Chaoticity parameter λ in two-pion interferometry in an expanding boson gas model
- Dalian Univ. of Technology, Dalian (China). School of Physics and Optoelectronic Technology
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Physics Division
We investigate the chaoticity parameter λ in two-pion interferometry in an expanding boson gas model. The degree of Bose-Einstein condensation of identical pions, density distributions, and Hanbury-Brown-Twiss (HBT) correlation functions are calculated for the expanding gas within the mean-field description with a harmonic oscillator potential. The results indicate that a sources with thousands of identical pions may exhibit a degree of Bose-Einstein condensation at the temperatures during the hadronic phase in relativistic heavy-ion collisions. This finite condensation may decrease the chaoticity parameter λ in the two-pion interferometry measurements at low pion pair momenta, but influence only slightly the λ value at high pion pair momentum.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1163596
- Journal Information:
- Journal of Physics. G, Nuclear and Particle Physics, Vol. 41, Issue 12; ISSN 0954-3899
- Publisher:
- IOP PublishingCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Effect of pion versus kaon interferometry on the chaotic parameter
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journal | May 2015 |
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