Target dependence of proton source sizes at 14.6 A (center dot) GeV/c

摘要

Relative-momentum correlations have been measured for pairs of protons from central collisions of 14.6 A-GeV/c (sup 28)Si with (sup 27)Al, (sup 107)Ag, and (sup 197)Au nuclei. The protons were detected in a region centered near a laboratory rapidity of 1.2. Theoretical correlation functions are convoluted with the spectrometer response function and fitted to the data to derive the source volume. The fitted radii are corrected for small relativistic effects. The extracted volumes are consistent with a crude geometrical overlap model and depart from (pi) - (pi) and K-K data trends which suggest a source size closer to that of the projectile.