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Near-threshold production of the multistrange Xi- hyperon |
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| Authors: | Chung P Ajitanand N N Alexander J M Anderson M Best D Brady F P Case T Caskey W Cebra D Chance J L Cole B Crowe K Das A C Draper J E Gilkes M L Gushue S Heffner M Hirsch A S Hjort E L Holzmann W Huo L Issah M Justice M Kaplan M Keane D Kintner J C Klay J Krofcheck D Lacey R A Lauret J Lisa M A Liu H Liu Y M Milan J McGrath R Milosevich Z Odyniec G Olson D L Panitkin S Porile N T Rai G Ritter H G Romero J L Scharenberg R Srivastava B Stone N T B Symons T J M Taranenko A Whitfield J Wienold T Witt R Wood L Zhang W N Oeschler H;E Collaboration |
| Institution: | Departments of Chemistry and Physics, SUNY at Stony Brook, New York 11794-3400, USA. |
| Abstract: | The yield for the multistrange Xi(-) hyperon has been measured in 6A GeV Au+Au collisions via reconstruction of its decay products pi(-) and Lambda, the latter also being reconstructed from its daughter tracks of pi(-) and p. The measurement is rather close to the threshold for Xi(-) production and therefore provides an important test of model predictions. The measured yield for Xi(-) and Lambda are compared for several centralities. In central collisions the Xi(-) yield is found to be in excellent agreement with statistical and transport model predictions, suggesting that multistrange hadron production approaches chemical equilibrium in high baryon density nuclear matter. |
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