Associative photoproduction of roper resonance with vector mesons
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Date
2000-10
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Publisher
Turkish Atomic Energy Authority
Abstract
We examine the associative photoproduction of Roper resonance with vector mesons,
γ +N—>N* ( 1440)+V. in the near threshold region by using the analogy with the processes of
“elastic” vector meson photoproduction, γ +N—>N+V. Different production mechanisms are
suggested. In addition to standart α- and π-exchanges in the t-channel, the baryonic exchanges in
the s- and u-channel are taken into account as well. We calculate the differential cross-section
and beam asymmetry on proton and neutron targets for the reaction γ+N—>N*(1440)+ω. All
calculations are performed at Eγ,= 2.5 GeV.
The recent study [1] on the associative photoproduction o f Roper resonance with vector mesons,
γ+N —>N*(1440)+V, in the near threshold region indicates the importance of the pseudoscalar (π)
exchange for t-channel in associative ω-meson photoproduction but it does not give a clear
information about the relative role of different possible threshold mechanisms on the production
o f N*(1440). Therefore, in additon to standart G- and δ-exchanges in the t-channel, we consider
the baryonic resonances in the s- and u-channel .
For t-channel, the pseudoscalar (π) and scalar exchanges ( δ ), Fig. 1(a), are considered The
pseudoscalar exchange amplitude can be obtained from the Lagrangian,....
Description
I. Avrasya Nükleer Bilimler ve Uygulamaları Konferansı : 23-27 Ekim 2000. İzmir, Türkiye.
Keywords
Vector mesons, Vektör mezonlar, Roper resonanc, Roper rezonans, Photoproduction, Fotoproduction
Citation
Babacan, T. ... [ve arkadaşları]., (2000). Associative photoproduction of roper resonance with vector mesons. I. Eurasia Conference on Nuclear Science and Its Application, Presentations, Vol 2, (s. 843-845). 23-27 October 2000. İzmir, Turkey.