The Experts below are selected from a list of 1591761 Experts worldwide ranked by ideXlab platform
Otto C W Kong - One of the best experts on this subject based on the ideXlab platform.
-
detailed analysis of one loop neutrino masses from the generic supersymmetric Standard Model
Physical Review D, 2004Co-Authors: Sin Kyu Kang, Otto C W KongAbstract:In the generic supersymmetric Standard Model which had no global symmetry enforced by hand, lepton number violation is a natural consequence. Supersymmetry, hence, can be considered the source of experimentally demanded beyond Standard Model properties for the neutrinos. With an efficient formulation of the Model, we perform a comprehensive detailed analysis of all one-loop contributions to neutrino masses.
-
electric dipole moments in the generic supersymmetric Standard Model
Physics of Atomic Nuclei, 2002Co-Authors: Otto C W KongAbstract:The generic supersymmetric Standard Model is a Model built from a supersymmetrized Standard Model field spectrum and the gauge symmetries only. The popular minimal supersymmetric Standard Model differs from the generic version in having R parity imposed by hand. We review an efficient formulation of the Model and some of the recently obtained interesting phenomenological features, focusing on one-loop contributions to fermion electric dipole moments.
-
the generic supersymmetric Standard Model as the complete theory of supersymmetry without r parity
arXiv: High Energy Physics - Phenomenology, 2001Co-Authors: Otto C W KongAbstract:The generic supersymmetric Standard Model is a Model built from a supersymmetrized Standard Model field spectrum the gauge symmetries only. The popular minimal supersymmetric Standard Model differs from the generic version in having R-parity imposed by hand. We review an efficient formulation of the Model in which all the admissible R-parity violating terms are incorporated without bias. The Model gives many new interesting R-parity violating phenomenological features only started to be studied recently. Some of our recent results will be discussed, including newly identified 1-loop contributions to neutrino masses and electric dipole moments of neutron and electron. This is related to the largely overlooked R-parity violating contributions to squark and slepton mixings, which we also present in detail.
Mark B Wise - One of the best experts on this subject based on the ideXlab platform.
-
the lee wick Standard Model
Physical Review D, 2008Co-Authors: Benjam On Grinstein, Donal Oconnell, Mark B WiseAbstract:We construct a modification of the Standard Model which stabilizes the Higgs mass against quadratically divergent radiative corrections, using ideas originally discussed by Lee and Wick in the context of a finite theory of quantum electrodynamics. The Lagrangian includes new higher derivative operators. We show that the higher derivative terms can be eliminated by introducing a set of auxiliary fields; this allows for convenient computation and makes the physical interpretation more transparent. The theory is thought to be unitary, but nevertheless, it does not satisfy the usual analyticity conditions.
-
flavor changing neutral currents in the lee wick Standard Model
Physics Letters B, 2008Co-Authors: Timothy R Dulaney, Mark B WiseAbstract:Recently an extension of the Standard Model (the Lee–Wick Standard Model) based on ideas of Lee and Wick (LW) was introduced. It does not contain quadratic divergences in the Higgs mass and hence solves the hierarchy puzzle. The LW Standard Model contains new heavy LW-resonances at the TeV scale that decay to ordinary particles. In this Letter we examine in more detail the flavor structure of the theory. We integrate out the heavy LW-fermions at tree level and find that this induces flavor changing Z-boson couplings. However, these flavor changing neutral currents are acceptably small since they are automatically suppressed by small Yukawa couplings. This is the case even though the theory does not satisfy the principle of minimal flavor violation. New couplings of the charged W-bosons to quarks and leptons are also induced. We also integrate out the LW–Higgs and examine the four-fermion operators induced.
Gabe Shaughnessy - One of the best experts on this subject based on the ideXlab platform.
-
complex singlet extension of the Standard Model
Physical Review D, 2009Co-Authors: V Barger, Paul Langacker, Mathew Mccaskey, Michael J Ramseymusolf, Gabe ShaughnessyAbstract:We analyze a simple extension of the Standard Model (SM) obtained by adding a complex singlet to the scalar sector (cxSM). We show that the cxSM can contain one or two viable cold dark matter candidates and analyze the conditions on the parameters of the scalar potential that yield the observed relic density. When the cxSM potential contains a global U(1) symmetry that is both softly and spontaneously broken, it contains both a viable dark matter candidate and the ingredients necessary for a strong first order electroweak phase transition as needed for electroweak baryogenesis. We also study the implications of the Model for discovery of a Higgs boson at the Large Hadron Collider.
Ana M Teixeira - One of the best experts on this subject based on the ideXlab platform.
-
the next to minimal supersymmetric Standard Model
Physics Reports, 2010Co-Authors: Ulrich Ellwanger, Cyril Hugonie, Ana M TeixeiraAbstract:Abstract We review the theoretical and phenomenological aspects of the Next-to-Minimal Supersymmetric Standard Model: the Higgs sector including radiative corrections and the 2-loop β -functions for all parameters of the general NMSSM; the tadpole and domain wall problems, baryogenesis; NMSSM phenomenology at colliders, B physics and dark matter; specific scenarios as the constrained NMSSM, gauge mediated supersymmetry breaking, U ( 1 ) ′ -extensions, CP and R-parity violation.
-
the next to minimal supersymmetric Standard Model
arXiv: High Energy Physics - Phenomenology, 2009Co-Authors: Ulrich Ellwanger, Cyril Hugonie, Ana M TeixeiraAbstract:We review the theoretical and phenomenological aspects of the Next-to-Minimal Supersymmetric Standard Model: the Higgs sector including radiative corrections and the 2-loop beta-functions for all parameters of the general NMSSM; the tadpole and domain wall problems, baryogenesis; NMSSM phenomenology at colliders, B physics and dark matter; specific scenarios as the constrained NMSSM, Gauge Mediated Supersymmetry Breaking, U(1)'-extensions, CP and R-parity violation.
R Nevzorov - One of the best experts on this subject based on the ideXlab platform.
-
theory and phenomenology of an exceptional supersymmetric Standard Model
Physical Review D, 2006Co-Authors: Stephen F King, Stefano Moretti, R NevzorovAbstract:We make a comprehensive study of the theory and phenomenology of a low-energy supersymmetric Standard Model originating from a string-inspired E6 grand unified gauge group. The exceptional supersymmetric Standard Model (ESSM) considered here is based on the low-energy Standard Model gauge group together with an extra Z[prime] corresponding to an extra U(1)N gauge symmetry under which right-handed neutrinos have zero charge. The low-energy matter content of the ESSM corresponds to three 27 representations of the E6 symmetry group, to ensure anomaly cancellation, plus an additional pair of Higgs-like doublets as required for high-energy gauge coupling unification. The ESSM is therefore a low-energy alternative to the minimal supersymmetric Standard Model (MSSM) or next-to-minimal supersymmetric Standard Model (NMSSM). The ESSM involves extra matter beyond the MSSM contained in three 5+5* representations of SU(5), plus three SU(5) singlets which carry U(1)N charges, one of which develops a vacuum expectation value, providing the effective µ term for the Higgs doublets, as well as the necessary exotic fermion masses. We explore the renormalization group flow of the ESSM and examine theoretical restrictions on the values of new Yukawa couplings caused by the validity of perturbation theory up to the grand unification scale. We then discuss electroweak symmetry breaking and Higgs phenomenology and establish an upper limit on the mass of the lightest Higgs particle which can be significantly heavier than in the MSSM and NMSSM, in leading two-loop approximation. We also discuss the phenomenology of the Z[prime] and the extra matter, whose discovery will provide a smoking gun signal of the Model.
