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We analyze the ghost condensates <f^{abc}c^{b}c^{c}>, <f^{abc}\oc^{b}\oc^{c}>and <f^{abc}\oc^{b}c^{c}> in Yang-Mills theory in the Curci-Ferrari gauge. Bycombining the local composite operator formalism with the algebraicrenormalization technique, we are able to give a simultaneous discussion of<f^{abc}c^{b}c^{c}>, <f^{abc}\oc^{b}\oc^{c}> and <f^{abc}\oc^{b}c^{c}>, whichcan be seen as playing the role of the BCS, respectively Overhauser effect inordinary superconductivity. The Curci-Ferrari gauge exhibits a globalcontinuous symmetry generated by the Nakanishi-Ojima (NO) algebra. This algebraincludes, next to the (anti-)BRST transformation, a SL(2,R) subalgebra. Wediscuss the dynamical symmetry breaking of the NO algebra through these ghostcondensates. Particular attention is paid to the Landau gauge, a special caseof the Curci-Ferrari gauge.Comment: 33 pages, 2 eps figures. v2: version published in JHEP, author added,  error in potential corrected. Results and conclusions unchange

More on ghost condensation in Yang-Mills theory: BCS versus Overhauser effect and the breakdown of the Nakanishi-Ojima annex SL(2,Bbb R) symmetry