Starting from the standard and commonly used relativistic nucleon wave function, we show that residual interactions based on gluon or Goldstone boson exchanges generate additional components leading to configuration mixing. This result suggests that realistic nucleon wave functions can be expected to be far more complex than seemingly successful form factor fits in relativistic quark models wou...

We give an S-matrix-theoretic demonstration that if the Higgs-boson mass exceeds M, = (8m'/3GF)", parital-wave unitarity is not respected by the tree diagrams for two-body scattering of gauge bosons, and the weak interactions must become strong at high energies. We exhibit the relation of this bound to the structure of the Higgs-Goldstone Lagrangian, and speculate on the consequences of strongl...

I present a selection of recent lattice data by major collaborations for the pseudo-Goldstone boson masses in full (Nf =2) QCD, where the valence quarks are chosen exactly degenerate with the sea quarks. At least the more chiral points should be consistent with Chiral Perturbation Theory for the latter to be useful in extrapolating to physical masses. Perspectives to reliably determine NLO Gass...

The field responsible for the cosmological curvature perturbations generated during a stage of primordial inflation might be the “curvaton”, a field different from the inflaton field. To keep the effective mass of the curvaton small enough compared to the Hubble rate during inflation one may not invoke supersymmetry since the latter is broken by the vacuum energy density. In this paper we propo...

S.-I. ANDO, R. BECK, V. BERNARD, B. BORASOY, P. BÜTTIKER, S. CHOI, P.J. ELLIS, J. GOITY, H.-W. HAMMER, D.L. HORNIDGE, S.P. KRUGLOV, B. KUBIS, R. LEWIS, R.A. LINDGREN, R. MEIER, M. MOJŽIŠ, G.C. OADES, J.A. OLLER, M.G. OLSSON, C. PAPANICOLAS, M.M. PAVAN, M.L. PITT, M.J. RAMSEY-MUSOLF, M.E. SAINIO, S. ŠIRCA, R.P. SPRINGER, J. STAHOV, R. TACIK, C. UNKMEIR, M. VANDERHAEGEN (Participants) FZJ-IKP(TH)...

I describe a version of so-called naive dimensional analysis, a rule for estimating the sizes of terms in an effective theory below the scale of chiral symmetry breaking induced by a strong gauge interaction. The rule is simpler and more general than the original, which it includes as a special case. I also give a simple qualitative interpretation of the rule. Research supported in part by the ...