Chaoticity parameter λ in two-pion interferometry in an expanding boson gas model

Liu, Jie; Ru, Peng; Zhang, Wei-Ning; Wong, Cheuk-Yin

doi:10.1088/0954-3899/41/12/125101

Chaoticity parameter λ in two-pion interferometry in an expanding boson gas model

Journal Article · Wed Oct 15 04:00:00 EDT 2014 · Journal of Physics. G, Nuclear and Particle Physics

DOI:https://doi.org/10.1088/0954-3899/41/12/125101· OSTI ID:1163596

Liu, Jie ^[1]; Ru, Peng ^[1]; Zhang, Wei-Ning ^[1]; Wong, Cheuk-Yin ^[2]

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.

View Accepted Manuscript (DOE)

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

Alternate ID(s):: OSTI ID: 22329664

Journal Information:: Journal of Physics. G, Nuclear and Particle Physics, Journal Name: Journal of Physics. G, Nuclear and Particle Physics Journal Issue: 12 Vol. 41; ISSN 0954-3899

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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