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20 April 2024

» pubmed » pmid11736497

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Antilambda production in Au+Au collisions at 11.7A GeV/c
B B Back ; R R Betts ; J Chang ; W C Chang ; C Y Chi ; Y Y Chu ; J B Cumming ; J C Dunlop ; W Eldredge ; S Y Fung ; R Ganz ; E Garcia ; A Gillitzer ; G Heintzelman ; W F Henning ; D J Hofman ; B Holzman ; J H Kang ; E J Kim ; S Y Kim ; Y Kwon ; D McLeod ; A C Mignerey ; M Moulson ; V Nanal ; C A Ogilvie ; R Pak ; A Ruangma ; D E Russ ; R Seto ; P J Stanskas ; G S Stephans ; H Wang ; F L Wolfs ; A H Wuosmaa ; H Xiang ; G H Xu ; H B Yao ; C M Zou ; ;
Date:	10 Dec 2001
Journal:	Phys Rev Lett, 87 (24), 242301
Abstract:	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(Lambda;)/dy = 1.2(+0.7+0.2)(-0.6-0.2)x10(-3) in peripheral collisions to 19(+4+3)(-5-2)x10(-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 Lambda/p ratio near midrapidity increases from 0.26(+0.19+0.5)(-0.15-0.4) in peripheral collisions to 3.6(+4.7+2.7)(-1.8-1.1) in central collisions, a value larger than current theoretical estimates.
Source:	PubMed, pmid11736497
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