Published October 1978 | Version v1
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Quark model calculation of the parity violating NNπ coupling in the Weinberg-Salam model

Creators

  • 1. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany, F.R.)
  • 2. Istituto Nazionale di Fisica Nucleare, Frascati (Italy). Lab. Nazionale di Frascati
  • 3. Hamburg Univ. (Germany, F.R.). 1. Inst. fuer Theoretische Physik

Description

We argue that there are no charged current contributions to the parity violating NNπ coupling except for small contributions from flavour symmetry breaking effects. From the neutral current product only the left-right chiral component contributes which is considerably enhanced due to gluon corrections and due to the lightness of current quark masses. The resulting parity violating NNπ coupling has a definite phase and is 10 times stronger than the value used previously in nuclear physics calculations. (orig.)

Availability note (English)

MF available from INIS under the Report Number.

Abstract (German)

Es wird gezeigt, dass der geladene Strom bis auf kleine Beitraege der die Geschmackssymmetrie verletztenden Terme keinen Beitrag zur paritaetsverletztenden NNπ-Kopplung liefert. Vom Produkt des neutralen Stroms traegt nur die links-rechts-Chiralkomponente bei, die aufgrund von Gluonkorrekturen und der bisherigen kleinen Quarkmassen betraechtlich verstaerkt ist. Die resultierende paritaetsverletzten NNπ-Kopplung besitzt eine definierte Phase und ist etwa 10 mal staerker als der in neueren kernphysikalischen Rechnungen verwendete Wert. (orig.)

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Additional details

Publishing Information

Imprint Pagination
12 p.
Report number
DESY--78/61

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
10447325
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Resource subtype / Literary indicator
Numerical Data
Descriptors DEI
COUPLING CONSTANTS; FLAVOR MODEL; NEUTRAL-CURRENT INTERACTIONS; NUCLEON-NUCLEON INTERACTIONS; P INVARIANCE; PION-NUCLEON INTERACTIONS; QUARK MODEL; SYMMETRY BREAKING; TABLES; THEORETICAL DATA; WEAK NEUTRAL CURRENTS; WEINBERG LEPTON MODEL
Descriptors DEC
ALGEBRAIC CURRENTS; BARYON-BARYON INTERACTIONS; COMPOSITE MODELS; CURRENTS; DATA; DATA FORMS; FIELD THEORIES; HADRON-HADRON INTERACTIONS; INFORMATION; INTERACTIONS; INVARIANCE PRINCIPLES; MATHEMATICAL MODELS; MESON-BARYON INTERACTIONS; MESON-NUCLEON INTERACTIONS; NEUTRAL CURRENTS; NUMERICAL DATA; PARTICLE INTERACTIONS; PARTICLE MODELS; QUANTUM FIELD THEORY; UNIFIED GAUGE MODELS