Nucleon-Nucleon Correlations and Six-Quark-Cluster Effects in Semi-Inclusive Deep-Inelastic Lepton Scattering off Few-Nucleon Systems

Abstract

Semi-inclusive deep inelastic lepton scattering off few-nucleon systems is investigated assuming that virtual boson absorption occurs on a hadronic cluster which can be either a two-nucleon correlated pair or a six-quark bag. In both cases the relevance of nuclear effects on forward and backward nucleon emissions is illustrated and the differences expected in the energy distribution of the emitted nucleons are analyzed both at x < 1 and x > 1.

Probing the origin of the EMC effect via tagged structure functions of the deuteron

“…In Fig.1 we illustrate the α s dependence of the ratio of the (light-cone) spectral function including FSI effects within the DWIA, Eq. (27), to that calculated without FSI effects. At extreme backward kinematics (p T ≈ 0) one sees that FSI effects contribute less than ∼ 5% to the overall uncertainty of the d(e, e ′ N)X cross section for α s < ∼ 1.5.…”

“…At larger p T ( > ∼ 0.3 GeV/c), and small α s (≈ 1), the double scattering contribution (which is not present for the extreme backward case in Eq. (27)) plays a more important role in FSI [23]. Because its sign is positive, it tends to cancel some of the absorption effects of FSI at large p T (for a detailed discussion of the double scattering contribution in FSI see Ref.…”

“…(Other models which have been used in studies of semi-inclusive DIS include the six-quark cluster models discussed in Refs. [26,27]. )…”

“…[23,24], and replacing the p-n rescattering cross section by an effective cross section for the p(n)-X interaction, Eq. (27). For the effective cross section σ ef f one can use the results of the recent analysis [21] of soft neutron production in the high-energy deep-inelastic scattering of muons from heavy nuclei [22], which yielded an upper limit of σ ef f ≈ 20 mb.…”

Q2dependence of deep inelastic lepton scattering off nuclear targets

“…More recently, the convolution approach has been also extended to study semi-inclusive processes [4][5][6] The kinematical region corresponding to DIS is defined by the Bjorken limit: Q 2 , ν → ∞ with x finite, implying (|q|/ν) → 1. In this limit the quantity z of eq.…”