We consider the jet cross sections for gluons coupling to quarks with an anomalous chromomagnetic moment. We then apply this to the deviation and bounds from QCD found in the CDF and D0 Fermilab data, respectively, to find a range of possible values for the anomalous moments. The quadratic and quartic terms in the anomalous moments can fit to the rise of a deviation with transverse energy. Since previous analyses have been done on the top quark total cross section, here we assume the same moment on all quarks except the top quark and find the range [Formula presented] Te[Formula presented] for the CDF data. Assuming the anomalous moment is present only on a charm or bottom quark which is pair produced results in a range [Formula presented] Te[Formula presented]. The magnitudes here are compared with anomalous magnetic moments that could account for [Formula presented] and found to be in the same general range, as well as not inconsistent with CERN LEP and SLD bounds on [Formula presented]. © 1996 The American Physical Society.

The forward absorptive part in M2 of a+b+c̄ elastic scattering has been related by Mueller to the inclusive single-particle spectrum for a+b→c+X. The nonforward a+b+c̄ 3-3 M2 absorptive part in the double-Regge region also has several physical applications. The M2 absorptive part of this amplitude is calculated in the region of double-Regge exchange using a multiperipheral model with exponential damping in momentum transfer and Regge behavior in inclusive subenergies. The absorptive part is then extended to an analytic function in M2. © 1973 The American Physical Society.

We extend the range of predictions of the isosinglet (or vector) down quark model to the fully allowed physical ranges, and also update this with the effect of new physics constraints. We constrain the present allowed ranges of (Formula presented) and (Formula presented) γ, (Formula presented) and (Formula presented) In models allowing mixing to a new isosinglet down quark (as in (Formula presented) flavor changing neutral currents are induced that allow a (Formula presented) mediated contribution to (Formula presented) mixing and which bring in new phases. In (ρ,η), (Formula presented) and (Formula presented) plots for the extra isosinglet down quark model which are herein extended to the full physical range, we find new allowed regions that will require experiments on (Formula presented) and/or (Formula presented) to verify or to rule out an extra down quark contribution. © 1998 The American Physical Society.

We impose new limits on flavor-changing neutral currents (FCNC's) applied to the 4 ± 4 mixing matrix of the next heaviest down quark in a model with extra SU(2)L singlet down quarks, such as in E6. We find the new bounds still allow tree-level FCNC Z exchange to dominate Bd0-B»d0 mixing, but not Bs0-B»s0 mixing. A stronger b'd bound by a factor of 1/10 could rule out the possibility of Z mediation with FCNC accounting for Bd0-B»d0 mixing. The unitarity "d-b triangle" may still be a quadrangle with a detectable fourth side. The CP asymmetries from Bd0 decay should show a new CP-violating phase if the Z-mediated process dominates Bd0-B»d0 mixing. © 1992 The American Physical Society.

A relativistic bound-state equation is applied to formulate the nonspectator (or W-exchange) decay rates of D, Ds, and B mesons, and their leptonic decay constants. The nonspectator decay rates are also calculated here in the Dirac-equation limit. In this limit we show that up to a logarithm the nonspectator rate grows with heavy-quark mass like m6, faster than the spectator rate of m5. Including an analysis of experimental D, D0, and Ds decay rates shows that the enhancement of D0 decays from the nonspectator diagram is about a quarter of the contribution from the spectator diagram. The relativistically calculated weak decay constant fB is in the 260300-MeV range. Predictions are also made for nonspectator B, Bs, and Bc decay rates &2.. AE © 1988 The American Physical Society.

Bander, Silverman, Klima, and Maor recently developed a relativistic formalism for quark-antiquark bound states. It was used to calculate the spectra and leptonic decay widths of charmonium, b-quarkonium, D mesons, F mesons, B mesons, and mesons composed of light quarks. The form of the interactions between quark and antiquark was highly motivated by QCD. We extend this relativistic treatment to a relativistic formulation of radiative decays that automatically takes into account the effects of recoil, uses boosted final-state meson wave functions, includes relativistic bound-state wave functions involving relativistic mixtures of terms, and treats the valence quarks as four-component spinors. We then calculate radiative transition rates of the charmonium and b-quarkonium systems in this formalism and find that transitions which can be compared with experiment are in good agreement. Predictions are also made for decays that are not yet measured. © 1987 The American Physical Society.

CP asymmetries in B0 decays into CP eigenstates are shown to be very useful in probing effects of new physics. Although there are many possible sources for inconsistencies with the Standard Model predictions, we find that various relations among the asymmetries test different aspects of new physics. We suggest a new way to test the assumption that the direct decays are dominated by a single combination of mixing parameters. We argue that new physics in K-K mixing is unlikely to affect the results. New physics in the mixing of Bd-Bd and Bs-Bs can be probed separately and independently of the unitarity of the CKM matrix. © 1990.

The double-pomeron coupling strength in the dual resonance model is found in both the inclusive and exclusive regions by comparison with experiments. Double-pomeron coupling occurs in inclusive experiments in the Mueller diagram for the central plateau region. Its strength can also be bounded from its non-observation in the two-particle to four-particle exclusive experiments. The dual resonance model is used to perform the analytic continuation of a six-point amplitude between these regions. The results show that the coupling strength for two forward pomerons in the exclusive region must be less than 1 300 of that in the inclusive region. This is experimental evidence for substantial forward double-pomeron decoupling in exclusive processes. © 1973.

We confront the new physics models with extra isosinglet down quarks in the new (Formula presented) violation experimental era with (Formula presented) and (Formula presented) measurements, (Formula presented) events, and (Formula presented) limits. The closeness of the new experimental results to the standard model theory requires us to include full standard model (SM) amplitudes in the analysis. In models allowing mixing to a new isosinglet down quark, as in (Formula presented) flavor changing neutral currents are induced that allow a (Formula presented) mediated contribution to (Formula presented) mixing and which bring in new phases. In (Formula presented) (Formula presented) and (Formula presented) plots we still find much larger regions in the four down quark model than in the SM, reaching down to (Formula presented) (Formula presented) (Formula presented) and (Formula presented) down to zero, all at (Formula presented) We elucidate the nature of the cancellation in an order (Formula presented) four down quark mixing matrix element which satisfies the experiments and reduces the number of independent angles and phases. We also evaluate tests of unitarity for the (Formula presented) Cabibbo-Kobayashi-Maskawa submatrix. © 2002 The American Physical Society.