Examination of scaling of Hanbury-Brown--Twiss radii with charged particle multiplicity

Details Examination of scaling of Hanbury-Brown--Twiss radii with charged particle multiplicity Examination of scaling of Hanbury-Brown--Twiss radii with charged particle multiplicity

2012-03-19

arxiv.org/abs/1203.4071v2

Phys.Rev.C85:044901,2012

Physics

Nuclear Physics

Nuclear Theory

11 pages, 4 figures, updated references

Scientific paper

10.1103/PhysRevC.85.044901

In the light of the recent LHC data on proton-proton and lead-lead collisions we examine the question of the multiplicity scaling of HBT radii in relativistic nuclei and particle interactions. Within the UrQMD transport approach we study a large variety of system sizes at different beam energies and extract the HBT radii. In the calculation, we find a good scaling of the radii as a function of charged particle multiplicity, if the change in the multiplicity is caused by a change of centrality at the same energy. However, the scaling is only approximate when the energy, $\sqrt{s}$, is changed and breaks down when comparing pp to AA reactions.

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