0000000000164627

AUTHOR

Eugene Golowich

showing 5 related works from this author

QCD Condensates for the Light Quark V-A Correlator

2003

We use the procedure of pinched-weight Finite Energy Sum Rules (pFESR) to determine the OPE coefficients a_6, ...,a_16 of the flavor ud V-A correlator in terms of existing hadronic tau decay data. We show by appropriate weight choices that the error on the dominant d=6 contribution, which is known to be related to the K -> Pi Pi matrix elements of the electroweak penguin operator in the chiral limit, may be reduced to below the ~15% level. The values we obtain for the OPE coefficients with d>8 are shown to naturally account for the discrepancies between our results for the d=6 and d=8 terms and those of previous analyses, which were obtained neglecting d>8 contributions.

PhysicsQuantum chromodynamicsQuarkNuclear and High Energy PhysicsParticle physics010308 nuclear & particles physicsOperator (physics)Electroweak interactionHadronHigh Energy Physics::PhenomenologyFOS: Physical sciences01 natural sciences3. Good healthMatrix (mathematics)High Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)0103 physical sciencesOperator product expansion010306 general physicsEnergy (signal processing)
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Flavor physics in the quark sector

2010

218 páginas, 106 figuras, 89 tablas.-- arXiv:0907.5386v2.-- Report of the CKM workshop, Rome 9-13th Sep. 2008.-- et al.

QuarkParticle physicsKobayashi-Maskawa MatrixMesonField (physics)Rare Kaon DecaysHigh Energy Physics::LatticeFlavourGeneral Physics and AstronomyFOS: Physical sciencesPhysics and Astronomy(all)Determination of Cabibbo-Kobayashi & Maskawa (CKM) matrix element01 natural sciencesDirect Cp-ViolationStandard ModelTo-Leading OrderHigh Energy Physics - Phenomenology (hep-ph)Chiral Perturbation-Theory/dk/atira/pure/subjectarea/asjc/31000103 physical sciences010306 general physicsFlavorParticle Physics - PhenomenologyPhysics010308 nuclear & particles physics12.15.Hh Determination of Cabibbo-Kobayashi & Maskawa (CKM) matrix elementsHigh Energy Physics::PhenomenologyELEMENTARY PARTICLE PHYSICSFísicahep-ph13.20.Eb Decays of K mesonsQuantum numberLarge Tan-BetaSettore FIS/02 - Fisica Teorica Modelli e Metodi MatematiciHigh Energy Physics - Phenomenology13.20.He Decays of bottom mesonsB MESON[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph]Effective-Field-TheoryCP violationB-Meson DecaysUniversal Extra DimensionsHigh Energy Physics::ExperimentCP VIOLATIONRooted Staggered FermionsCharmed mesons (|C|>0 B=0)
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and the electroweak penguin contribution

2003

Abstract Our dispersive sum rule calculation of the electroweak penguin contribution to ϵ′ ϵ is reviewed. A more recent analysis based on the finite-energy sum rule approach is described. Finally, a new determination of the electroweak penguin contribution to ϵ′ ϵ is presented.

Quantum chromodynamicsNuclear and High Energy PhysicsParticle physicsHigh Energy Physics::PhenomenologyElectroweak interactionAtomic and Molecular Physics and OpticsStandard ModelCombinatoricsGrand Unified TheoryHigh Energy Physics::ExperimentPerturbation theory (quantum mechanics)Sum rule in quantum mechanicsGauge theoryOperator product expansionMathematicsNuclear Physics B - Proceedings Supplements
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K -> pi pi Electroweak Penguins in the Chiral Limit

2002

We report on dispersive and finite energy sum rule analyses of the electroweak penguin matrix elements in the chiral limit. We accomplish the correct perturbative matching (scale and scheme dependence) at NLO in alpha_s, and we describe two different strategies for numerical evaluation.

PhysicsNuclear and High Energy PhysicsParticle physics010308 nuclear & particles physicsElectroweak interactionHigh Energy Physics::PhenomenologyScale (descriptive set theory)01 natural sciencesAtomic and Molecular Physics and OpticsMatrix (mathematics)High Energy Physics - Phenomenology0103 physical sciencesHigh Energy Physics::ExperimentLimit (mathematics)Sum rule in quantum mechanics010306 general physics
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Improved determination of the electroweak penguin contribution to ϵ′/ϵ in the chiral limit

2003

We perform a finite energy sum rule analysis of the flavor ud two-point V-A current correlator, Delta Pi (Q^2). The analysis, which is performed using both the ALEPH and OPAL databases for the V-A spectral function, Delta rho, allows us to extract the dimension six V-A OPE coefficient, a_6, which is related to the matrix element of the electroweak penguin operator, Q_8, by chiral symmetry. The result for a_6 leads directly to the improved (chiral limit) determination epsilon'/epsilon = (- 15.0 +- 2.7) 10^{-4}. Determination of higher dimension OPE contributions also allows us to perform an independent test using a low-scale constrained dispersive analysis, which provides a highly nontrivial…

PhysicsNuclear and High Energy PhysicsParticle physicsCurrent (mathematics)010308 nuclear & particles physicsOperator (physics)High Energy Physics::PhenomenologyElectroweak interaction01 natural sciencesDimension (vector space)Consistency (statistics)0103 physical sciencesHigh Energy Physics::ExperimentLimit (mathematics)Sum rule in quantum mechanics010306 general physicsEnergy (signal processing)Physics Letters B
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