HBT shape analysis with q -cumulants
AUTOR(ES)
Eggers, H. C., Lipa, P.
FONTE
Brazilian Journal of Physics
DATA DE PUBLICAÇÃO
2007-09
RESUMO
Taking up and extending earlier suggestions, we show how two- and three-dimensional 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.
