HBT shape analysis with q-cumulants

Details HBT shape analysis with q-cumulants HBT shape analysis with q-cumulants

2006-11-30

arxiv.org/abs/nucl-th/0611105v2

Braz.J.Phys.37:877-884,2007

Physics

Nuclear Physics

Nuclear Theory

8 pages, 6 figures for a total of 29 subfigs, revtex4. Typos corrected, three missing terms added, minor text changes

Scientific paper

10.1590/S0103-97332007000600004

Taking up and extending earlier suggestions, we show how two- and threedimensional shapes of second-order HBT correlations can be described in a multivariate Edgeworth expansion around gaussian ellipsoids, with expansion coefficients, identified as the cumulants of pair momentum difference q, acting as shape parameters. Off-diagonal terms dominate both the character and magnitude of shapes. Cumulants can be measured directly and so the shape analysis has no need for fitting.

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