Quasifree kaon photoproduction from nuclei in a relativistic approach

Abu‐Raddad, Laith J.; Piekarewicz, J.

doi:10.1103/physrevc.61.014604

Cited by 7 publications

(20 citation statements)

References 27 publications

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“…Historically [7], strangeness photoproduction from nuclei is considered as one of the optimal ways to study the formation of hypernuclei [6,[8][9][10]. The hypernuclear production in γA reactions is part of the program at the Jefferson Laboratory [11] as well as the study of the K + -meson production mechanism in photo-nuclear reactions [12].…”

Section: Introductionmentioning

confidence: 99%

Low energy kaon photoproduction from nuclei

2001

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We study $K^+$-meson production in $\gamma{A}$ interaction at energies below the reaction threshold in free space. The Thomas-Fermi and spectral function approaches are used for the calculations of the production process. It is found that the measurement of the differential spectra may allow to reconstruct the production mechanism and to investigate the dispersion relations entering the production vertex. It is shown that the contribution from secondary pion induced reactions to the total kaon photoproduction is negligible for $E_\gamma{<}$1.2 GeV so that strangeness production at low energies is sensitive to the nuclear spectral function.Comment: 20 pages, espcrc1, including 12 figures, to appear in Nucl. Phys.

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Section: Introductionmentioning

confidence: 99%

Low energy kaon photoproduction from nuclei

2001

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“…Indeed, if the longitudinal component of the hadronic tensor is computed in parallel (p ′ =q) kinematics, Eqs. (14) and (15) reduce to the following simple expressions:…”

Section: Resultsmentioning

confidence: 99%

“…In Refs. [14,15] a general formalism has been developed for the study of a variety of quasifree processes in the relativistic plane-wave impulse approximation (RPWIA). This formalism is now applied to the (e, e ′ p) reaction in a mean-field approximation to the Walecka model [33].…”

Section: Formalismmentioning

confidence: 99%

“…First, we employ an established RPWIA formalism, first introduced in Ref. [13] and recently extended to the kaon-photoproduction reaction [14,15], for the study of the (e, e ′ p) reaction in the quasielastic region. Second, we use this formalism to compute the spectral function of 4 He in anticipation of the recently measured, but not yet fully analyzed, A1-collaboration data from Mainz [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

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Extracting the spectral function of4Hefrom a relativistic plane-wave treatment

Abu‐Raddad

Piekarewicz

2001

Phys. Rev. C

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The spectral function of 4 He is extracted from a plane-wave approximation to the (e, e ′ p) reaction using a fully relativistic formalism. We take advantage of both an algebraic "trick" and a general relativistic formalism for quasifree processes developed earlier to arrive at transparent, analytical expressions for all quasifree (e, e ′ p) observables. An observable is identified for the clean and model-independent extraction of the spectral function. Our simple relativistic plane-wave calculations provide baseline predictions for the recently measured, but not yet fully analyzed, momentum distribution of 4 He by the A1-collaboration from Mainz. Yet in spite of its simplicity, our approach predicts momentum distributions for 4 He that rival some of the best nonrelativistic calculations to date. Finally, we highlight some of the challenges and opportunities that remain, both theoretically and experimentally, in the extraction of quasifree observables. PACS number(s): 25.30.Fj,24.10.Jv,21.10.Jx

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“…As such, we develop our model of the nuclear weak transition matrix element for KY-production based on the photo-and electroproduction of mesons in association with baryons from nuclei. 29,30,31,32,33 In doing so, we invoke the impulse approximation whereby one assumes that the incident neutrino interacts with a single bound (off-shell) nucleon inside nuclear medium via the exchange of a single weak gauge boson, and subsequently a pseudoscalar meson is produced in association with hyperon. The rest of the nucleons behave like spectators and make up the residual nucleus.…”

Section: Model For Nuclear Weak Transitionmentioning

confidence: 99%

Associated Hyperon–kaon Production via Neutrino–nucleus Scattering

Adera

Ventel

2011

Int. J. Mod. Phys. E

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We present the investigation of the neutrino-induced strangeness associated production on nuclei in the relativistic plane wave impulse approximation (RPWIA) framework at the intermediate neutrino energies. In this study, the elementary hadronic weak amplitudes are embedded inside the nuclear medium for the description of the exclusive channels of neutrino-nucleus interactions. These amplitudes are extracted using a modeldependent evaluation of the hadronic vertex using the Born term approximation in which the application of the Cabibbo V-A theory and SU(3) symmetry are assumed to be valid. The nuclear effects are included via the bound state wavefunctions of the nucleon obtained from the relativistic mean field (RMF) models. Two kinematics settings are used to examine various distributions of the differential cross section in the rest frame of the target nuclei. The numerical results are obtained for the neutrino-induced chargedcurrent (CC) K + Λ-production on bound neutrons in 1s 1/2 and 1p 3/2 orbitals of 12 C.The angular distributions are forward peaked under both kinematic settings, whereas under the quasifree setting the cross sections tend mimic the missing momentum distribution of the bound nucleon inside the nucleus.

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Quasifree kaon photoproduction from nuclei in a relativistic approach

Cited by 7 publications

References 27 publications

Low energy kaon photoproduction from nuclei

Low energy kaon photoproduction from nuclei

Extracting the spectral function of4Hefrom a relativistic plane-wave treatment

Associated Hyperon–kaon Production via Neutrino–nucleus Scattering

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