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.

[No abstract]

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 sin(2β) and sin(2α), γ, xs, and ABs. In models allowing mixing to a new isosinglet down quark (as in E6) flavor changing neutral currents are induced that allow a Z0 mediated contribution to B - B̄ mixing and which bring in new phases. In (ρ, η), (xs ,sin(γ)), and (xs ,ABxs) 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 sin(γ) and/or xs to verify or to rule out an extra down quark contribution.

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.