Experimental Status
No modification of ƒÖ mass or width is reported.
At SPS, inverse slope parameter (Tinv) is larger in the detection of 2K modes(NA49) than that in di-lepton mode(NA40).
NA40: The ą/(ĉ+č) ratio increase up to 1 in the most central bin.
NA49: The ą/<Ĉ> ratio is a factor of 3-5 larger in Pb+Pb compared to pp interactons at the same energy.