Holstein, Barry
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Professor Emeritus, Physics Department
Last Name
Holstein
First Name
Barry
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Physics
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208 results
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Publication Metadata only FUTURE-DIRECTIONS IN CP-VIOLATION(1988) Holstein, BROngoing experiments seeking CP violating effects in the neuron dipole moment and in ε1/ε are at the stage where they will yield critical constraints on attempts to pinpoint the origin of this phenomenon. A number of additional experiments which appear promising in this regard are proposed.Publication Open Access Long Range Electromagnetic Effects involving Neutral Systems and Effective Field Theory(2008-01) Holstein, BRWe analyze the electromagnetic scattering of massive particles with and without spin wherein one particle (or both) is electrically neutral. Using the techniques of effective field theory, we isolate the leading long distance effects, both classical and quantum mechanical. For spinless systems results are identical to those obtained earlier via more elaborate dispersive methods. However, we also find new results if either or both particles carry spin.Publication Metadata only TESTING QCD AT LOW ENERGIES(1992) Holstein, BRWe examine three low energy experiments which probe various aspects of the chiral symmetry property of the underlying QCD Lagrangian and point out possible problems.Publication Metadata only DISPERSIVE CONTRIBUTIONS TO K0-KBAR0 MIXING AND CP VIOLATION(1984) Donoghue, JF; Holstein, BRWe consider the role of dispersive contributions in the analysis of the KL-KS system. These long-distance pieces can be present in both the real and imaginary parts of the mixing element M12. We provide an estimate of one such effect in Im M12, the η′ pole, which turns out to be potentially significant. These terms can substantially modify phenomenological studies, as we demonstrate for several cases. Improved experimental bounds on ε′/ε can provide a strong limit on dispersive effects in Im M12, and may in the near future remove the uncertainties caused by these contributions.Publication Open Access SU(3) baryon chiral perturbation theory and long distance regularization(1999) Donoghue, JF; Holstein, BR; Borasoy, BThe use of SU(3) chiral perturbation theory in the analysis of low energy meson-baryon interactions is discussed. It is emphasized that short distance effects, arising from propagation of Goldstone bosons over distances smaller than a typical hadronic size, are modeldependent and can lead to a lack of convergence in the SU(3) chiral expansion if they are included in loop diagrams. In this paper we demonstrate how to remove such effects in a chirally consistent fashion by use of a cutoff and demonstrate that such removal ameliorates problems which have arisen in previous calculations due to large loop effects.Publication Open Access Generalized polarizabilities and the chiral structure of the nucleon(1998) Hemmert, TR; Holstein, BR; Knochlein, G; Scherer, SWe discuss the virtual Compton scattering reaction e−p → e−pγ at low energies. We present results for the generalized polarizabilities of the nucleon obtained in heavy baryon chiral perturbation theory at O(p3).Publication Metadata only Gyroscope precession and general relativity(2001-01) Holstein, BRPrecession of a gyroscope in the presence of a gravitational field is of considerable interest, on account of the soon to be launched satellite test and because of its connection to Mach’s principle. Nevertheless, this topic is not generally covered in the curriculum because of the mathematical sophistication required. We examine some of the simple physics involved and argue that by examining simple graviton-elementary particle couplings one can easily understand this phenomenon.Publication Metadata only ELEMENTARY DERIVATION OF THE RADIATION-FIELD FROM AN ACCELERATED CHARGE(1981) Holstein, BR; SWIFT, ARUsing only the equivalence principle and elementary electrodynamics we calculate the radiation from an accelerating charge in a direction perpendicular to its motion.Publication Metadata only KAON DECAYS AND A DETERMINATION OF THE SCALE OF CHIRAL SYMMETRY(1984) Donoghue, JF; Golowich, Eugene; Holstein, BRUsing effective chiral Lagrangians, we consider the occurrence of quadratic terms in the ΔI=1/2 K→3π matrix element. The inclusion of higher-derivative Lagrangians leads to a significant improvement over the usual current-algebra analysis. This allows an extraction directly from experimental data of Λχ, a measure of the scale of chiral symmetry. We give an operational definition of the chiral scale, and find Λχ≈1 GeV. The issue of uncertainty in the phenomenological determination of the B parameter is clarified.Publication Metadata only COMMENT ON PARTICLE MIXING AND DELTA-I= 3/2 TERMS IN NON-LEPTONIC WEAK DECAYS(1981) Holstein, BRA recent paper by Gusbin concludes that ΔI=3/2 terms in K→πη can substantially modify particle-mixing contributions to K+→π+π0. Using techniques which can successfully reproduce the experimental features of the K→ππ decays, we argue that this seems unlikely.