Abstract
We present the first large-acceptance measurement of event-wise mean transverse momentum ?pt? fluctuations for Au-Au collisions at nucleon-nucleon center-of-momentum collision energy sNN = 130 GeV. The observed nonstatistical ?pt?fluctuations substantially exceed in magnitude fluctuations expected from the finite number of particles produced in a typical collision. The r.m.s. fractional width excess of the event-wise ?pt?distribution is 13.7±0.1(stat) ±1.3(syst)% relative to a statistical reference, for the 15% most-central collisions and for charged hadrons within pseudorapidity range |η|