/ Experiment-HEP hep-ex/9707021


A Study of the centrally produced pi+ pi- pi+ pi- channel in p p interactions at 450-GeV/c


Barberis, D. ; Beusch, W. ; Binon, F.G. ; Blick, A.M. ; Close, F.E. ; Danielsen, K.M. ; Dolgopolov, A.V. ; Donskov, S.V. ; Earl, B.C. ; Evans, D. ; French, B.R. ; Hino, T. ; Inaba, S. ; Inyakin, A.V. ; Ishida, T. ; Jacholkowski, A. ; Jacobsen, T. ; Khaustov, G.V. ; Kinashi, T. ; Kinson, J.B. ; Kirk, A. ; Klempt, W. ; Kolosov, V. ; Kondashov, A.A. ; Lednev, A.A. ; Lenti, V. ; Malyukov, S. ; Martinengo, P. ; Minashvili, I. ; Myklebost, K. ; Nakagawa, T. ; Norman, K.L. ; Olsen, J.M. ; Peigneux, J.P. ; Polovnikov, S.A. ; Polyakov, V.A. ; Prokoshkin, Yu.D. ; Romanovsky, V. ; Rotscheidt, H. ; Rumyantsev, V. ; Rusakovich, N. ; Samoilenko, V.D. ; Semenov, A. ; Sene, M. ; Sene, R. ; Shagin, P.M. ; Shimizu, H. ; Singovsky, A.V. ; Sobol, A. ; Solovev, A. ; Stassinaki, M. ; Stroot, J.P. ; Sugonyaev, V.P. ; Takamatsu, K. ; Chlachidze, G. ; Tsuru, T. ; Vassiliadis, G. ; Venables, M. ; Villalobos Baillie, O. ; Votruba, M.F. ; Yasu, Y.

Published in: Phys.Lett.
Year: 1997
Vol.: B413
Page No: 217-224
Pages: 14

Abstract: The reaction pp -> pf (pi+pi-pi+pi-) ps has been studied at 450 GeV/c in an experiment designed to search for gluonic states. A spin analysis has been performed and the dPT filter applied. In addition to the well known f1(1285) there is evidence for two JPC=2-+ states called the eta2(1620) and eta2(1875) and a broad scalar called the f0(2000). The production of these states as a function of the dPT kinematical filter shows the behaviour expected for qqbar states. In contrast, there is evidence for two states at 1.45 GeV and at 1.9 GeV which do not show the behaviour observed for qqbar states.

Web-Page: http://alice.cern.ch/format/showfull?sysnb=0253249; http://dx.doi.org/10.1016/S0370-2693(97)01140-4; http://pdglive.lbl.gov/REFERENCE_info1.brl?slacrpp=PHLTA,B413,217; http://www.sciencedirect.com/science?_ob=GatewayURL&_origin=SPIRES&_method=citationSearch&_volkey=03702693%23413%23217%23&_version=1&md5=bf2a2c18003889d928d00801317080a5; http://durpdg.dur.ac.uk/cgi-hepdata/hepreac/3587339


Note: Dedicated to the memory of Yuri Prokoshkin

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