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

Bayat, M. T.; Tavakoli-Zaniani, H.; Amir-Ahmadi, H. R.; Deltuva, A.; Eslami‐Kalantari, M.; Golak, J.; Kalantar‐Nayestanaki, N.; Kistryn, S.; Kozela, A.; Mardanpour, H.; Messchendorp, J. G.; Mohammadi-Dadkan, M.; Ramazani-Moghaddam-Arani, A.; Ramazani-Sharifabadi, R.; Skibiński, R.; Stephan, E.; Witała, H.

doi:10.1140/epja/s10050-020-00255-0

Cited by 3 publications

(2 citation statements)

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“…To have a more efficient study and to compare globally the theoretical predictions with the complete data set, a global analysis is performed with averages of observables [23,24]. For this purpose, we follow the same procedure as presented in earlier work [45] whereby we analyzed the average difference between data and the available theoretical calculations in units of the experimental uncertainties.…”

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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“…The discrepancy is strongly reduced after including 3NF (Fig. 1 A xx , A xy , A yy 65 [26], 80 [23,37] σ pd 135 [38][39][40], 190 [41,42] σ, A The thesis is organized in the following way: the theoretical background of the three-nucleon system is briefly described in Chapter 2. The experimental program and the detection setup description are contained in Chapter 3.…”

Section: Introductionmentioning

confidence: 99%

Experimental Studies of the Three Nucleon System Dynamics in the Proton Induced Deuteron Breakup at 108 MeV

Łobejko,

Kalantar-Nayestanaki,

Kistryn

et al. 2024

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Analyzing powers at low nucleon–nucleon relative energies in proton–deuteron breakup reaction

et al. 2022

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Vector analyzing powers for the $$d(\vec {p},pp)n$$ d ( p → , p p ) n reaction have been measured at KVI for different kinematical configurations using a polarized proton beam with an energy of 190 MeV. We compared our data with different theoretical calculations at extremely low relative energies of the proton–proton and proton–neutron systems in the final state. For the proton–neutron case, we used the information of the two detected protons in the final state in which one of them scattered to an angle smaller than $$40^{\circ }$$ 40 ∘ and the other one to an angle larger than $$100^{\circ }$$ 100 ∘ in the laboratory frame. We extrapolated our measurements towards a kinematical configuration to a vanishing relative energy. Our results show that none of the theoretical models presented here is able to reproduce experimental data for the proton–proton case at very low relative energies. For the proton–neutron case, we were not able to provide a reliable extrapolation to small relative energies of less than 1 MeV. Present results are the basis for future investigations of spin-isospin dependencies in the nuclear many-body force.

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

Abstract: A measurement of the analyzing powers for the $$^2\hbox {H}(\vec {p},pp)n$$ 2 H ( p → , p p ) n … Show more

Cited by 3 publications

References 46 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

Experimental Studies of the Three Nucleon System Dynamics in the Proton Induced Deuteron Breakup at 108 MeV

Analyzing powers at low nucleon–nucleon relative energies in proton–deuteron breakup reaction

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