Antilambda production in Au+Au collisions at 11.7 A GeV/c

E917 Collaboration: B. B. Back , R. R. Betts , J. Chang , W. C. Chang , C. Y. Chi , Y. Y. Chu , J. B. Cumming , J. C. Dunlop

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W. Eldredge S. Y. Fung R. Ganz E. Garcia-Solis A. Gillitzer G. Heinzelman 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. K. Seto P. J. Stanskas G. S. F. Stephans H. Wang F. L. H. Wolfs A. H. Wuosmaa H. Xiang G. H. Xu H. B. Yao C. M. Zou

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keywords collisionsantilambdaantiprotoncentralperipheralproductioncurrente917

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We present results from Experiment E917 for antilambda and antiproton production in Au+Au collisions at 11.7 A GeV. We have measured invariant spectra and yields for both species in central and peripheral collisions. We find that the antilambda/antiproton ratio near mid-rapidity increases from 0.26+0.19-0.15 in peripheral collisions to 3.6+4.7-1.8 in central collisions, a value that is substantially larger than current theoretical estimates.

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Antilambda production in Au+Au collisions at 11.7 A GeV/c

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