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We consider a renormalizable extension of the minimal supersymmetric standard model endowed by an R and a gauged B - L symmetry. The model incorporates chaotic inflation driven by a quartic potential, associated with the Higgs field which leads to a spontaneous breaking of U(1)B-L, and yields possibly detectable gravitational waves. We employ quadratic Kahler potentials with a prominent shift-symmetric part proportional to c- and a tiny violation, proportional to c+, included in a logarithmdoi:10.3390/universe4010013 fatcat:6yb7g5y4dnfk3nalcsvrfvpeue