منابع مشابه
HBT Shape Analysis with q-Cumulants
Taking up and extending earlier suggestions, we show how twoand three-dimensional shapes of secondorder 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. Cumul...
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In this paper we investigate a possibility to perform shape-sensitive HBT analysis in transversal plane. We study presently used Side-Out decomposition of the correlation function and we do not find it to be very sensitive for the detection of a shape of source distribution in transversal plane. Therefore we suggest to use X-Y decomposition of the correlation function for the HBT analysis of no...
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The q-semicircular distribution is a probability law that interpolates between the Gaussian law and the semicircular law. There is a combinatorial interpretation of its moments in terms of matchings where q follows the number of crossings, whereas for the free cumulants one has to restrict the enumeration to connected matchings. The purpose of this article is to describe combinatorial propertie...
متن کاملLarge-q expansion of the energy cumulants for the two-dimensional q-state Potts model
We have calculated the large-q expansion for the energy cumulants at the phase transition point in the two-dimensional q-state Potts model to the 23rd order in 1/ √ q using the finite lattice method. The obtained series allow us to give very precise estimates of the cumulants for q > 4 on the first order transition point. The result confirm us the correctness of the conjecture by Bhattacharya e...
متن کاملQ-MAF Shape Decomposition
This paper address the problems of generating a low dimensional representation of the shape variation present in a set of shapes represented by a number of landmark points. First, we will present alternatives to the featured Least-Squares Procrustes alignment based on the L∞-norm and the L1-norm. Second, we will define a new shape decomposition based on the Maximum Autocorrelation Factor (MAF) ...
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ژورنال
عنوان ژورنال: Brazilian Journal of Physics
سال: 2007
ISSN: 0103-9733
DOI: 10.1590/s0103-97332007000600004