ausblenden:
Schlagwörter:
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Zusammenfassung:
In this talk latest results from the analysis of e ‘e--pairs emitted in Pb+Au collisions
at, 40 AGeV/c and a combined analysis of all data available at 158 AGeV/c are presented.
The enhancement of low-mass e+e - -pairs (mee >0.2 GeV/c2) with respect to the expected
yield from hadron decays first reported at 158 AGeV/c is also found at 40 AGeV/c and is
mm larger t,here. Comparing to various theoretical models based on ~T+x- annihilation,
the data carp only 1x1 reproduced. if the prop&es of the intermediate p in the hot and
:ittilsti !urdium are n~otlificd. Throret icdlly. I he modific~ation is linked to baryon densit>
rdt her ! haI1 rf~rI!iJeI,aturc‘. Cr,l!5tI’:lil?tS from !luth111 dilta t dWl1 ;It thP ‘XliC hP?lIli cwqif5
;iitlerii iliciicate a Ilrt~tAl t~vollitiofl dlolig ki trk3jwI.orv r~f llighrr lxn’riri :lr~l!SiiJ ;~t li!
:1GeV/c. consist,ent with the observed la.rger enhancement factor.