Antiflow of K(0)(s) mesons in 6A GeV Au + Au collisions
/ Authors
P. Chung, N. Ajitanand, J. Alexander, M. Anderson, D. Best, F. Brady, T. Case, W. Caskey, D. Cebra, J. Chance
and 41 more authors
B. Cole, K. Crowe, A. Das, J. Draper, M. Gilkes, S. Gushue, M. Heffner, A. Hirsch, E. Hjort, L. Huo, M. Justice, M. Kaplan, D. Keane, J. Kintner, J. Klay, D. Krofcheck, R. Lacey, J. Lauret, M. Lisa, H. Liu, Y. Liu, R. McGrath, Z. Milosevich, G. Odyniec, D. Olson, S. Panitkin, C. Pinkenburg, N. Porile, G. Rai, H. Ritter, J. Romero, R. Scharenberg, L. Schroeder, B. Srivastava, N. Stone, T. Symons, T. Wienold, R. Witt, J. Whitfield, L. Wood, W. N. Zhang
/ Abstract
We have measured the sideward flow of neutral strange ( K(0)(s)) mesons in 6A GeV Au+Au collisions. A prominent antiflow signal is observed for an impact parameter range ( b less, similar7 fm) which spans central and midcentral events. Since the K(0)(s) scattering cross section is relatively small in nuclear matter, this observation suggests that the in-medium kaon vector potential plays an important role in high density nuclear matter.
Journal: Physical Review Letters