title: Charged particle ratio fluctuation as a signal for quark-gluon plasma
abstract: In this Letter we argue that the event-by-event fluctuations of the ratio of the positively charged and the negatively charged pions provide a signal for a quark-gluon plasma. The fact that quarks carry fractional charges is ultimately responsible for this distinct signal.
authors.affiliation: Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
authors.initials: S
authors.lastname: Jeon
authors.initials: V
authors.lastname: Koch