E864
E*D3N/D3P
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E864: Experimental results on exotic nuclei and rare probes

The E864 collaboration Nagle, J.L. ;
Nucl.Phys.A 661 (1999) 185-190, 1999.
Inspire Record 503979 DOI 10.17182/hepdata.36100

Experiment 864 at the BNL-AGS was designed to search for exotic states of strange quark matter and other rare composite particles. The experiment was commissioned in 1994 and completed its final run in 1998. Here, we present an overview of the experimental results for the production of light nuclei up to A=7, antiprotons and antideuterons, hypernuclei and production limits on new states of quark matter.

1 data table
Table 1

No description provided.


Anti-deuteron yield and coalescence implications at the AGS

The E864 collaboration Van Buren, G. ;
Nucl.Phys.A 661 (1999) 391-394, 1999.
Inspire Record 514769 DOI 10.17182/hepdata.36101

We present the preliminary results of Experiment 864's search for antideuterons in 11.5 GeV/c per nucleon Au + Pt collisions at the AGS. The data represents 14 billion 10% central interactions selectively triggered for events with high mass candidates. Antideuteron invariant yields are found to be 3.5 ± 1.5( stat. ) +0.9 −0.5 ( sys. ) × 10 −8 GeV −2 c 2 in the rapidity range between y = 1.8 and 2.2 ( y cm = 1.6) for 〈 p t 〉= 0.35 GeV/c and 3.7±2.7( stat. ) +1.4 −1.5 ( sys. ) × 10 −8 GeV −2 c 2 between rapidities y = 1.4 and 1.8 at 〈 p t 〉= 0.26 GeV/c. These yields, along with E864 antiproton measurements, lead to a most probable value for the coalescence factor B 2 of 4.1 ± 2.9( stat. ) +2.3 −2.4 ( sys. ) × 10 −3 GeV −2 c 3 after correcting antiproton yields for antihyperon feeddown contributions. Implications for the coalescence model and antimatter annihilation from an antideuteron measurement are also discussed.

2 data tables
Table 1

No description provided.

Table 2

PRELIMINARY DATA.