Correlations in transverse momentum in pion-proton and kaon-proton collisions at 250 GeV/c

Physics – High Energy Physics – High Energy Physics - Experiment

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Talk presented at the 7th Workshop on Multiparticle Production ``Correlations and Fluctuations'', Nijmegen, The Netherlands, 3

Scientific paper

We have measured the second-order normalized differential factorial moments as a function of the difference of transverse momentum ($\Delta p_T$) in $\p^+ p$ and $K^+ p$ collisions at 250 GeV/$c$. The second-order differential factorial moments for like-charged pairs reveal a strong increase with decreasing $\Delta p_T$. In a small central rapidity window this increase is described by a simple power law. Such a behavior, if interpreted as originating from Bose-Einstein correlations, may indicate a structure of the transverse spatial distribution of the source similar to that recently predicted by Bia\l{}as and Peschanski for color-dipole emission in onium-onium scattering. The power of the rise obtained in the fit agrees with the predicted value.

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