Lambda Hyperons in 2 A*GeV Ni + Cu Collisions
Nuclear Experiment
2011-09-12 v2
Abstract
A sample of Lambda's produced in 2 A*GeV Ni + Cu collisions has been obtained with the EOS Time Projection Chamber at the Bevalac. Low background in the invariant mass distribution allows for the unambiguous demonstration of Lambda directed flow. The transverse mass spectrum at mid-rapidity has the characteristic shoulder-arm shape of particles undergoing radial transverse expansion. A linear dependence of Lambda multiplicity on impact parameter is observed, from which a total Lambda + Sigma^0 production cross section of $112 +/- 24 mb is deduced. Detailed comparisons with the ARC and RVUU models are made.
Keywords
Cite
@article{arxiv.nucl-ex/9708005,
title = {Lambda Hyperons in 2 A*GeV Ni + Cu Collisions},
author = {EOS Collaboration and M. Justice and S. Albergo and F. Bieser and F. P. Brady and Z. Caccia and D. A. Cebra and A. D. Chacon and J. L. Chance and Y. Choi and S. Costa and J. B. Elliott and M. L. Gilkes and J. A. Hauger and A. S. Hirsch and E. L. Hjort and A. Insolia and D. Keane and J. C. Kintner and M. A. Lisa and H. Liu and H. S. Matis and R. McGrath and M. McMahan and C. McParland and D. L. Olson and M. D. Partlan and N. T. Porile and R. Potenza and G. Rai and J. O. Rasmussen and H. G. Ritter and J. Romanski and J. L. Romero and G. V. Russo and R. P. Scharenberg and A. Scott and Y. Shao and B. K. Srivastava and T. J. M. Symons and M. Tincknell and C. Tuve and S. Wang and P. G. Warren and D. Weerasundara and H. H. Wieman and T. Wienold and K. Wolf},
journal= {arXiv preprint arXiv:nucl-ex/9708005},
year = {2011}
}
Comments
Revised version accepted for publication in Phys. Lett. B