Relativistic structure of the deuteron: Electrodisintegration and<i>y</i>scaling

Atti, C. Ciofi degli; Faralli, D.; Umnikov, A. Yu.; Kaptari, L. P.

doi:10.1103/physrevc.60.034003

Cited by 70 publications

(197 citation statements)

References 39 publications

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“…[22] to nicely describe the data measured at JLab [23], corresponding to the unpolarized spectator SiDIS off the deuteron. In particular, σ e f f (z 1i ) is the cross section for the interaction of the formed hadrons (assumed to be a nucleon and a few pions) with the remnant nucleons, and is given by the sum of two contributions: i) the nucleon-nucleon cross section and ii) and the product of the nucleon-pion cross section times the effective number of pions which are produced (cf Ref.…”

Section: Distorted Spin-dependent Spectral Function For Hementioning

confidence: 99%

“…and P FS I || can be very different, but the relevant observables for the SSAs involve integrals, dominated by the low momentum region, where the FSI effects on P || are minimized and the spectral function is large [22]. …”

Section: |mentioning

confidence: 99%

“…The GEA was already succesfully applied to unpolarized SiDIS in Ref. [22]. The FSI effects to be considered are due to the propagation of the debris, formed after the γ * absorption by a target quark, and the subsequent hadronization, both of them influenced by the presence of a fully interacting (A − 1) spectator system (see Fig.…”

Section: Distorted Spin-dependent Spectral Function For Hementioning

confidence: 99%

“…(6) is the ratio of the real to the imaginary part of the forward scattering amplitude of the process. In our calculation it has been taken constant, namely, α = 0.5, following [22]. Finally, the slope parameter, b 0 , is determined by the optical theorem, which yields…”

Section: Distorted Spin-dependent Spectral Function For Hementioning

confidence: 99%

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Transverse momentum distributions and nuclear effects

Pace

Dotto

Kaptari

et al. 2015

EPJ Web of Conferences

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Abstract. A distorted spin-dependent spectral function for 3 He is considered to take care of the final state interaction in the extraction of the quark transverse-momentum distributions in the neutron from semi-inclusive deep inelastic electron scattering off polarized 3 He at finite momentum transfers. The generalization of the analysis in a Poincaré covariant framework within the light-front dynamics is outlined. The definition of the light-front spin-dependent spectral function for a J=1/2 system, as the nucleon, allows us to show that within the light-front dynamics and in the valence approximation only three of the six leading twist T-even transversemomentum distributions are independent.

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Section: Distorted Spin-dependent Spectral Function For Hementioning

confidence: 99%

Section: |mentioning

confidence: 99%

Section: Distorted Spin-dependent Spectral Function For Hementioning

confidence: 99%

Section: Distorted Spin-dependent Spectral Function For Hementioning

confidence: 99%

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Transverse momentum distributions and nuclear effects

Pace

Dotto

Kaptari

et al. 2015

EPJ Web of Conferences

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“…In recent years, electron scattering experiments have been possible with kinematics that involve large energies and momentum transfered, as for example in studies of nuclear transparency. In this regime, the final state interactions (FSI) for the knock out of a nucleon are usually treated employing Glauber inspired calculations [1,2,3,4]. Such techniques, together with the experience gained in related nuclear structure studies, provide a useful starting point to pursue accurate predictions of neutrino-nucleus interactions at high energy.…”

mentioning

confidence: 99%

Final state interactions in electron scattering at high missing energies and momenta

