Imperial College London

Emeritus Professor Peter Dornan FRS, FInstP

Faculty of Natural SciencesDepartment of Physics

Senior Research Investigator



+44 (0)20 7594 7822p.dornan Website




Ms Paula Brown +44 (0)20 7594 7823




507Blackett LaboratorySouth Kensington Campus






BibTex format

author = {Althoff, M and Braunschweig, W and Gather, K and Kirschfink, FJ and Lübelsmeyer, K and Martyn, HU and Peise, G and Rimkus, J and Sander, HG and Schmitz, D and Siebke, H and Trines, D and Wallraff, W and Boerner, H and Fischer, HM and Hartmann, H and Hilger, E and Hillen, W and Knop, G and Köpke, L and Kolanoski, H and Wedemeyer, R and Wermes, N and Wollstadt, M and Burkhardt, H and Cooper, S and Franzke, J and Hultschig, H and Joos, P and Koch, W and Kötz, U and Kowalski, H and Ladage, A and Löhr, B and Lüke, D and Mättig, P and Mess, KH and Notz, D and Pyrlik, J and Quarrie, DR and Riethmüller, R and Schütte, W and Söding, P and Wolf, G and Yekutieli, G and Dittmar, M and Fohrmann, R and Krasemann, HL and Leu, P and Lohrmann, E and Pandoulas, D and Poelz, G and Römer, O and Schmüser, P and Wiik, BH and Al-Agil, I and Beuselinck, R and Binnie, DM and Campbell, AJ and Dornan, PJ and Garbutt, DA and Jones, TD and Jones, WG and Lloyd, SL and McCardle, J and Sedgebeer, JK and Bell, KW and },
doi = {10.1007/BF01573742},
journal = {Zeitschrift für Physik C Particles and Fields},
pages = {13--25},
title = {Angular correlations in γγ→ρ<sup>0</sup>ρ<sup>0</sup> near threshold},
url = {},
volume = {16},
year = {1982}

RIS format (EndNote, RefMan)

AB - We present an analysis of ρ0ρ0 production by two photons in the ρ0ρ0 invariant mass range from 1.2 to 2.0 GeV. From a study of the angular correlations in the process γγ→ρ0ρ0→π- π+π- we exclude a dominant contribution from JP=0- or 2- states. The data indicate sizeable contributions from JP=0+ for four pion masses M4π<1.7 GeV and from JP=2+ for M4π>1.7 GeV. The data are also well described by a model with isotropic production and uncorrelated isotropic decay of the ρ0,s. The cross section stays high below the nominal ρ0ρ0 threshold, i.e. M4π<1.5 GeV. The matrix element for ρ0ρ0 production is found to decrease steeply with increasing M4π. Upper limits for the couplings of the ι(1440) and Θ(1640) to γγ and ρ0ρ0 are given:Γ(ι→γγ)·B(ι→ρ 0ρ0)<1.0 keV and Γ(Θ→γγ) © 1982 Springer-Verlag.
AU - Althoff,M
AU - Braunschweig,W
AU - Gather,K
AU - Kirschfink,FJ
AU - Lübelsmeyer,K
AU - Martyn,HU
AU - Peise,G
AU - Rimkus,J
AU - Sander,HG
AU - Schmitz,D
AU - Siebke,H
AU - Trines,D
AU - Wallraff,W
AU - Boerner,H
AU - Fischer,HM
AU - Hartmann,H
AU - Hilger,E
AU - Hillen,W
AU - Knop,G
AU - Köpke,L
AU - Kolanoski,H
AU - Wedemeyer,R
AU - Wermes,N
AU - Wollstadt,M
AU - Burkhardt,H
AU - Cooper,S
AU - Franzke,J
AU - Hultschig,H
AU - Joos,P
AU - Koch,W
AU - Kötz,U
AU - Kowalski,H
AU - Ladage,A
AU - Löhr,B
AU - Lüke,D
AU - Mättig,P
AU - Mess,KH
AU - Notz,D
AU - Pyrlik,J
AU - Quarrie,DR
AU - Riethmüller,R
AU - Schütte,W
AU - Söding,P
AU - Wolf,G
AU - Yekutieli,G
AU - Dittmar,M
AU - Fohrmann,R
AU - Krasemann,HL
AU - Leu,P
AU - Lohrmann,E
AU - Pandoulas,D
AU - Poelz,G
AU - Römer,O
AU - Schmüser,P
AU - Wiik,BH
AU - Al-Agil,I
AU - Beuselinck,R
AU - Binnie,DM
AU - Campbell,AJ
AU - Dornan,PJ
AU - Garbutt,DA
AU - Jones,TD
AU - Jones,WG
AU - Lloyd,SL
AU - McCardle,J
AU - Sedgebeer,JK
AU - Bell,KW
AU - Bowler,MG
AU - Brock,IC
AU - Cashmore,RJ
AU - Carnegie,R
AU - Clarke,PEL
AU - Devenish,R
AU - Grossmann,P
AU - Illingworth,J
AU - Salmon,GL
AU - Thomas,J
AU - Wyatt,TR
AU - Youngman,C
AU - Foster,B
AU - Hart,JC
AU - Harvey,J
AU - Proudfoot,J
AU - Saxon,DH
AU - Woodworth,PL
AU - Heyland,D
AU - Holder,M
AU - Duchovni,E
AU - Eisenberg,Y
AU - Karshon,U
AU - Mikenberg,G
AU - Revel,D
AU - Ronat,E
AU - Shapira,A
AU - Barklow,T
AU - Meyer,T
AU - Rudolph,G
AU - Venkataramania,H
AU - Wicklund,E
AU - Wu,SL
DO - 10.1007/BF01573742
EP - 25
PY - 1982///
SN - 0170-9739
SP - 13
TI - Angular correlations in γγ→ρ<sup>0</sup>ρ<sup>0</sup> near threshold
T2 - Zeitschrift für Physik C Particles and Fields
UR -
VL - 16
ER -