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Anti-flow of K⁰_s Mesons in 6 AGeV Au + Au Collisions

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arxiv nucl-ex/0101003 v1 pith:ZENPJBSZ submitted 2001-01-06 nucl-ex

Anti-flow of K⁰_s Mesons in 6 AGeV Au + Au Collisions

classification nucl-ex
keywords agevanti-flowcollisionsmattermesonsnuclearcentralcross
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We have measured the sideward flow of neutral strange ($K^0_s$) mesons in 6 AGeV Au + Au collisions. A prominent anti-flow signal is observed for an impact parameter range (b $\lesssim 7$ fm) which spans central and mid-central 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.

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