Polarization measurements in neutral pion photoproduction

Research output: Contribution to journalArticle

Abstract

We present measurements of the recoil proton polarization for the H-1((γ) over right arrow,(p) over right arrow)pi(0) reaction for theta(c.m.)(pi) = 60degrees-135degrees and for photon energies up to 4.1 GeV. These are the first data in this reaction for polarization transfer with circularly polarized photons. Various theoretical models are compared with the results. No evidence for hadron helicity conservation is observed. Models that employ factorization are not favored. It appears from the strong angular dependence of the induced polarization at photon energies of 2.5 and 3.1 GeV that a relatively high spin resonance or background amplitude might exist in this energy region.

Details

Authors
  • K Wijesooriya
  • A Afanasev
  • M Amarian
  • K Aniol
  • S Becher
  • K Benslama
  • L Bimbot
  • P Bosted
  • EJ Brash
  • J Calarco
  • Z Chai
  • CC Chang
  • T Chang
  • JP Chen
  • S Choi
  • E Chudakov
  • S Churchwell
  • D Crovelli
  • S Dieterich
  • S Dumalski
  • D Dutta
  • M Epstein
  • B Fox
  • S Frullani
  • H Gao
  • J Gao
  • F Garibaldi
  • O Gayou
  • R Gilman
  • A Glamazdin
  • C Glashausser
  • J Gomez
  • V Gorbenko
  • O Hansen
  • RJ Holt
  • J Hovdebo
  • GM Huber
  • CW de Jager
  • X Jiang
  • C Jones
  • MK Jones
  • J Kelly
  • E Kinney
  • E Kooijman
  • G Kumbartzki
  • M Kuss
  • J LeRose
  • M Liang
  • R Lindgren
  • N Liyanage
  • S Malov
  • DJ Margaziotis
  • P Markowitz
  • K McCormick
  • D Meekins
  • ZE Meziani
  • R Michaels
  • J Mitchell
  • L Morand
  • CF Perdrisat
  • R Pomatsalyuk
  • V Punjabi
  • RD Ransome
  • R Roche
  • M Rvachev
  • A Saha
  • A Sarty
  • EC Schulte
  • D Simon
  • S Strauch
  • R Suleiman
  • L Todor
  • PE Ulmer
  • GM Urciuoli
  • B Wojtsekhowski
  • F Xiong
  • W Xu
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Subatomic Physics
Original languageEnglish
JournalPhysical Review C (Nuclear Physics)
Volume66
Issue number3
Publication statusPublished - 2002
Publication categoryResearch
Peer-reviewedYes

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