-gluon plasma phase, are largely consistent with experimental
measurements which now cover a rather large range of collision energies, from SPS to
Date: Tuesday, March 25, 2014 - 3:30pm
It is shown that the acoustic scaling patterns of anisotropic flow for different event shapes at a fixed collision centrality (shape-engineered events), provide robust constraints for the event-by-event fluctuations in the initial-state density distribution from ultrarelativistic heavy ion collisions. The empirical scaling parameters also provide a dual-path method for extracting the specific shear viscosity eta/s of the quark-gluon plasma (QGP) produced in these collisions.
Date: Tuesday, April 1, 2014 - 1:30pm
I will report a complete lattice calculation of the quark and glue components of the proton momentum and angular momenta. Preliminary results on the quark spin contribution from the anomalous Ward identity will also be reported. Hadron mass can be decomposed in terms of the quark kinetic energy, quark condensate, glue component and the trace anomaly. Results of such a division for the pseudoscalar and vector mesons from light to charm quarks will be presented.
Date: Thursday, April 10, 2014 - 3:30pm
Date: Tuesday, April 15, 2014 - 1:30pm