Upper bound on all products of R-parity violating couplings (lambda)' and (lambda)'' from proton decay

摘要

We prove that any product of R-parity violating couplings (lambda)'(L-violating) and (lambda)'' (B-violating) can be strongly restricted by proton decay data. For any pair (lambda)' and (lambda)'' the decay exists at least at one loop level. For squark masses below 1 TeV we find the conservative bounds modul (lambda)' (center dot) (lambda)'' < 10(sup -9) in absence of squark flavor mixing, and modul (lambda)' (center dot) (lambda)'' < 10(sup -11) when this mixing is taken into account. We study the dependence of the bounds on the flavor basis in which R-parity breaking couplings are determined. (author). 11 refs, 2 figs. (Atomindex citation 27:066718)