1. Forward and midrapidity like-particle ratios from collisions at
- Author
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Bearden, I.G., Beavis, D., Besliu, C., Budick, B., Bøggild, H., Chasman, C., Christensen, C.H., Christiansen, P., Cibor, J., Debbe, R., Enger, E., Gaardhøje, J.J., Germinario, M., Hagel, K., Holm, A., Holme, A.K., Ito, H., Jakobsen, E., Jipa, A., and Jundt, F.
- Subjects
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BARYONS , *PARTICLES (Nuclear physics) , *NUCLEAR physics , *PROTONS , *FERMIONS - Abstract
Abstract: We present a measurement of , and from collisions at over the rapidity range . For we see no significant transverse momentum dependence of the ratios. All three ratios are independent of rapidity for and then steadily decline from to . The ratio is below unity for . The ratio is very similar for and 20% central Au+Au collisions at all rapidities. In the fragmentation region the three ratios seem to be independent of beam energy when viewed from the rest frame of one of the protons. Theoretical models based on quark–diquark breaking mechanisms overestimate the ratio up to . Including additional mechanisms for baryon number transport such as baryon junctions leads to a better description of the data. [Copyright &y& Elsevier]
- Published
- 2005
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