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Experimental evidence for a vector-like behaviour of Pomeron exchange

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arxiv hep-ex/9909013 v1 pith:KYMCB6OC submitted 1999-09-08 hep-ex

classification hep-ex
keywords pomeronexchangeanglebeencurrentevidencenon-conservedvector
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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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  1. Central exclusive production of $\eta$ and $\eta'$ mesons in diffractive proton-proton collisions at the LHC within the tensor-pomeron approach

    hep-ph 2025-06 conditional novelty 5.0 of 10

    The tensor-pomeron model predicts 0.3 to 0.7 microbarn cross sections for central eta-prime production at the LHC, and shows that scalar-pomeron models forbid eta, eta-prime, and f1 production entirely.

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