Antideuteron yield at the AGS and coalescence implications
Nuclear Experiment
2012-08-27 v1
Abstract
We present Experiment 864's measurement of invariant antideuteron yields in 11.5A GeV/c Au + Pt collisions. The analysis includes 250 million triggers representing 14 billion 10% central interactions sampled for events with high mass candidates. We find (1/2 pi pt) d^(2)N/dydpt = 3.5 +/- 1.5 (stat.) +0.9,-0.5 (sys.) x 10^(-8) GeV^(-2)c^(2) for 1.8<y<2.2, <pt>=0.35 GeV/c (y(cm)=1.6) and 3.7 +/- 2.7 (stat.) +1.4,-1.5 (sys.) x 10^(-8) GeV^(-2)c^(2) for 1.4<y<1.8, <pt>=0.26 GeV/c, and a coalescence parameter B2-bar of 4.1 +/- 2.9 (stat.) +2.3,-2.4 (sys.) x 10^(-3) GeV^(2)c^(-3). Implications for the coalescence model and antimatter annihilation are discussed.
Keywords
Cite
@article{arxiv.nucl-ex/0005001,
title = {Antideuteron yield at the AGS and coalescence implications},
author = {E864 Collaboration},
journal= {arXiv preprint arXiv:nucl-ex/0005001},
year = {2012}
}
Comments
8 pages, 4 figures, Latex, submitted to Phys. Rev. Lett