Published September 2018 | Version v1
Journal article Metadata-only

η' → ηππ decays in unitarized resonance chiral theory

Creators

  • 1. Chinese Academy of Sciences, CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Beijing (China)
  • 2. Thomas Jefferson National Accelerator Facility, Theory Center, Newport News, VA (United States)
  • 3. Indiana University, Center for Exploration of Energy and Matter, Bloomington, IN (United States)
  • 4. Indiana University, Department of Physics, Bloomington, IN (United States)

Description

We study the hadronic η' → ηππ decays within the framework of U(3)L x U(3)R Chiral Perturbation Theory including resonance states and the complete one-loop corrections. The amplitude is projected in partial waves and unitarized by means of the N / D method resumming both the important S- and D-wave ππ and the subleading S-wave πη final-state interactions. The participating scalar multiplet mass and coupling strengths are determined from fits to the Dalitz plot experimental data recently released by the A2 collaboration. As a byproduct of our analysis, the associated Dalitz-plot slope parameters are found to be a = -0.072(7)stat(8)syst, b = -0.052(1)stat(2)syst, d = -0.051(8)stat(6)syst, which lie in the ballpark of the current experimental and theoretical determinations. (orig.)

Availability note (English)

Available from: http://dx.doi.org/10.1140/epjc/s10052-018-6238-6

Additional details

Identifiers

DOI
10.1140/epjc/s10052-018-6238-6;

Publishing Information

Journal Title
European Physical Journal. C, Particles and Fields (Online)
Journal Volume
78
Journal Issue
9
Journal Page Range
p. 1-26
ISSN
1434-6052

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
49098155
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Resource subtype / Literary indicator
Numerical Data
Descriptors DEI
BRANCHING RATIO; CHIRAL SYMMETRY; CHIRALITY; COUPLING CONSTANTS; DALITZ PLOT; DECAY AMPLITUDES; EFFECTIVE MASS; ETA PRIME-958 MESONS; FINAL-STATE INTERACTIONS; HADRONIC PARTICLE DECAY; LEAST SQUARE FIT; MASS SPECTRA; N-D METHOD; PARTICLE WIDTHS; PERTURBATION THEORY; PION-PION INTERACTIONS; REST MASS; SCALAR MESONS; THEORETICAL DATA; U-3 GROUPS
Descriptors DEC
AMPLITUDES; BOSONS; CALCULATION METHODS; DATA; DECAY; DIAGRAMS; DIMENSIONLESS NUMBERS; ELEMENTARY PARTICLES; HADRON-HADRON INTERACTIONS; HADRONS; INFORMATION; INTERACTIONS; LIE GROUPS; MASS; MATHEMATICAL SOLUTIONS; MAXIMUM-LIKELIHOOD FIT; MESON-MESON INTERACTIONS; MESONS; NUMERICAL DATA; NUMERICAL SOLUTION; PARTICLE DECAY; PARTICLE INTERACTIONS; PARTICLE PROPERTIES; PSEUDOSCALAR MESONS; SCATTERPLOTS; SPECTRA; SYMMETRY; SYMMETRY GROUPS; TRANSITION AMPLITUDES; U GROUPS