Golowich, Eugene
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Professor Emeritus, Department of Physics
Last Name
Golowich
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Eugene
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Physics
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Publication Metadata only ARE THERE BARYONS WHICH CONTAIN CONSTITUENT GLUONS(1983) Golowich, E; HAQQ, E; KARL, GA study of three-quark—one-gluon configurations in the zero-strangeness, positive-parity sector is carried out. The quantum numbers of the ground-state levels in this system are identified. The mass spectrum is analyzed in both the bag-model and harmonic-oscillator dynamical frameworks. Mixing between the Q3 and Q3G sectors is determined, and implications of Q3-Q3G mixing are explored.Publication Open Access The weak ope and dimension-eight operators(2001-01) Golowich, EPublication Metadata only The chiral limit K -> pi pi matrix elements of the electroweak penguin operators Q(7,8)(2003-01) Maltman, K; Cirigliano, V; Donoghue, JF; Golowich, EugeneThe SU(3) chiral limit K → ππ matrix elements of the electroweak penguin operators, Q7,8, are determined using hadronic τ decay data, and dispersive and finite energy sum rules.Publication Open Access Unbinding the Deuteron(2008-01) Golowich, EugeneWe consider a description of the deuteron based on meson exchange potentials. A key feature is the inclusion of the I=S=0 two-pion intermediate state ('sigma(600)') as a significant component of the inter-nucleon potential energy. In this approach, deuteron binding is seen to be predominantly a consequence of sigma(600) and omega(783) exchange, with a secondary tole played by rho(770). We explore sensitivity of two-nucleon binding to changes in the potential and thereby obtain an anthropic constraint -- that the deuteron unbinds for a modest decrease (about 6%) in the attractive sigma(600) potential.Publication Metadata only TRIPLE-PRODUCT CORRELATIONS IN SEMILEPTONIC DECAYS(1989) Golowich, E; VALENCIA, GThe use of triple-product correlations to signal the presence of CP violations in decays of charged pseudoscalar mesons is studied. It is pointed out that observation of such correlations in the semileptonic modes is likely to be evidence for new physics. The effect of unitarity phases is discussed and a detailed analysis of the Weinberg Higgs-boson model of CP violation is carried out for charged B mesons and kaons.Publication Open Access Relating D-0-D-0 mixing and D-0 -> l(+)l(-) with new physics(2009-01) Golowich, E; Hewett, J; Pakvasa, S; Petrov, AAWe point out how, in certain models of new physics, the same combination of couplings occurs in the amplitudes for both D0-D̅ 0 mixing and the rare decays D0→ℓ+ℓ-. If the new physics dominates and is responsible for the observed mixing, then a very simple correlation exists between the magnitudes of each; in fact the rates for the decay D0→ℓ+ℓ- are completely fixed by the mixing. Observation of D0→ℓ+ℓ- in excess of the standard model prediction could identify new physics contributions to D0-D̅ 0 mixing.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 Open Access Charm Mixing and CP-violations - Theory(2008-01) Golowich, EugeneI begin by commenting on the most recent experimental compilation of D^0 mixing data, emphasizing the so-called 'strong phase' issue. This is followed by a review of the theory underlying charm mixing, both Standard Model and New Physics. The mechanism of R_p-violation is used to illustrate the methodology for New Physics contributions and the relation of this to rare D^0 decays is pointed out. Finally, I address the subject of CP-violating asymmetries by describing some suggestions for future experimental studies and a recent theoretical analysis of New Physics contributions.Publication Open Access Comment on ‘Analysis of O(p2) Corrections to hðð|Q7,8|Ki’(2002-01) Cirigliano, Vincenzo; Golowich, EugeneWe extend in several respects our earlier work on O(p2) corrections to the matrix elements of the electroweak penguin operator Oewp. First, to facilitate comparison with certain lattice studies we calculate O(p2) corrections to 〈π|Oewp|K〉 in the SU(3) limit of equal light quark masses. Next, we demonstrate how an apparent disagreement in the literature regarding whether higher order chiral contributions increase or decrease 〈(ππ)I=2|Oewp|K〉 is simply a consequence of how the leading order chiral amplitude is defined. Finally, we address an aspect of the ε′/ε problem by estimating O(p2) corrections to recent determinations of 〈(ππ)I=2|Q7,8|K〉 which were carried out in the chiral limit.Publication Metadata only BACKGROUNDS FOR TAGGING BS EVENTS AT LEP(1990) Golowich, E; LEYAOUANC, A; OLIVER, L; PENE, O; RAYNAL, JCThe final state $$D_s + l + \bar v_l + \cdots $$ occurring inZ 0-decay is analyzed, and backgrounds to the decay chain $$(i) Z^0 \to B_s + \cdots ,(ii) B_s \to D_s + l + \bar v_l + \cdots $$ are estimated. A resonance description is used to model the dominant source of background, and a numerical study yields estimates for the background-to-signal ratio of several per cent as input parameters are varied.