A study of the centrally produced [formula omitted]and φω systems in pp interactions at 450 GeV/c

D Barberis,O Villalobos Baillie,W Klempt,A Semenov,J.B Kinson,W Beusch,V.A Polyakov,V.P Sugonyaev,G.V Khaustov,S Maljukov,H Rotscheidt,G Tchlatchidze,T Kinashi,A.A Lednev,B.C Earl,M Sené,A Kirk,T Jacobsen,V Romanovsky,A.M Blick,M Stassinaki,M Venables,M.F Votruba,R Sené,V.D Samoylenko,V Lenti,K.L Norman,T Tsuru,K Takamatsu,A.V Singovsky,D Evans,A.V Inyakin,T Hino,H Shimizu,J.P Peigneux,K.M Danielsen,S Inaba,S.V Donskov,A Sobol,P Martinengo,V.n Kolosov ,А А Кондашов ,Jean-Pierre Stroot ,J T ,A Dolgopolov ,Frank Close ,Toru Ishida ,A.g Solovjev ,I A Minashvili ,P Shagin ,Freddy Binon ,B R French ,A Jachołkowski ,Y Yasu,S.A Polovnikov,N Russakovich,V Rumyantsev,T Nakagawa

doi:10.1016/s0370-2693(98)00962-9

Abstract

A study of the reactions pp→ p f p s ( K + K − π + π −) and pp→ p f p s ( K + K − π + π − π 0) shows evidence for the K ∗(892) K ∗(892) and φω channels respectively. The K ∗(892) K ∗(892) mass spectrum shows a broad distribution with a maximum near threshold and an angular analysis shows that it is compatible with having J P =2 +. The behaviour of the cross-section as a function of centre of mass energy, and the four momentum transfer dependence, are compatible with what would be expected if the K ∗(892) K ∗(892) system was produced via double Pomeron exchange. The dP T behaviour of the φω channel is similar to what has been observed for all the undisputed q q states. In contrast, the dP T behaviour of the K ∗(892) K ∗(892) final state is similar to what has been observed for the φφ final state and for previously observed glueball candidates.

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