Inelastic photoproduction of polarised $J/ψ$

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dc.creatorBeneke, M.
dc.creatorKrämer, M.
dc.creatorVänttinen, M.
dc.date1997-09-17
dc.date.accessioned2026-07-07T11:35:24Z
dc.date.available2026-07-07T11:35:24Z
dc.descriptionThe comparison of $J/ψ$ photoproduction data in the inelastic region with theoretical predictions based on the NRQCD approach has remained somewhat ambiguous and controversial, in particular at large values of the inelasticity variable $z$. We study the polar and azimuthal decay angular distribution of $J/ψ$ mesons as functions of $z$ and transverse momentum $p_t$. Future measurements of decay angular distributions at the HERA $ep$ collider will provide a new test of theoretical approaches to factorisation between perturbation theory and quarkonium bound-state dynamics and shed light on the colour-octet production fraction in various regions of $z$ and $p_t$.
dc.description35 pages, LaTeX, 8 figures included via epsf.sty
dc.identifierhttps://arxiv.org/abs/hep-ph/9709376
dc.identifierhttp://arxiv.org/abs/hep-ph/9709376
dc.identifierPhys.Rev.D57:4258-4274,1998
dc.identifierdoi:10.1103/PhysRevD.57.4258
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/198579
dc.subjectHigh Energy Physics - Phenomenology
dc.titleInelastic photoproduction of polarised $J/ψ$
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