A unitary and causal effective field theory

Journal Article · Mon Oct 24 00:00:00 EDT 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3647186· OSTI ID:21608438

Gasparyan, A M ^[1]; Lutz, M F. M. ^[1]

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1. GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Planckstrasse 1, 64291 Darmstadt (Germany)

We report on a novel scheme based on the chiral Lagrangian. It is used to analyze pion-nucleon scattering, pion photoproduction, and nucleon Compton scattering. Subthreshold partial-wave amplitudes are calculated in chiral perturbation theory and analytically extrapolated with constraints imposed by electromagnetic-gauge invariance, causality and unitarity. Experimental quantities are reproduced up to energies {radical}(s){approx_equal}1300 MeV in terms of the parameters relevant at order Q{sup 3}.

• OSTI ID: 21608438
• Journal Information: AIP Conference Proceedings, Vol. 1374, Issue 1; Conference: MENU 2010: 12. international conference on meson-nucleon physics and the structure of the nucleon, Williamsburg, VA (United States), 31 May - 4 Jun 2010; Other Information: DOI: 10.1063/1.3647186; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CAUSALITY
CHIRAL SYMMETRY
CHIRALITY
COMPTON EFFECT
GAUGE INVARIANCE
INTEGRAL EQUATIONS
LAGRANGIAN FUNCTION
MEV RANGE
NUCLEONS
PARTIAL WAVES
PERTURBATION THEORY
PHOTONS
PHOTOPRODUCTION
PION-NUCLEON INTERACTIONS
PIONS
QUANTUM FIELD THEORY
SCATTERING AMPLITUDES
UNITARITY
AMPLITUDES
BARYONS
BASIC INTERACTIONS
BOSONS
ELASTIC SCATTERING
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
EQUATIONS
FERMIONS
FIELD THEORIES
FUNCTIONS
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
INVARIANCE PRINCIPLES
MASSLESS PARTICLES
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
MESONS
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PSEUDOSCALAR MESONS
SCATTERING
SYMMETRY