Transverse momentum fluctuations in nuclear collisions at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mn>158</mml:mn><mml:mi>A</mml:mi><mml:mspace width="0.3em" /><mml:mi mathvariant="normal">GeV</mml:mi></mml:mrow></mml:math>

Results are presented on event-by-event fluctuations in transverse momentum of charged particles, produced at forward rapidities in p+p, C+C, Si+Si, and Pb+Pb collisions at 158AGeV. Three different characteristics are discussed: the average transverse momentum of the event, the ΦpT fluctuation measure, and two-particle transverse momentum correlations. In the kinematic region explored, the dynamical fluctuations are found to be small. However, a...