skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Analysis of resonance multipoles from polarization observables in [eta] photoproduction

Abstract

A combined analysis of new eta photoproduction data for total and differential cross sections, target asymmetry, and photon asymmetry is presented. Using a few reasonable assumptions we perform the first model-independent analysis of the E[sub 0+], E[sub 2[minus]], and M[sub 2[minus]] eta photoproduction multipoles. Making use of the well-known A[sub 3/2] helicity amplitude of the D[sub 13](1520) state, we extract its branching ratio to the [eta]N channel, [Gamma][sub [eta]N]/[Gamma]=(0.08[plus minus]0.01)[percent]. At higher energies, we show that the photon asymmetry is extremely sensitive to small multipoles that are excited by photons in the helicity 3/2 state. The new GRAAL photon asymmetry data at higher energy show a clear signal of the F[sub 15](1680) excitation which permits extracting an F[sub 15](1680)[r arrow][eta]N branching ratio of (0.15[sub [minus]0.10][sup +0.35])[percent]. [copyright] [ital 1999] [ital The American Physical Society]

Authors:
; ;  [1];  [2]
  1. (Institut fuer Kernphysik, Johannes Gutenberg-Universitaet, D-55099 Mainz (Germany))
  2. (Center for Nuclear Studies, Department of Physics, The George Washington University, Washington, D.C., 20052 (United States))
Publication Date:
OSTI Identifier:
6326031
Alternate Identifier(s):
OSTI ID: 6326031
Resource Type:
Journal Article
Journal Name:
Physical Review, C
Additional Journal Information:
Journal Volume: 60:3; Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 1-NITROSO-2-NAPHTHOL; D MESONS; D S MESONS; DIFFERENTIAL CROSS SECTIONS; ETA MESONS; HELICITY; PHOTON-NUCLEON INTERACTIONS; PHOTOPRODUCTION; POLARIZATION; RESONANCE PARTICLES; TOTAL CROSS SECTIONS; AROMATICS; BASIC INTERACTIONS; BOSONS; CHARM PARTICLES; CHARMED MESONS; CROSS SECTIONS; ELECTROMAGNETIC INTERACTIONS; ELEMENTARY PARTICLES; HADRONS; HYDROXY COMPOUNDS; INTERACTIONS; MESONS; NAPHTHOLS; NITROSO COMPOUNDS; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; PARTICLE INTERACTIONS; PARTICLE PRODUCTION; PARTICLE PROPERTIES; PHENOLS; PHOTON-BARYON INTERACTIONS; PHOTON-HADRON INTERACTIONS; PSEUDOSCALAR MESONS; REAGENTS; STRANGE MESONS; STRANGE PARTICLES 663410* -- Photonuclear Reactions & Photon Scattering-- (1992-)

Citation Formats

Tiator, L., Drechsel, D., Knoechlein, G., and Bennhold, C. Analysis of resonance multipoles from polarization observables in [eta] photoproduction. United States: N. p., 1999. Web. doi:10.1103/PhysRevC.60.035210.
Tiator, L., Drechsel, D., Knoechlein, G., & Bennhold, C. Analysis of resonance multipoles from polarization observables in [eta] photoproduction. United States. doi:10.1103/PhysRevC.60.035210.
Tiator, L., Drechsel, D., Knoechlein, G., and Bennhold, C. Wed . "Analysis of resonance multipoles from polarization observables in [eta] photoproduction". United States. doi:10.1103/PhysRevC.60.035210.
@article{osti_6326031,
title = {Analysis of resonance multipoles from polarization observables in [eta] photoproduction},
author = {Tiator, L. and Drechsel, D. and Knoechlein, G. and Bennhold, C.},
abstractNote = {A combined analysis of new eta photoproduction data for total and differential cross sections, target asymmetry, and photon asymmetry is presented. Using a few reasonable assumptions we perform the first model-independent analysis of the E[sub 0+], E[sub 2[minus]], and M[sub 2[minus]] eta photoproduction multipoles. Making use of the well-known A[sub 3/2] helicity amplitude of the D[sub 13](1520) state, we extract its branching ratio to the [eta]N channel, [Gamma][sub [eta]N]/[Gamma]=(0.08[plus minus]0.01)[percent]. At higher energies, we show that the photon asymmetry is extremely sensitive to small multipoles that are excited by photons in the helicity 3/2 state. The new GRAAL photon asymmetry data at higher energy show a clear signal of the F[sub 15](1680) excitation which permits extracting an F[sub 15](1680)[r arrow][eta]N branching ratio of (0.15[sub [minus]0.10][sup +0.35])[percent]. [copyright] [ital 1999] [ital The American Physical Society]},
doi = {10.1103/PhysRevC.60.035210},
journal = {Physical Review, C},
issn = {0556-2813},
number = ,
volume = 60:3,
place = {United States},
year = {1999},
month = {9}
}