Published April 1976 | Version v1
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Mass breaking in a relativistic quark model for mesons

Creators

  • 1. Hamburg Univ. (F.R. Germany). 2. Inst. fuer Theoretische Physik

Description

We study symmetry breaking via quark mass differences in a relativistic quark model where mesons are built from heavy (m > 3 GeV) spin 1/2 quarks and antiquarks. The meson (squared-) mass differences are linearly related to the number of strange, charmed, etc. quarks in the mesons. From the PSI-3105, phi, rho masses we predict the masses of the charmed vector mesons D*, F*. We further show that the, previously SUsub(n) symmetry of the mesonic couplings holds, i.e. quark mass differences only show up in the masses of the external particles, not in the three meson vertex itself. (orig.)

Availability note (English)

MF available from INIS under the Report Number.

Abstract (German)

Es werden Symmetrieaufbrueche ueber Quarkmassenunterschiede in einem relativischen Quarkmodell untersucht, in dem Mesonen aus schweren (m > 3 GeV) Quarks und Antiquarks mit Spin 1/2 gebildet werden. Die Mesonenmassenunterschiede (im Quadrat) stehen in linearem Zusammenhang mit der Zahl von 'strange, 'charmed' usw. Quarks in den Mesonen. Aus den PSI-3105-, phi-, rho-Massen werden die Massen der 'charmed' Vektormesonen D*, F* vorhergesagt. Weiterhin wird gezeigt, dass die frueher angenommene SUsub(n)-Symmetrie der Mesonenkopplung sich bestaetigt, d.h. unterschiedliche Quarkmassen zeigen sich nur in den Massen der aeusseren Teilchen und nicht im Drei-Mesonen-Vertex selbst. (orig.)

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Additional details

Publishing Information

Imprint Pagination
18 p.
Report number
DESY--76/25

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
7269910
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Descriptors DEI
BETHE-SALPETER EQUATION; CHARM PARTICLES; MASS DIFFERENCE; MASS FORMULAE; QUARK MODEL; QUARKS; SYMMETRY BREAKING; VECTOR MESONS
Descriptors DEC
BOSONS; COMPOSITE MODELS; ELEMENTARY PARTICLES; EQUATIONS; HADRONS; MATHEMATICAL MODELS; MESON RESONANCES; MESONS; PARTICLE MODELS; PARTICLE PROPERTIES; POSTULATED PARTICLES; RESONANCE PARTICLES

Optional Information

Notes
1 tab.; 21 refs.