η photo-production on the deuteron at LNS, Tohoku University

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The differential and total cross sections were measured for the γp → ηp and γd → ηpn reactions at Eγ ≤ 1150 MeV by using an electro-magnetic (EM) calorimeter SCISSORS II at the Laboratory of Nuclear Science (LNS), Tohoku University. The total cross section on the deuteron shows a bump around Eγ = 1 GeV, while no bump is observed in the same energy region of that on the proton. This bump is attributed to be a nucleon resonance excited from the neutron, and it is a candidate of anti-decuplet penta-quark baryons with hidden strangeness. It was difficult, however, to detect all the γ's coming from η decay since the solid angle of SCISSORS II was only 12.6% in total. Statistics of the detected η produced events is poor and systematic uncertainty of the obtained cross section is not small due to low acceptance. A new EM calorimeter complex called FOREST with a solid angle of about 4π sr has been constructed. The spin and parity of the relevant resonance are expected to be determined by the experiments with FOREST.

Original languageEnglish
Title of host publicationProceedings of the Sendai International Symposium
Subtitle of host publicationStrangeness in Nuclear and Hadronic Systems, SENDAI 2008
Pages101-107
Number of pages7
Publication statusPublished - 2010 Dec 1
EventSendai International Symposium on Strangeness in Nuclear and Hadronic Systems, SENDAI 2008 - Sendai, Japan
Duration: 2008 Dec 142008 Dec 18

Publication series

NameProceedings of the Sendai International Symposium: Strangeness in Nuclear and Hadronic Systems, SENDAI 2008

Other

OtherSendai International Symposium on Strangeness in Nuclear and Hadronic Systems, SENDAI 2008
CountryJapan
CitySendai
Period08/12/1408/12/18

Keywords

  • Electro-magnetic calorimeter
  • Hidden strangeness
  • Nucleon resonances

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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