Double pomeron exchange in the reaction ifpp → ppπ+π− at ISR energies |
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| Authors: | D. Drijard H.G. Fischer R. Gokieli P.G. Innocenti V. Korbel A. Minten A. Norton R. Sosnowski S. Stein H.D. Wahl M. Della Negra G. Fontaine P. Frenkiel C. Ghesquiere D. Linglin G. Sajot H. Frehse D. Wegener |
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| Affiliation: | CERN, European Organization for Nuclear Research, Geneva, Switzerland;Collège de France, Paris, France;Institut für Hochenergiephysik der Universität Heidelberg, Germany |
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| Abstract: | Using the split field magnet (SFM) of the CERN ISR, we have investigated the main features of the reaction pp → ppπ+π? in the kinematical region where double pomeron exchange (DPE) is supposed to play an important rôle. Using kinematically fitted events at the five standard ISR energies from √s = 23.4 GeV to √s = 63.4 GeV, we have studied different data subsamples as a means of distinguishing DPE from the tail of single diffraction (SD). Our results are compatible with a significant DPE contribution; in particular there is no correlation between the two protons and the s- and t-dependences follow the expected behaviour. |
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| Keywords: | CCHK Collaboration |
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