Proton-Λ [Proton - lambda] correlations in central Pb + Pb collisions at √sNN [square root of s subscript NN] =17.3 GeV
The momentum correlation between protons and Λ [lambda] particles emitted from central Pb+Pb collisions at √sNN=17.3 [square root of s subscript NN = 17.3] GeV was studied by the NA49 experiment at the CERN Super Proton Synchrotron. A clear enhancement is observed for small relative momenta (qinv<...
| Main Authors: | , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
American Physical Society
2011
|
| Online Access: | http://hdl.handle.net/1721.1/66175 https://orcid.org/0000-0001-8983-2169 |
| Summary: | The momentum correlation between protons and Λ [lambda] particles emitted from central Pb+Pb collisions at √sNN=17.3 [square root of s subscript NN = 17.3] GeV was studied by the NA49 experiment at the CERN Super Proton Synchrotron. A clear enhancement is observed for small relative momenta (qinv<0.2 [q subscript inv <0.2] GeV). By fitting a theoretical model, which uses the strong interaction between the proton and the Λ [lambda] in a given pair, to the measured data, a value for the effective source size is deduced. Assuming a static Gaussian source distribution, we derive an effective radius parameter of RG=3.02±0.20(stat.)-0.16+0.44(syst.) [RG = 3.02±0.20 (stat.) subscript -0.16 superscript +0.44 (syst.)] fm. |
|---|