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We present a detailed analysis together with exact numerical calculations onone-loop contributions to neutron electric dipole moment from supersymmetrywithout R-parity, focusing on the gluino, chargino, and neutralinocontributions. Apart from the neglected family mixing among quarks, completeformulae are given for the various contributions, through the quark dipoleoperators, to which the present study is restricted. We discuss the structureand main features of the R-parity violating contributions and the interplaybetween the R-parity conserving and violating parameters. In particular, theparameter combination $\mu_i^*\lambda^{\prime}_{i11}$, under the optimalparametrization adopted, is shown to be solely responsible for the R-parityviolating contributions in the supersymmetric loop diagrams. While$\mu_i^*\lambda^{\prime}_{i11}$ could bear a complex phase, the latter is notnecessary to have a R-parity violating contribution.Comment: 43 pages Revtex with 15 eps- and 4 ps- figure files incoporated;  proofread version to be published in Phys. Rev.

One-loop neutron electric dipole moment from supersymmetry withoutRparity