Transverse-longitudinal HBT correlations in proton-antiproton collisions at root(s) = 630 GeV

Details Transverse-longitudinal HBT correlations in proton-antiproton collisions at root(s) = 630 GeV Transverse-longitudinal HBT correlations in proton-antiproton collisions at root(s) = 630 GeV

2006-01-24

arxiv.org/abs/hep-ex/0601039v1

Phys.Lett.B635:280-285,2006

Physics

High Energy Physics

High Energy Physics - Experiment

12 pages, 5 figures, uses elsart.cls

Scientific paper

10.1016/j.physletb.2006.03.015

Correlations of like-sign pion pairs emerging from proton-antiproton collisions are analysed in the two-dimensional (q_L,q_T) decomposition of the three-momentum difference q. While the data cannot be adequately represented by gaussian, exponential, power-law or Edgeworth parametrisations, more elaborate ones such as Levy and an exponential with a cross term do better. A two-scale model using a hard cut to separate small and large scales may indicate a core that is more prolate than the halo. Consideration not only of the interference peak at small (q_L,q_T), but also of the shape of the correlation distribution at intermediate momentum differences is crucial to understanding the data.

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