Published December 2015 | Version v1
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Leading hadronic contributions to the running of the electroweak coupling constants from lattice QCD

Creators

  • 1. OakLabs GmbH, Hennigsdorf (Germany)
  • 2. Deutsches Elektronen-Synchrotron (DESY), Zeuthen (Germany). John von Neumann-Inst. fuer Computing NIC
  • 3. Bonn Univ. (Germany). Inst. fuer Strahlen- und Kernphysik
  • 4. Humboldt-Universitaet, Berlin (Germany). Inst. fuer Physik

Description

The quark-connected leading-order hadronic contributions to the running of the electromagnetic fine structure constant, αQED, and the weak mixing angle, θW, are determined by a four-flavour lattice QCD computation with twisted mass fermions. Full agreement of the results with a phenomenological analysis is observed with an even comparable statistical uncertainty. We show that the uncertainty of the lattice calculation is dominated by systematic effects which then leads to significantly larger errors than obtained by the phenomenological analysis.

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Additional details

Publishing Information

Imprint Pagination
23 p.
ISSN
0418-9833
Report number
DESY--15-056

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
47081448
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Descriptors DEI
CHIRALITY; EFFECTIVE MASS; EXTRAPOLATION; FLAVOR MODEL; LATTICE FIELD THEORY; PIONS; QUANTUM CHROMODYNAMICS; QUARKS; REST MASS; SOMMERFELD CONSTANT; VACUUM POLARIZATION; WEINBERG ANGLE; WEINBERG-SALAM GAUGE MODEL
Descriptors DEC
BOSONS; COMPOSITE MODELS; CONSTRUCTIVE FIELD THEORY; DIMENSIONLESS NUMBERS; ELEMENTARY PARTICLES; FERMIONS; FIELD THEORIES; HADRONS; MASS; MATHEMATICAL MODELS; MATHEMATICAL SOLUTIONS; MESONS; MIXING ANGLE; NUMERICAL SOLUTION; PARTICLE MODELS; PARTICLE PROPERTIES; PSEUDOSCALAR MESONS; QUANTUM FIELD THEORY; QUARK MODEL; UNIFIED GAUGE MODELS; UNIFIED-FIELD THEORIES