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Journals and Conferences
The gene encoding the vancomycin resistance protein VanH from Enterococcus faecium, a D-lactate dehydrogenase, has been cloned into a thioredoxin expression system (pTRxFus) and expressed as a fusion protein. The use of several other expression systems yielded only inclusion bodies from which no functional protein could be recovered. Experiments to remove… (More)
The decay constants for the D and D S mesons, denoted f D and f D S respectively, are equal in the SU (3) V limit, as are the hadronic amplitudes for B S −B S and B 0 −B 0 mixing. The leading SU (3) V violating contribution to (f D S /f D) and to the ratio of hadronic matrix elements relevant for B S − B S and B 0 − B 0 mixing amplitudes are calculated in… (More)
The possibility of interpreting baryons containing a single heavy quark as bound states of solitons (that arise in the nonlinear sigma model) and heavy mesons is explored. Particular attention is paid to the parity of the bound states and to the role of heavy quark symmetry.
These lectures introduce some of the basic ideas of effective field theories. The topics discussed include: relevant and irrelevant operators and scaling, renormal-ization in effective field theories, decoupling of heavy particles, power counting, and naive dimensional analysis. Effective Lagrangians are used to study the ∆S = 2 weak interactions and chiral… (More)
Goldstone's theorem states that there is a massless mode for each broken symmetry generator. It has been known for a long time that the naive generalization of this counting fails to give the correct number of massless modes for spontaneously broken spacetime symmetries. We explain how to get the right count of massless modes in the general case, and… (More)
Electroweak Sudakov corrections of the form alphanlogms/MW,Z2 are summed using renormalization group evolution in soft-collinear effective theory. Results are given for the scalar, vector, and tensor form factors for fermion and scalar particles. The formalism for including massive gauge bosons in soft-collinear effective theory is developed.
These lectures introduce some of the basic ideas of eective eld theories. The topics discussed include: relevant and irrelevant operators and scaling, renormal-ization in eective eld theories, decoupling of heavy particles, power counting, and naive dimensional analysis. Eective Lagrangians are used to study the S = 2 w eak interactions and chiral… (More)
The differential decay spectrum dΓ/dE e dq 2 for the semileptonic decay of an unpolar-ized hadron containing a b-quark, and the decay spectrum dΓ/dE e dq 2 dcos θ for polarized Λ b decay are computed to second order in the 1/m b expansion. Most of the 1/m 2 b corrections have a simple physical interpretation, which is discussed in detail. The implications… (More)
The interaction of quarkonium with nuclei is studied in the m Q → ∞ limit of QCD, where the binding energy is found to be exactly computable. The dominant contribution to the interaction is from two-gluon operators. The forward matrix elements of these two-gluon operators can be determined from the QCD scale anomaly, and from deep inelastic scattering. We… (More)