Jonathan Bagger - Academia.edu (original) (raw)

Papers by Jonathan Bagger

Physics Letters B, 1997

We compute the leading QCD corrections to K-K mixing in the supersymmetric standard model with ge... more We compute the leading QCD corrections to K-K mixing in the supersymmetric standard model with general soft supersymmetry-breaking parameters. We construct the ΔS = 2 effective Lagrangian for three hierarchies of supersymmetric particle masses, namely, when the gluino mass is comparable to, much greater than, or much less than the masses of the first two generation squarks. We find that

Physical Review D, 1988

Recently proposed chiral-color models predict the existence of a massive color octet of vector bo... more Recently proposed chiral-color models predict the existence of a massive color octet of vector bosons, the axigluon. In this paper we investigate axigluon production in hadronic collisions. We compute the single-jet inclusive cross section and the two-jet invariant-mass distribution for the CERN collider, the Fermilab Tevatron, and the Superconducting Super Collider. We use CERN data to exclude axigluon masses between

Physical Review Letters, 1985

We use the SU(3)⊗SU(2)⊗U(1) renormalization-group equations to constrain fermion masses and charg... more We use the SU(3)⊗SU(2)⊗U(1) renormalization-group equations to constrain fermion masses and charged-scalar couplings in supersymmetric grand unified theories.

Nuclear Physics B, 1985

We use the infrared fixed-point structure of the SU(3) × SU(2) × U(1) renormalization group equat... more We use the infrared fixed-point structure of the SU(3) × SU(2) × U(1) renormalization group equations to derive predictions for the masses and mixings of heavy families in perturbatively unifiable grand unified theories. We show that the sum of the squares of all quark (or lepton) masses must be less than (355 GeV)2. This implies that theories with NHheavy families

Journal of High Energy Physics, 2000

We consider the effects of anomalies on the supersymmetry-breaking parameters in supergravity the... more We consider the effects of anomalies on the supersymmetry-breaking parameters in supergravity theories. We construct a supersymmetric expression for the anomaly-induced terms in the 1PI effective action; we use this result to compute the complete one-loop formula for the anomaly-induced gaugino mass. The mass receives contributions from the super-Weyl, Kähler, and sigma-model anomalies of the supergravity theory. We point out

Nuclear Physics B, 1994

All generic, calculable models of dynamical supersymmetry breaking have a spontaneously broken R-... more All generic, calculable models of dynamical supersymmetry breaking have a spontaneously broken R-symmetry and therefore contain an R-axion. We showthat the axion is massive in any model in which the cosmological constant is fine-tuned to zero through an explicit R-symmetry-breaking c constant. In visible-sector models, the axion mass is in the 100 MeV range and thus evades astrophysical bounds. In

Nuclear Physics B, 1997

In this paper we compute one-loop corrections to masses and couplings in the minimal supersymmetr... more In this paper we compute one-loop corrections to masses and couplings in the minimal supersymmetric standard model. We present explicit formulae for the complete corrections and a set of compact approximations which hold over the unified parameter space associated with radiative electroweak symmetry breaking. We illustrate the importance of the corrections and the accuracy of our approximations by scanning over