Showing papers by "Kai Puolamäki published in 1997"
TL;DR: In this paper, a relation between right-handed gauge boson mass and soft squark mass in naturally R-parity conserving general supersymmetric left-right models was obtained.
6 citations
TL;DR: In this paper, a relation between right-handed gauge boson mass and soft squark mass was obtained in naturally R-parity conserving general supersymmetric left-right models.
Abstract: We obtain a relation between right-handed gauge boson mass and soft squark mass in naturally R-parity conserving general supersymmetric left-right models. This relation implies that either ${W_R}$ is lighter than twice the soft squark mass, or a ratio of vacuum expectation values (VEVs) in the model, denoted by $\tan\alpha$, is close to its value of unity in the limit of vanishing D-terms. Generally, we find that for heavy $W_R$ $\tan\alpha$ is larger than one, and that the right-handed sneutrino VEV, responsible for spontaneous R-parity breaking, is at most of the order $M_{SUSY}/h_{\Delta_R}$, where $M_{SUSY}$ is supersymmetry breaking scale and $h_{\Delta_R}$ is the Yukawa coupling in Majorana mass term for right-handed neutrinos. These constraints follow from $SU(3)_c$ and $U(1)_{em}$ gauge invariance of the ground state of the theory.
6 citations
TL;DR: In this article, the consequences of spontaneously broken R-parity in present and planned lepton-lepton colliders are reviewed, where the authors show that spontaneous breaking is generated via a non-vanishing VEV of at least one of the sneutrinos, which necessarily means nonconservation of lepton number.
Abstract: We review the consequences of spontaneously broken R-parity in present and planned lepton-lepton colliders In the left-right models the R-parity, $R=(-1)^{3(B-L)+2S}$, is preserved due to the gauge symmetry, but it must be spontaneously broken in order to the scalar spectrum to be physically consistent The spontaneous breaking is generated via a non-vanishing VEV of at least one of the sneutrinos, which necessarily means non-conservation of lepton number $L$ The R-parity violating couplings are parametrized in terms of mixing angles, whose values depend on model parameters Combined with the constraints derived from low-energy measurements this yields allowed ranges for various R-parity breaking couplings The R-parity breaking allows for the processes in which a single chargino or neutralino is produced, subsequently decaying at the interaction point to non-supersymmetric particles
15 Jun 1997
TL;DR: In this article, the consequences of spontaneously broken R-parity in present and planned lepton-lepton colliders are reviewed, and a parametrization of couplings is proposed in terms of mixing angles, whose values depend on model parameters.
Abstract: We review the consequences of spontaneously broken R-parity in present and planned lepton-lepton colliders. In the left-right models the R-parity, R=(−1)3(B−L)+2S, is preserved due to the gauge symmetry, but it must be spontaneously broken in order to the scalar spectrum to be physically consistent. The spontaneous breaking is generated via a non-vanishing VEV of at least one of the sneutrinos, which necessarily means non-conservation of lepton number L. The R-parity violating couplings are parametrized in terms of mixing angles, whose values depend on model parameters. Combined with the constraints derived from low-energy measurements this yields allowed ranges for various R-parity breaking couplings. The R-parity breaking allows for the processes in which a single chargino or neutralino is produced, subsequently decaying at the interaction point to non-supersymmetric particles.