Antilambda production in Au+Au collisions at 11.7 A{center_dot}GeV/c.
Journal Article
·
· Phys. Rev. Lett.
We present results for antilambda and antiproton production in Au+Au collisions at 11.7 A GeV/c including spectra and extracted invariant yields for both species in central and peripheral collisions in the rapidity range 1.0<y<1.4. The antilambda yield increases from dN{bar {lambda}} /dy = 1.2{sub -0.6-0.2}{sup +0.7+0.2}x10{sup -3} in peripheral collisions to 19{sub -5-2}{sup +4+3}x10{sup -3} in central collisions. The direct antiproton yield is deduced from the measured total antiproton spectra to extract the ratio of antilambda-to-direct-antiproton production. The {bar {lambda}} /{bar p} ratio near midrapidity increases from 0.26{sub -0.15-0.4}{sup +0.19+0.5} in peripheral collisions to 3.6{sub -1.8-1.1}{sup +4.7+2.7} in central collisions, a value larger than current theoretical estimates.
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- SC; NSF; FOR
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 949412
- Report Number(s):
- ANL/PHY/JA-40709
- Journal Information:
- Phys. Rev. Lett., Journal Name: Phys. Rev. Lett. Journal Issue: 24 ; Dec. 10, 2001 Vol. 87; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- ENGLISH
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