Weak production of strange resonances in a relativistic quark model

Finjord, J.; Ravndal, F.

doi:10.1016/0550-3213(76)90379-5

Cited by 7 publications

(20 citation statements)

References 6 publications

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“…(iii) For free nucleon targets, the cross section for production of Λ is always greater than the cross section for production of Σ 0 . The ratio R = σ(ν+p→µ + +Σ 0 ) σ(ν+p→µ + +Λ) reaches an asymptotic value of around 0.3 which is consistent with older results of Cabibbo and Chilton [31] but is considerably different with the prediction of a relativistic quark model due to Finjord and Ravndal [33]. This ratio is considerably smaller at low energies due to threshold effects which suppress Σ 0 production compared to Λ production.…”

Section: Total Cross Sectionssupporting

confidence: 79%

“…There exist very few calculations for the neutrino production of strange baryons and mesons from free nucleons. In these calculations the hyperon nucleon transition form factors are determined either from the Cabibbo theory with SU(3) symmetry [31,32] or from some quark models used for describing the baryon structure [33]. There are no calculations to our knowledge where nuclear effects have been included in the weak production of strange particles from nuclei induced by neutrinos.…”

Section: Introductionmentioning

confidence: 99%

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Weak quasielastic production of hyperons

Singh

Vacas

2006

Phys. Rev. D

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The quasielastic weak production of Λ and Σ hyperons from nucleons and nuclei induced by antineutrinos is studied in the energy region of some ongoing neutrino oscillation experiments in the intermediate energy region. The hyperon nucleon transition form factors determined from neutrino nucleon scattering and an analysis of high precision data on semileptonic decays of neutron and hyperons using SU(3) symmetry have been used. The nuclear effects due to Fermi motion and final state interaction effects due to hyperon nucleon scattering have also been studied. The numerical results for differential and total cross sections have been presented. * Electronic address:

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Section: Total Cross Sectionssupporting

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Weak quasielastic production of hyperons

Singh

Vacas

2006

Phys. Rev. D

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“…σ(ν µ p → µ + Σ 0 ) = 1 2 σ(ν µ n → µ + Σ − ), while no Σ + is produced off the free nucleon target due to ∆S = ∆Q rule. A comparison is made with available experimental results from CERN [59][60][61], BNL [62], FNAL [63,64] and SKAT [65] experiments as well as with the theoretical calculations performed by Wu et al [86] and Finjord and Ravndal [55] using quark model and the calculations performed by Erriquez et al [61], Brunner et al [65] and Kuzmin and Naumov [70] based on the prediction from Cabibbo theory. A reasonable agreement with the experimental results can be seen.…”

Section: Hyperon Productionmentioning

confidence: 99%

“…Experimental results for the process νµp → µ + Λ (triangle right[60], triangle up[59], square[61], triangle down(σ = 2.6 +5.9 −2.1 × 10 −40 cm 2 )[62], circle[65]) and for the process νµp → µ + Σ 0 (diamond[59]) are shown with error bars. Theoretical curves are of Kuzmin and Naumov[70](double dashed-dotted line), Brunner et al[65](dashed line), Erriquez et al[61](dashed-double dotted line) obtained using Cabibbo theory with axial vector dipole mass as 0.999GeV, 1.1 GeV and 1 GeV, respectively, while the results of Wu et al[86](dotted line) and Finjord and Ravndal[55](dashed dotted line) are obtained using quark model.…”

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confidence: 99%

Weak Quasielastic Hyperon Production Leading to Pions in the Antineutrino-Nucleus Reactions

2019

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In this review, we have studied the quasielastic production cross sections and polarization components of Λ, Σ 0 and Σ − hyperons induced by the weak charged currents in the antineutrino reactions on the nucleon and the nuclear targets like 12 C, 16 O, 40 Ar and 208 Pb. It is shown that the energy and the Q 2 dependence of the cross sections and the various polarization components can be effectively used to determine the axial vector transition form factors in the strangeness sector and test the validity of various symmetry properties of the weak hadronic currents like G-invariance, T-invariance and SU(3) symmetry. In particular, the energy and the Q 2 dependence of the polarization components of the hyperons is found to be sensitive enough to determine the presence of the second class current with or without T-invariance.These hyperons decay dominantly into pions giving an additional contribution to the weak pion production induced by the antineutrinos. This contribution is shown to be quantitatively significant as compared to the pion production by the ∆ excitation in the nuclear targets in the sub-GeV energy region relevant for theνµ cross section measurements in the oscillation experiments. We have also included a few new results, based on our earlier works, which are in the kinematic region of the present and future (anti)neutrino experiments being done with the accelerator (anti)neutrinos at T2K, MicroBooNE, MiniBooNE, NOνA, MINERνA and DUNE, as well as for the atmospheric (anti)neutrino experiments in this energy region.

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“…There are some experimental studies performed to determine these form factors from the cross section measurements done for these processes at CERN [4][5][6], BNL [7], FNAL [8,9] and Serpukhov [10] which are limited by low statistics. Theoretically, these reactions have been studied for more than 50 years [11][12][13][14][15][16][17][18][19][20][21] but recently there has been renewed interest in studying these reactions [22][23][24][25][26][27] due to the feasibility of doing experiments with the availability of high intensity antineutrino beams [28][29][30][31][32][33]. Most of the theoretical calculations have been done only for the production cross section but there exist some calculations also for the polarization of the produced hyperons [13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Quasielastic production of polarized hyperons in antineutrino-nucleon reactions

et al. 2016

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We have studied the differential cross section as well as the longitudinal and perpendicular components of polarization of final hyperon(Λ,Σ) produced in the antineutrino induced quasielastic charged current reactions on nucleon and nuclear targets. The nucleon-hyperon transition form factors are determined from the experimental data on quasielastic (∆S = 0) charged current (anti)neutrinonucleon scattering and the semileptonic decay of neutron and hyperons assuming G-invariance, T-invariance and SU(3) symmetry. The vector transition form factors are obtained in terms of nucleon electromagnetic form factors for which various parameterizations available in literature have been used. A dipole parameterization for the axial vector form factor and the pseudoscalar transition form factor derived in terms of axial vector form factor assuming PCAC and GT relation extended to strangeness sector have been used in numerical evaluations. The flux averaged cross section and polarization observables corresponding to CERN Gargamelle experiment have been calculated for quasielastic hyperon production and found to be in reasonable agreement with the experimental observations. The numerical results for the flux averaged differential cross section dσ dQ 2 and longitudinal(perpendicular) polarization PL(Q 2 )(PP (Q 2 )) relevant for the antineutrino fluxes of MINERνA, MicroBooNE, and T2K experiments have been presented. This will be useful in interpreting future experimental results on production cross sections and polarization observables from the experiments on the quasielastic production of hyperons induced by antineutrinos and explore the possibility of determining the axial vector and pseudoscalar form factors in the strangeness sector.

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Weak production of strange resonances in a relativistic quark model

Cited by 7 publications

References 6 publications

Weak quasielastic production of hyperons

Weak quasielastic production of hyperons

Weak Quasielastic Hyperon Production Leading to Pions in the Antineutrino-Nucleus Reactions

Quasielastic production of polarized hyperons in antineutrino-nucleon reactions

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