Near threshold photoproduction of η mesons from 4 He

6533b872fe1ef96bd12d2def

RESEARCH PRODUCT

Near threshold photoproduction of η mesons from 4 He

V. Kuhr Matthias Wolf F. Rambo V. Olmos De León V. Hejny Patrick Achenbach M. Kotulla V. Metag J. Weiß J. Ahrens S.j. Hall R. Leukel H. Ströher F. Wissmann R. Beck B. Krusche A. Schmidt R.o. Owens Martin Schumacher U. Siodlaczek R. W. Novotny

subject

Physics Nuclear and High Energy Physics Particle physics Photon Meson 010308 nuclear & particles physics Nuclear Theory Hadron Photon energy 01 natural sciences 7. Clean energy Nuclear physics Recoil 0103 physical sciences High Energy Physics::Experiment Neutron Nuclear Experiment 010306 general physics Nucleon Microtron

description

Photoproduction of η mesons from 4He has been measured for the first time. The experiment was performed at the Mainz Microtron (MAMI) using the TAPS photon spectrometer and the Glasgow/Mainz tagged photon facility. η mesons were identified in coincidence with recoil nucleons. Total and differential cross sections are presented in the photon energy range between threshold and 818 MeV. The exclusive data are used to determine the ratio of the elementary production cross sections on bound neutrons and protons, σn/σp= 0.68 ± 0.02 ± 0.09. In addition, upper limits for the total coherent cross section have been derived.

year	journal	country	edition	language
1999-09-01	The European Physical Journal A

https://doi.org/10.1007/s100500050320

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