Speaker
Mr
Christopher Plumberg
(The Ohio State University)
Description
HBT (Hanbury-Brown—Twiss) interferometry is an observational technique which plays an essential role in the extraction of the geometric and flow properties of heavy-ion collisions. In particular, azimuthally-sensitive HBT studies convey information about deformations and anisotropies in the structure of the freeze-out surface. One aspect of these studies, which is not at present well understood, is how they are affected by the presence of event-by-event fluctuations in the initial state of the fireball. Such fluctuations may, for instance, contribute to odd Fourier moments of the HBT radii (in Au+Au collisions) which should otherwise vanish by symmetry
In a recent analysis (arXiv:1306.1485) of HBT interferometry with respect to the triangular flow plane, we found, based on Gaussian model studies of the emission function, that triangular oscillations of the HBT radii could result from the build-up of triangular flow in the quark-gluon plasma (QGP) prior to freeze-out. In this talk, we review the key results of this analysis, and discuss ongoing efforts to generalize these results to fully hydrodynamic simulations of heavy-ion collisions on an event-by-event basis. We present our findings for the specific case of Au+Au @ 200 AGeV with identical pion correlations, using 2+1D hydrodynamic code (VISH2+1) with fluctuating initial conditions specified by the Glauber model, and then conclude by comparing our results with recent PHENIX data.
Author
Mr
Christopher Plumberg
(The Ohio State University)
Co-authors
Mr
Chun Shen
(The Ohio State University)
Prof.
Ulrich Heinz
(The Ohio State University)
