Tilted Pion Sources and Azimuthal Dependence of HBT Radii
Extracting & summarizing source information
Space-time interpretation of R2ij for cylindrically symmetric sources
The next challenge — f-dependent interferometry
Connecting the BP correlations to the source in its natural frame
Constraints on implicit f-dependence Smn(f)
Neglecting implicit f-dependence
Neglecting implicit f-dependence, and focussing on ycm
Simple case - ellipsoidal source w/ no flow
Adding longitudinal flow
RQMD@AGS: “Single-pion tilts” (effective source tilts bigger)
Opposing average tilts in p, x and the physics of p flow
RQMD w/ meanfield: Au(2GeV)Au, b=2-8 fm, pT MeV/c
Prolate/oblate sources and large/small tilts
Smn measures Gaussian curvature in b-fixed Cartesian system...
…but source is tilted in this system + has longitudinal flow effects.
Preliminary E895 DATA
Rough idea of extracted shapes of average effective source “to scale”
Summary
Tilts at RHIC? Theoretically, and experimentally, “challenging”
PPT Slide
Constraints on Smn(f)
First Harmonics at Midrapidity?? - Ain’t that Impossible? Is “up” different than “down”?
Howd’ja get more f-bins?
Email: lisa@mps.ohio-state.edu
Home Page: http://vdgus1.mps.ohio-state.edu/~lisa