Recent data point in the direction of a cosmological constant dominated universe. We investigate the role of supersymmetric QCD with (Formula presented) as a possible candidate for a dynamical cosmological constant (“quintessence”). When (Formula presented) the multiscalar dynamics is fully taken into account, showing that a certain degree of flavor symmetry in the initial conditions is necessary in order to attain the required late-time “tracking” attractor behavior. A possible solution to the problem of long-range interactions of gravitational strength is proposed. Finally we show how, as a consequence of the interaction with the standard model fields, the early cosmological evolution of the scalar fields may be dramatically altered, and the approach to the tracking behavior may become much more efficient. © 1999 The American Physical Society.
SUSY QCD and Quintessence
MASIERO, ANTONIO;ROSATI, FRANCESCA
2000
Abstract
Recent data point in the direction of a cosmological constant dominated universe. We investigate the role of supersymmetric QCD with (Formula presented) as a possible candidate for a dynamical cosmological constant (“quintessence”). When (Formula presented) the multiscalar dynamics is fully taken into account, showing that a certain degree of flavor symmetry in the initial conditions is necessary in order to attain the required late-time “tracking” attractor behavior. A possible solution to the problem of long-range interactions of gravitational strength is proposed. Finally we show how, as a consequence of the interaction with the standard model fields, the early cosmological evolution of the scalar fields may be dramatically altered, and the approach to the tracking behavior may become much more efficient. © 1999 The American Physical Society.
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