A Comprehensive Measurement of Analyzing Powers in the Proton-Deuteron Break-Up Channel at 135 MeV

Tavakoli-Zaniani, H.; Bayat, M. T.; Eslami‐Kalantari, M.; Kalantar‐Nayestanaki, N.; Kistryn, S.; Kozela, A.; Messchendorp, J. G.; Mohammadi-Dadkan, M.; Ramazani-Sharifabadi, R.; Stephan, E.

doi:10.1007/978-3-030-32357-8_65

Cited by 3 publications

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“…The results of the analyzing powers for different combinations of (θ 1 = θ 2 , φ 12 ) for small φ 12 which corresponds to d( p, 2 He)n for 135 MeV proton beam energy were also compared to the results using a proton beam with an energy of 190 MeV [47] to study the spin-isospin sensitivity of the 3NF models [29,48,49].…”

Section: Discussionmentioning

confidence: 99%

A comprehensive analysis of differential cross sections and analyzing powers in the proton–deuteron break-up channel at 135 MeV

et al. 2021

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A selection of measured cross sections and vector analyzing powers, $$A_{x}$$ A x and $$A_{y}$$ A y , are presented for the $$\vec {p}{d}$$ p → d break-up reaction. The data are taken with a polarized proton beam with a kinetic energy of 135 MeV using the Big Instrument for Nuclear-polarization Analysis (BINA) at KVI, the Netherlands. With this setup, $$A_{x}$$ A x is extracted for the first time for a large range of energies as well as polar and azimuthal angles of the two outgoing protons. For most of the configurations, the results at small and large relative azimuthal angles differ in behavior when comparing experimental data with the theoretical calculations. We also performed a more global comparison of our data with theoretical calculations. The cross-section results show huge values of $$\chi ^{2}$$ χ 2 /d.o.f.. The absolute values of $$\chi ^{2}$$ χ 2 /d.o.f. for the components of vector analyzing powers, $$A_{x}$$ A x and $$A_{y}$$ A y , are smaller than the ones for the cross section, partly due to larger uncertainties for these observables. However, also for these observables no satisfactory agreement is found for all angular combinations. This implies that the present models of a three-nucleon force are not able to provide a satisfactory description of experimental data.

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Section: Discussionmentioning

confidence: 99%

A comprehensive analysis of differential cross sections and analyzing powers in the proton–deuteron break-up channel at 135 MeV

et al. 2021

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“…A thorough description of the data analysis of the forward-forward configurations can be found in Refs. [33][34][35].…”

Section: Discussionmentioning

confidence: 99%

A comprehensive study of analyzing powers in the proton–deuteron break-up channel at 135 MeV

et al. 2020

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A measurement of the analyzing powers for the $$^2\hbox {H}(\vec {p},pp)n$$ 2 H ( p → , p p ) n break-up reaction was carried out at KVI exploiting a polarized-proton beam at an energy of $$135\,\hbox {MeV}$$ 135 MeV . The scattering angles and energies of the final-state protons were measured using the Big Instrument for Nuclear-polarization Analysis (BINA) with a nearly $$4\pi $$ 4 π geometrical acceptance. In this work, we analyzed a large number of kinematical geometries including forward–forward configurations in which both the final-state particles scatter to small polar angles and backward–forward configurations in which one of the final-state particles scatters to large polar angles. The results are compared with Faddeev calculations based on modern nucleon–nucleon (NN) and three-nucleon (3N) potentials. Discrepancies between polarization data and theoretical predictions are observed for configurations corresponding to small relative azimuthal angles between the two final-state protons. These configurations show a large sensitivity to 3N force effects.

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“…A thorough description of the data analysis of the forward-forward configurations can be found in Refs. [32,33,34].…”

Section: Discussionmentioning

confidence: 99%

A comprehensive study of analyzing powers in the proton-deuteron break-up channel at 135 MeV

Bayat,

Tavakoli-Zaniani,

Amir-Ahmadi

et al. 2020

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A measurement of the analyzing powers for the 2 H(p, pp)n break-up reaction was carried out at KVI exploiting a polarized-proton beam at an energy of 135 MeV. The scattering angles and energies of the final-state protons were measured using the Big Instrument for Nuclear-polarization Analysis (BINA) with a nearly 4π geometrical acceptance. In this work, we analyzed a large number of kinematical geometries including forward-forward configurations in which both the final-state particles scatter to small polar angles and backward-forward configurations in which one of the final-state particles scatters to large polar angles. The results are compared with Faddeev calculations based on modern nucleon-nucleon (NN) and threenucleon (3N) potentials. Discrepancies between polarization data and theoretical predictions are observed for configurations corresponding to small relative azimuthal angles between the two final-state protons. These configurations show a large sensitivity to 3N force effects.

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A Comprehensive Measurement of Analyzing Powers in the Proton-Deuteron Break-Up Channel at 135 MeV

Cited by 3 publications

References 29 publications

A comprehensive analysis of differential cross sections and analyzing powers in the proton–deuteron break-up channel at 135 MeV

A comprehensive analysis of differential cross sections and analyzing powers in the proton–deuteron break-up channel at 135 MeV

A comprehensive study of analyzing powers in the proton–deuteron break-up channel at 135 MeV

A comprehensive study of analyzing powers in the proton-deuteron break-up channel at 135 MeV

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