Barbieri

2006

Nuclear Physics B - Proceedings Supplements

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Calculations of two-step rescattering and pion emission for the 12 C(e, e ′ p) reaction at very large missing energies and momenta are compared with recent data from TJNAF. For parallel kinematics, final state interactions are strongly reduced by kinematical constraints. A good agreement between calculation and experiment is found for this kinematics when one admits the presence of high momentum components in the nuclear wave function. In recent years, electron scattering experiments have been possible with kinematics that involve large energies and momentum transfered, as for example in studies of nuclear transparency. In this regime, the final state interactions (FSI) for the knock out of a nucleon are usually treated employing Glauber inspired calculations [1,2,3,4]. Such techniques, together with the experience gained in related nuclear structure studies, provide a useful starting point to pursue accurate predictions of neutrino-nucleus interactions at high energy. This was pointed out by various contributions to this conference.At scattering energies of the order of GeV, the leptoninc probe can resolve the high-momentum tail of the spectral function generated by shortrange (central and tensor) correlations (SRC). This represent about 10-20% of the total spectral strength [5,6] and is found along a ridge in the momentum-energy plane (k-E) which spans a region of several hundred MeV/c (MeV) [7,9,8]. This corresponds to large missing momenta (p m ) and energies (E m ) in knock out cross sections. This contribution to the spectral function is also responsible for most of the binding energy of nuclear systems [10]. The main characteristics pre- * Email: C.Barbieri@gsi.de † Present address: Gesellschaft für Schwerionenforshung, Planckstr. 1, 64291, Darmstadt, Germany dicted by these calculations are confirmed by recent experimental data [11,12,13], which will be considered further below. Locating this strength experimentally, at both large E m and p m , is difficult because it is spread over an energy range of several hundred MeV, so the total density of the spectral function is very low. In this energy regime multi-nucleon processes, beyond the direct knock out, are possible [14] and can induce large shifts in the missing energies and momenta, moving strength to regions where the direct signal is much smaller and therefore submerging it. As it will be discussed below, the effects of FSI become larger and less controllable when the transverse structure functions that enter the expression of the (e, e ′ p) cross section dominate the longitudinal one. This trend is predicted by several theoretical studies [14,15,16,17,18]. The issue of how to control FSI in lepton scattering experiments has been discussed in detail in Ref. [19,20] for the particular case of kinematics sensitive to the SRC tail of the nuclear spectral function. A Monte Carlo simulation and kinematical arguments led to the suggestion that the best chance for an identification of SRC occurs in parallel kinematics 3 .3 In this work we refer to 'paralle...

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Lepton scattering off few-nucleon systems at medium and high energies

Atti

Kaptari²,

Morita

2008

Few-Body Syst

Self Cite

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The interpretation of recent Jlab experimental data on the exclusive process A(e,e'p)B off few-nucleon systems are analyzed in terms of realistic nuclear wave functions and Glauber multiple scattering theory, both in its original form and within a generalized eikonal approximation. The relevance of the exclusive process 4 He(e, e ′ p) 3 H for possible investigations of QCD effects is illustrated.Exclusive and semi-inclusive lepton scattering off nuclei in the quasi elastic region, plays a relevant role in nowadays hadronic physics for the following main reasons: i) due to the wide kinematical range available by present experimental facilities, non trivial information on nuclei (e.g. nucleon-nucleon (NN) correlations) can be obtained; ii) the mechanism of propagation of hadronic states in the medium can be investigated in great details; iii) at high energies QCD related effects (e.g. color transparency effects) might be investigated. At medium and high energies the propagation of a struck hadron in the medium is usually treated within the Glauber multiple scattering approach (GA) [1], which has been applied with great success to hadron scattering off nuclear targets. However, when the hadron is created inside the nucleus, as in a process A(l , l ′ p)X, various improvements of the original GA have been advocated. Most of them are based upon a Feynman diagram reformulation of GA; such an approach, developed long ago for the treatment of hadron-nucleus scattering [2], has been recently generalized to the process A(l, l ′ p)X [3], demonstrating that in particular kinematical regions appreciable deviations from GA are expected. The merit of the approach, based upon a generalized eikonal approximation (GEA), is that the frozen approximation, common to GA, is partly removed by taking into account the excitation energy of the A − 1 system; this results in a correction term to the standard profile function of GA, leading to an additional contribution to the *

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Relativistic structure of the deuteron: Electrodisintegration andyscaling

Cited by 70 publications

References 39 publications

Transverse momentum distributions and nuclear effects

Transverse momentum distributions and nuclear effects

Final state interactions in electron scattering at high missing energies and momenta

Lepton scattering off few-nucleon systems at medium and high energies

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