Experimental evidence for a vector-like behaviour of Pomeron exchange

Citation
D. Barberis et al., Experimental evidence for a vector-like behaviour of Pomeron exchange, PHYS LETT B, 467(1-2), 1999, pp. 165-170
Citations number
19
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS B
ISSN journal
0370-2693 → ACNP
Volume
467
Issue
1-2
Year of publication
1999
Pages
165 - 170
Database
ISI
SICI code
0370-2693(19991111)467:1-2<165:EEFAVB>2.0.ZU;2-R
Abstract
Evidence is presented that the Pomeron acts as a non-conserved vector curre nt. A study has been made of the azimuthal angle phi, which is defined as t he angle between the p(T) vectors of the two outgoing protons, in the react ion pp-->pp(X-0) for those resonances (X-0) which are compatible with being produced by double Pomeron exchange. These distributions have been compare d with a moder which describes the Pomeron as a non-conserved vector curren t and a qualitative agreement is found. In addition, when one of the partic les exchanged is known to have spin 0, namely pi-Pomeron exchange, the phi distribution is flat. (C) 1999 Elsevier Science B.V. All rights reserved.