Back to Search
Start Over
Identical pion intensity interferometry in central Au+Au collisions at 1.23A GeV
- Publication Year :
- 2018
-
Abstract
- We investigate identical pion HBT intensity interferometry for central Au+Au collisions at 1.23A GeV. High-statistics $\pi^-\pi^-$ and $\pi^+\pi^+$ data are measured with HADES at SIS18/GSI. The radius parameters, derived from the correlation function depending on relative momenta in the longitudinal-comoving system and parametrized as three-dimensional Gaussian distribution, are studied as function of transverse momentum. A substantial charge-sign difference of the source radii is found, particularly pronounced at low transverse momentum. The extracted Coulomb-corrected source parameters agree well with a smooth extrapolation of the center-of-mass energy dependence established at higher energies, extending the corresponding excitation functions down towards a very low energy. Our data would thus rather disfavour any strong energy dependence of the radius parameters in the low energy region.<br />Comment: 7 pages, 5 figures, updated author and grant lists
- Subjects :
- Nuclear Experiment
Subjects
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.1811.06213
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1016/j.physletb.2019.06.047