Study ofηπ+π− in the ϱ′(1600) mass region photoproduced in the reaction γp→ηπ+π− p at photon energies of 20 to 70 GeV

M Atkinson ,D Mercer,M Davenport,R E Hughes-Jones,V Liebenau,H Rotscheidt,D Newton,G N Patrick,H Marsiske,I O Skillicorn,R J Ellison,B Dickinson,A Donnachie,M Reidenbach,J B Dainton,W Galbraith,R C W Henderson,M Ibbotson,A P Waite,J S Hutton,J Laberrigue,T P Yiou,T J Brodbeck,A Schlösser,M F Worsell,Ch De La Vaissière ,J Bunn ,E Paul ,P Bussey ,C Raine ,G Lafferty ,H.‐P Jakob ,T Axon ,Richard Mcclatchey ,D Barberis ,B R Kumar ,K M Smith ,J A G Morris ,M Jung ,P Flower ,C Paterson ,J M Lévy ,Graham Brookes ,J.b Lane ,K.m Storr ,J V Morris ,J C Lassalle ,K Héinloth ,A.b Clegg ,B Diekmann ,P Sharp ,R J Thompson ,Phil Flynn

doi:10.1007/bf01571800

Study ofηπ+π− in the ϱ′(1600) mass region photoproduced in the reaction γp→ηπ+π− p at photon energies of 20 to 70 GeV

M Atkinson , D Mercer + Show 51 more

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https://doi.org/10.1007/bf01571800

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Journal: Zeitschrift für Physik C: Particles and Fields	Publication Date: Dec 1, 1986
Citations: 14

Affiliation: University of Bonn, Lancaster University, European Organization for Nuclear Research, University of Glasgow, University of Sheffield, Sorbonne University

#Spin-parity Analysis #Reaction Γp + Show 6 more

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Abstract

In diffractive photoproduction ofηπ+π−, the two-body substatesηρ0 andA 2π are found to contribute significantly to the cross-section forηπ+π− masses below 2.4 GeV. From a spin-parity analysis the branching ratio, ρ′(1600)→ηρ/ρ′(1600)→, is determined to be <0.02 at the 68.3% confidence level. TheA 2π component shows an enhancement around 1.7 GeV. The spin-parity analysis indicates a probable contribution to this signal from exclusive photoproduction of theg(1690).

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