Published December 2018 | Version v1
Journal article Metadata-only

A new parametrization for the scalar pion form factors

Creators

  • 1. Universitaet Bonn, Helmholtz-Institut fuer Strahlen- und Kernphysik (Theorie) and Bethe Center for Theoretical Physics, Bonn (Germany)
  • 2. Forschungszentrum Juelich, Institut fuer Kernphysik, Institute for Advanced Simulation, and Juelich Center for Hadron Physics, Juelich (Germany)

Description

We derive a new parametrization for the scalar pion form factors that allows us to analyze data over a large energy range via the inclusion of resonances, and at the same time to ensure consistency with the high-accuracy dispersive representations available at low energies. As an application the formalism is used to extract resonance properties of excited scalar mesons from data for anti B0s → J/ψππ. In particular we find for the pole positions of f0(1500) and f0(2020) 1465 ± 18 - i(50 ± 9) MeV and 1910 ± 50 - i(199 ± 40) MeV, respectively. In addition, from their residues we calculate the respective branching ratios into ππ to be (58 ± 31)% and (1.3 ± 1.8)%. (orig.)

Availability note (English)

Available from: http://dx.doi.org/10.1140/epjc/s10052-018-6416-6

Additional details

Identifiers

DOI
10.1140/epjc/s10052-018-6416-6;

Publishing Information

Journal Title
European Physical Journal. C, Particles and Fields (Online)
Journal Volume
78
Journal Issue
12
Journal Page Range
p. 1-18
ISSN
1434-6052

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
50009911
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Resource subtype / Literary indicator
Numerical Data
Descriptors DEI
B S MESONS; BETHE-SALPETER EQUATION; BRANCHING RATIO; COUPLING CONSTANTS; DECAY AMPLITUDES; F0-980 MESONS; FINAL-STATE INTERACTIONS; FORM FACTORS; HADRONIC PARTICLE DECAY; KAONS; MATRIX ELEMENTS; PION-PION INTERACTIONS; PIONS; RESCATTERING; RESONANCE PARTICLES; SCATTERING AMPLITUDES; SINGULARITY; THEORETICAL DATA; WEAK HADRONIC DECAY
Descriptors DEC
AMPLITUDES; BEAUTY MESONS; BEAUTY PARTICLES; BOSONS; DATA; DECAY; DIMENSIONLESS NUMBERS; ELEMENTARY PARTICLES; EQUATIONS; HADRON-HADRON INTERACTIONS; HADRONS; INFORMATION; INTERACTIONS; MESON-MESON INTERACTIONS; MESONS; NUMERICAL DATA; PARTICLE DECAY; PARTICLE INTERACTIONS; PARTICLE PROPERTIES; PSEUDOSCALAR MESONS; SCALAR MESONS; SCATTERING; STRANGE MESONS; STRANGE PARTICLES; TRANSITION AMPLITUDES; WEAK PARTICLE DECAY