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Ahle, L; Akiba, Y; Ashktorab, K; Baker, M.D; Beavis, D; Budick, B; Chang, J; Chasman, C; Chen, Z; Chu, Y.Y; Chujo, T; Cumming, J; Debbe, R; Dunlop, J.C; Eldredge, W; Fleming, K; Fung, S.-Y; Garcia, E; Gushue, S; Hamagaki, H; Hayano, R; Heintzelman, G.H; Kang, J.H; Kim, E.J; Kumagai, A; Kurita, K; Lee, J.H; Lee, Y.K; Miake, Y; Mignerey, A.C; Moulson, M; Muentz, C; Nagano, K; Ogilvie, C.A; Olness, J; Oyama, K; Remsberg, L; Sako, H; Seto, R; Shea, J; Shigaki, K; Steadman, S.G; Stephans, G.S.F; Tamagawa, T; Tannenbaum, M.J; Ueno-Hayashi, S; Videbaek, F; Xiang, H; Wang, F; Yagi, K; Zhu, F; Back, B.B; Betts, R.R; Chang, W.C; Chi, C.Y; Cumming, J.B; Fung, S.Y; Ganz, R; Gillitzer, A; Henning, W.F; Hofman, D.J; Holzman, B; Kim, S.Y; Kwon, Y; McLeod, D; Nanal, V; Ogilvie, C.A; Pak, R; Ruangma, A; Russ, D; Stanskas, P.J; Wang, H; Wolfs, F.L.H; Wuosmaa, A.H; Xu, G.H; Yao, H.B; Zou, C.M
Physics letters. B, 09/2000, Volume: 490, Issue: 1Journal Article
Mid-rapidity spectra and yields of K − and K + have been measured for Au+Au collisions at 4, 6, 8, and 10.7 AGeV. The K − yield increases faster with beam energy than for K + and hence the K −/K + ratio increases with beam energy. This ratio is studied as a function of both s and s − s th which allows the direct comparison of the kaon yields with respect to the production threshold in p+p reactions. For equal s − s th the measured ratio K −/K +=0.2 at energies above threshold in contrast to the K −/K + ratio of near unity observed at energies below threshold. The use of the K −/K + ratio to test the predicted changes of kaon properties in dense nuclear matter is discussed.
