Isoscalar off-shell effects in threshold pion production from<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>pd</mml:mi></mml:math>collisions

Canton, L.; Schadow, W.

doi:10.1103/physrevc.61.064009

Cited by 6 publications

(5 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With the same parameterization suggested by Hamilton we found in Ref. [1] that the pionproduction cross section at threshold can be reproduced, while without these off-shell effects the results are underestimated by one order of magnitude.…”

Section: Theoretical Modelsupporting

confidence: 70%

“…With the same model of Ref. [1], we have calculated the spin observables at threshold. The formalism for the spin observables for this reaction has been given in Ref.…”

Section: Resultsmentioning

confidence: 99%

“…In a recent paper [1], the π-production reaction from pd collisions has been calculated in the threshold region. The model includes meson-exchange rescattering diagrams in s waves, with πN contributions in the isovector and the isoscalar channels.…”

Section: Theoretical Modelmentioning

confidence: 99%

See 2 more Smart Citations

Spin observables for pion production from pd collisions

Canton

Pisent

Schadow³

et al. 2001

Nuclear Physics A

Self Cite

View full text Add to dashboard Cite

We have calculated the proton analyzing power A_{y0} of the pion-production reaction from pd collisions for one energy close to threshold and for another in the region of the $\Delta$-resonance. A fair reproduction of the experimental data could be obtained in both cases with a model which includes isoscalar and isovector $\pi N$ rescatterings in s waves, as well as the p-wave rescattering mechanisms mediated by the $\pi NN$ and $\pi N \Delta$ vertices. For the analyzing power at threshold we found that the initial-state interaction (ISI) is also quite important.Comment: Talk at XVIth International Conference on Few-Body Problems in Physics, Taipei, Taiwan, March 6-10 2000. 3 pages, latex, 2 figures -- To appear in Nuclear Physics A -- fleqn.sty and espcrc1.sty require

show abstract

Section: Theoretical Modelsupporting

confidence: 70%

“…With the same model of Ref. [1], we have calculated the spin observables at threshold. The formalism for the spin observables for this reaction has been given in Ref.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Spin observables for pion production from pd collisions

Canton

Pisent

Schadow³

et al. 2001

Nuclear Physics A

Self Cite

View full text Add to dashboard Cite

show abstract

“…New experiments are also performed or in progress on meson production in few-nucleon systems as in pd → 3 He π 0 or pd → 3 H π + [7] as well as corresponding η meson production experiments [8]. However, theoretical efforts in this direction with three-nucleon dynamics are very scarce [9,10] and the situation is much less satisfactory as compared with the two-nucleon case. Nevertheless, pionic inelasticities in 3-or 4-nucleon systems should be the necessary bridge towards understanding them in nuclei and potentially using them as a probe in many-body nuclear physics and for possible effects of nuclear medium on hadrons and their interactions.…”

Section: Introductionmentioning

confidence: 99%

Positive pion absorption on3Heusing modern trinucleon wave functions

et al. 2003

View full text Add to dashboard Cite

We study pion absorption on 3 He employing trinucleon wave functions calculated from modern realistic N N interactions (Paris, CD Bonn). Even though the use of the new wave functions leads to a significant improvement over older calculations with regard to both cross section and polarization data, there are hints that polarization data with quasifree kinematics cannot be described by just two-nucleon absorption mechanisms.

show abstract

“…A coupled-channel calculation with the explicit treatment of the ∆-isobar excitation which leads to effective 3N F 's in the three-nucleon subsystem reduces the Sagara discrepancy by a considerably large fraction [6]. Useful insights about the importance of possible 3N F -diagrams should also be obtained from the study of pion production/absorption mechanisms in the 3N system, since progress has been recently made in the theoretical treatment of these reactions at the ∆ resonance [7,8] and in the threshold region [9].…”

Section: Introductionmentioning

confidence: 99%

Why is the three-nucleon force so odd?

Canton

Schadow

2000

Phys. Rev. C

Self Cite

View full text Add to dashboard Cite

By considering a class of diagrams which has been overlooked also in the most recent literature on three-body forces, we extract a new contribution to the three-nucleon interaction which specifically acts on the triplet odd states of the two nucleon subsystem. In the static approximation, this 3N-force contribution is fixed by the underlying 2N interaction, so in principle there are no free parameters to adjust. The 2N amplitude however enters in the 3NF diagram in a form which cannot be directly accessed or constrained by NN phase-shift analysis. We conclude that this new 3N-force contribution provides a mechanism which implies that the presence of the third nucleon modifies the p-wave (and possibly the f-wave) components of the 2N subsystem in the triplet-isotriplet channels.Comment: 10 Pages, 7 figures, RevTeX, twocolumn, epsf (updated version with minor changes

show abstract

Isoscalar off-shell effects in threshold pion production frompdcollisions

Cited by 6 publications

References 35 publications

Spin observables for pion production from pd collisions

Spin observables for pion production from pd collisions

Positive pion absorption on3Heusing modern trinucleon wave functions

Why is the three-nucleon force so odd?

Contact Info

Product

Resources

About