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Experimental evidence for a vector-like behaviour of Pomeron exchange

Abstract : Evidence is presented that the Pomeron act as a non-conserved vector current. A study has been made of the azimuthal angle phi, which is defined as the angle between the pT vectors of the two outgoing protons, in the reaction pp -> pp(X0) for those resonances (X0) which are compatible with being produced by double Pomeron exchange. These distributions have been compared with a model which describes the Pomeron as a non-conserved vector current and a qualitative agreement is found. In addition, when one of the particles exchanged is known to have spin 0, namely pi-Pomeron exchange, the phi distribution is flat.
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http://hal.in2p3.fr/in2p3-00006448
Contributor : Claudine Bombar <>
Submitted on : Thursday, October 5, 2000 - 5:34:52 PM
Last modification on : Friday, November 6, 2020 - 3:34:25 AM

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D. Barberis, F. Binon, F E. Close, K M. Danielsen, S V. Donskov, et al.. Experimental evidence for a vector-like behaviour of Pomeron exchange. Physics Letters B, Elsevier, 1999, 467, pp.165-170. ⟨in2p3-00006448⟩

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