Photoproduction of pseudoscalar mesons off nuclei at forward angles

Abstract

With the advent of new photon tagging facilities and novel experimental technologies it has become possible to perform photoproduction cross section measurements of pseudoscalar mesons on nuclei with * Corresponding author:gevs@jlab.org. On leave of absence from Yerevan Physics Institute 1 arXiv:0903.4715v1 [hep-ph]

Nuclear incoherent photoproduction ofπ0andηfrom 4 to 12 GeV

“…11(a)] differ in shape and magnitude from the recent results published in Ref. [4]. For instance, at θ π 0 ∼ 0 0 , we found ∼2.3 mb instead of ∼1 mb, found in Ref.…”

“…For instance, at θ π 0 ∼ 0 0 , we found ∼2.3 mb instead of ∼1 mb, found in Ref. [4]. Moreover, at approximately 1 • , we found 11.5 mb while ∼3 mb is reported in Ref.…”

“…Moreover, at approximately 1 • , we found 11.5 mb while ∼3 mb is reported in Ref. [4]. The predictions match around 2 • (∼28 mb) and also differ at higher angles, where we found ∼49 mb at 4 • , in comparison with ∼62 mb found in Ref.…”

“…The comparison between our results for π 0 photoproduction with the recent results from Ref. [4] will be presented in Sec. IV.…”

“…The calculation of the nuclear amplitude for incoherent photoproduction can also be performed under the context of the Glauber model [2]. The main advantage of the Glauber approach is that the integral formalism allows the derivation of analytical and general expressions for the incoherent photoproduction cross section, as recently proposed by S. Gevorkyan et al [4]. However, as discussed further in this article, the Glauber approach has some limitations to account for short-range correlations in secondary meson-nucleon scatterings, local density fluctuations, and energy losses due to the nuclear excitation and meson-nucleus final-state interactions (FSI).…”