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We derive closed expressions for the universal weak localization peak of theaverage conductance peak heights in Coulomb blockade quantum dots in thecrossover from orthogonal to unitary symmetry. The scale for the crossover isindependent of the number of channels in each lead, in contrast with the caseof open dots. The functional form of the weak localization peak is independentof temperature. We also derive analytically the variance of the conductancepeak heights as a function of the crossover parameter.Comment: 12 pages, 1 postscript figur

Weak localization in the conductance peaks of Coulomb-blockade quantum dots