Positive pion-nucleus elastic scattering at 40 MeV

Blecher, M.; Gotow, K.; Jenkins, David; Milder, F. L.; Bertrand, F.; Cleary, T.P.; Gross, E.E.; Ludemann, C.A.; Moinester, M. A.; Burman, R. L.; Hamm, Marianne E.; Redwine, R.; Yates-Williams, M. A.; Dam, S. H.; Darden, C. W.; Edge, R. D.; Malbrough, D. J.; Marks, Thomas A.; Preedom, B. M.

doi:10.1103/physrevc.20.1884

Cited by 49 publications

(17 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1. The experimental data (black error bars) are taken from the SAID/GWU data base [45,46] with normalizations ζ k from Table 3 extracted from the data fit; the two panels include the data from [61,62] (top) and [66,70,72,73] (bottom). Green crosses refer to the RS representation in (11) with the scattering lengths from the fit solution in Table 2.…”

Section: Consequences For the Pion-nucleon σ-Termmentioning

confidence: 99%

Extracting the σ-term from low-energy pion-nucleon scattering

Elvira

Hoferichter

Kubis³

et al. 2017

J. Phys. G: Nucl. Part. Phys.

View full text Add to dashboard Cite

Abstract. We present an extraction of the pion-nucleon (πN ) scattering lengths from low-energy πN scattering, by fitting a representation based on RoySteiner equations to the low-energy data base. We show that the resulting values confirm the scattering-length determination from pionic atoms, and discuss the stability of the fit results regarding electromagnetic corrections and experimental normalization uncertainties in detail. Our results provide further evidence for a large πN σ-term, σ πN = 58(5) MeV, in agreement with, albeit less precise than, the determination from pionic atoms.

show abstract

Section: Consequences For the Pion-nucleon σ-Termmentioning

confidence: 99%

Extracting the σ-term from low-energy pion-nucleon scattering

Elvira

Hoferichter

Kubis³

et al. 2017

J. Phys. G: Nucl. Part. Phys.

View full text Add to dashboard Cite

show abstract

“…5-9 are displayed some of the calculated partial waves fL(q; r) of the distorted X(~-)(q; r)* to see how )~-~* depends on the pion optical potential em- [13,14] and [15] .,a ,~"-~'~- The neutral pion (n ~ partial waves at T~ =-30 MeV for the same nuclei are shown in Figs. 8 and 9.…”

Section: Pi-mesonic Decay Rates Under the Closure Approximationmentioning

confidence: 99%

pi-Mesonic decay of hypernuclei and pion wavefunction

Itonaga

Motoba

Bandō

1988

Z. Physik A - Atomic Nuclei

View full text Add to dashboard Cite

The pi-mesonic decay of hypernuclei is studied by using the pion distorted waves which are the solutions of the Klein-Gordon equation with the optical potential. The distortions of the pion waves give rise to significant enhancement of the n-decay rate compared with the pion free-wave case. The n-decay rates are very sensitive to the behavior of the pion wave deep inside the nucleus and therefore to the chosen pion optical potentials. There is a tendency that the enhancement is larger for the n--decay than for the n~ due to the combined effects of the Coulomb and optical potentials.

show abstract

“…The potential parameters, phenomenological and scaled, are noted in Tables I, II, and III for T π = 20, 30, 40 MeV, respectively. The calculated differential cross sections, using these potentials, are reasonably compared with measured ones [16][17][18][19][20][21] in Figs. 4, 5, and 6 for T π = 20, 30, 40 MeV, respectively.…”

Section: Resultsmentioning

confidence: 78%

Analyses of \pi^{\pm} nucleus elastic scattering data at T_\pi = 40, 30, 20 MeV using a suggested scaling method

Shehadeh

El-Shawaf

2018

Rev. Mex. Fís.

View full text Add to dashboard Cite

The data for elastically scattered charged pions from few nuclei, namely 12 C, 16 O, 28 Si, 32 S, 40 Ca, 56 Fe, 58 Ni, and 90 Zr have been analyzed by obtained potentials using a suggested scaling procedure. Originally the π ± -12 C elastic scattering data at 50 MeV was nicely fitted by a parameterized simple local optical potential extracted from available phase shifts using inverse scattering theory. The potential parameters of the π ± -12 C systems were scaled to π ± -16 O systems and then successively to other few systems covering the scattering of charged pions from target nuclei, namely π ± -28 Si, π ± -32 S, π ± -40 Ca, π ± -56 Fe, π ± -58 Ni and π ± -90 Zr. The obtained scaled potentials showed a remarkable success in explaining the available measured elastic differential cross sections, and in predicting other ones for the systems under consideration. The reaction cross sections have been calculated for all these systems at the three incident pion's kinetic energies, T π = 40, 30, 20 MeV. Unfortunately, experimental reaction cross sections are totally absent or cloudy and unconfident. As such, and at this stage, we consider our calculated values useful and pending for future investigations. For the systems and energies considered herein, simple scaling relations are well established. This will be beneficial in analyzing similar nuclear scattering data, as low-energy pion-nucleus and kaon-nucleus elastic scattering data; and, hopefully, in explaining pionic atom data.

show abstract

Positive pion-nucleus elastic scattering at 40 MeV

Cited by 49 publications

References 21 publications

Extracting the σ-term from low-energy pion-nucleon scattering

Extracting the σ-term from low-energy pion-nucleon scattering

pi-Mesonic decay of hypernuclei and pion wavefunction

Analyses of \pi^{\pm} nucleus elastic scattering data at T_\pi = 40, 30, 20 MeV using a suggested scaling method

Contact Info

Product

Resources

About