Exclusive photoproduction of $J/ψ$ in proton-proton and proton-antiproton scattering
| dc.creator | Schäfer, W. | |
| dc.creator | Szczurek, A. | |
| dc.date | 2007-05-20 | |
| dc.date | 2007-08-21 | |
| dc.date.accessioned | 2026-07-07T10:55:43Z | |
| dc.date.available | 2026-07-07T10:55:43Z | |
| dc.description | Protons and antiprotons at collider energies are a source of high energy Weizsäcker--Williams photons. This may open a possibility to study exclusive photoproduction of heavy vector mesons at energies much larger than possible at the HERA accelerator. Here we present a detailed investigation of the exclusive $J/ψ$ photoproduction in proton-proton (RHIC, LHC) and proton-antiproton (Tevatron) collisions. We calculate several differential distributions in $t_1, t_2, y, ϕ$, as well as transverse momentum distributions of $J/Ψ$'s. We discuss correlations in the azimuthal angle between outgoing protons or proton and antiproton as well as in the ($t_1, t_2$) space. Differently from electroproduction experiments, here both colliding beam particles can be a source of photons, and we find large interference terms in azimuthal angle distributions in a broad range of rapidities of the produced meson. We also include the spin--flip parts in the electromagnetic vertices. We discuss the effect of absorptive corrections on various distributions. Interestingly, absorption corrections induce a charge asymmetry in rapidity distributions, and are larger for $p p$ reactions than for the $p \bar p$ case. The reaction considered here constitutes an important nonreduceable background in recently proposed searches for odderon exchange. | |
| dc.description | 22 pages, 20 figures; dedicated to Kolya Nikolaev on the occasion of his 60th birthday; 4 figures and discussion added | |
| dc.identifier | https://arxiv.org/abs/0705.2887 | |
| dc.identifier | http://arxiv.org/abs/0705.2887 | |
| dc.identifier | Phys.Rev.D76:094014,2007 | |
| dc.identifier | doi:10.1103/PhysRevD.76.094014 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/186166 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Exclusive photoproduction of $J/ψ$ in proton-proton and proton-antiproton scattering | |
| dc.type | text |