Nuclear Coulomb Field Effects in Two-Pion Bose-Einstein Correlations
Differences are investigated in pion source sizes derived using {pi}{sup +}{pi}{sup +} and {pi}{sup -}{pi}{sup -} pairs in the large statistics data set collected with the E866 Forward Spectrometer for central Au+Au collisions at 11.6 A. {center_dot} GeV/c in AGS Experiment E866. These differences in source radii are interpreted using a simple classical description for the Coulomb and the transverse-momentum (p{sub T}) dependent source radius parameters. An estimated effective net charge responsible for the distortion is considerably smaller than the expected total projectile participant protons, which suggests that the system undergoes a rapid expansion in the longitudinal direction before freezeout. This picture is consistent with the results derived from the {pi}{sup -}/{pi}{sup +} singles yield ratios for the same reactions.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC02-98CH10886
- OSTI ID:
- 770819
- Report Number(s):
- BNL-66647; R&D Project: PO-3; KB-02-01; TRN: US0407157
- Resource Relation:
- Conference: Relativistic Heavy Ion Mini-Symposium at the APS Centennial Meeting, Atlanta, GA (US), 03/21/1999--03/25/1999; Other Information: PBD: 21 Mar 1999
- Country of Publication:
- United States
- Language:
- English
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