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- Scott P. Carroll, Christin Boyd
- Evolution; international journal of organic…
- 1992

Evolution by natural selection is remarkably well documented in the diversification of soapberry bug populations on their native and recently introduced host plants. In this century, populations of… (More)

- Christin Boyd, Benjamı́n Grinstein
- 1994

The most general Lagrangian consistent with chiral, heavy quark, and strong interaction symmetries to order 1 M and to linear order in the SU(3) vector and axial currents is presented. Two new… (More)

- Christin Boyd, Benjamı́n Grinstein
- 1995

We compute the O(1 M , m s) heavy quark and SU(3) corrections to B s → D s eν form factors. In the limit of vanishing light quark mass, B s → D s eν form factors are given in terms of the the B → Deν… (More)

We give a pedagogical discussion of the physics underlying dispersion relation-derived parameterizations of form factors describing B → πlν̄ and B → Dlν̄. Moments of the dispersion relations are… (More)

We present the leading order differential and total rates for J/ψ production at LEP. By leading order we mean all terms of the form α s [α s log(M 2 Z /M 2 ψ)] n and α n+1 s log l (z 2) log m (M 2 Z… (More)

- Christin Boyd, F. Javier Vegas, Zachary Guralnik
- 1994

We calculate the α s corrections to the form factors which parameterize the hadronic tensor relevant for inclusive semileptonic B → Xτ ν τ and Λ b → Xτ ν τ decays. We apply our results to the double… (More)

We discuss the SU(3) and heavy quark spin-symmetry breaking mixing between the Ξc and Ξ ′ c charmed baryons. Chromomagnetic hyperfine interactions are the leading source of spin-symmetry breaking and… (More)

- James F. Amundson, Christin Boyd, +5 authors M. B. Wise
- 1992

The implications of chiral SU(3)L×SU(3)R symmetry and heavy quark symmetry for the radiative decays D∗0 → Dγ, D∗+ → Dγ, and D∗ s → Dsγ are discussed. Particular attention is paid to SU(3) violating… (More)

We construct model-independent parametrizations of the individual QCD form factors relevant to Λb → Λclν̄ decays. These results follow from dispersion relations and analyticity, and incorporate an… (More)

We calculate near zero recoil the order αs corrections to the Bjorken and Voloshin sum rules that bound the B → D(∗) l ν̄ form factors. These bounds are derived by relating the result of inserting a… (More)