Pion-nucleus scattering

Nuseirat, Mutazz; Lodhi, M. A. K.; Gibbs, W. R.

doi:10.1103/physrevc.58.314

Cited by 11 publications

(4 citation statements)

References 29 publications

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“…One of the important ingredients of this interaction is the one pion exchange (OPE). However, from detailed studies of the pion nuclear interaction it is well known that the pion properties in the nuclear medium are sizably renormalized [14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Two pion mediated scalar isoscalarNNinteraction in the nuclear medium

2006

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We study the modification of the nucleon nucleon interaction in a nuclear medium in the scalar isoscalar channel, mediated by the exchange of two correlated (σ channel) or uncorrelated pions. For this purpose we use a standard approach for the renormalization of pions in nuclei. The corrections obtained for the N N interaction in the medium in this channel are of the order of 20% of the free one in average, and the consideration of short range correlations plays an important role in providing these moderate changes. Yet, the corrections are sizable enough to suggest further studies of the stability and properties of nuclear matter.

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Section: Introductionmentioning

confidence: 99%

Two pion mediated scalar isoscalarNNinteraction in the nuclear medium

2006

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“…In this study all the optical model parameters, i.e. the ranges of six partial waves, the absorption and the s and p wave multipliers are taken without modification from the corresponding elastic π-nucleus scattering fit [20]. The readjustment of the true absorption requires a re-calculation of the elastic π-nucleus scattering.…”

Section: Energy Dependencementioning

confidence: 99%

“…We take the optical model parameters from 16 O [20]. As was done in the case of the GS transition on 16 O and 40 Ca we fit the angular distribution in order to determine the single particle wave function.…”

Section: Double Isobaric Analog State Transitionmentioning

confidence: 99%

Double charge exchange and configuration mixing

Gibbs

2003

Phys. Rev. C

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The energy dependence of forward pion double charge exchange reactions on light nuclei is studied for both the Ground State transition and the Double-Isobaric-Analog-State transitions. A common characteristic of these double reactions is a resonance-like peak around 50 MeV pion lab energy. This peak arises naturally in a two-step process in the conventional pion-nucleon system with proper handling of nuclear structure and pion distortion. A comparison among the results of different nuclear structure models demonstrates the effects of configuration mixing. The angular distribution is used to fix the single particle wave function. PACS: 25.80Gn, 24.10Ht,21.60Fw

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“…Approximate values of the parameter can be estimated from fits to heavier nuclei (see Refs. [11,14]).…”

Section: Basic Scattering Modelmentioning

confidence: 99%

Elastic scattering of pions from the three-nucleon system

Collier

Gibbs

1999

Phys. Rev. C

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We examine the scattering of charged pions from the trinucleon system at a pion energy of 180 MeV. The motivation for this study is the structure seen in the experimental angular distribution of back-angle scattering for π + -3 He and π − -3 H but for neither π − -3 He nor π + -3 H. We consider the addition of a double spin flip term to an optical model treatment and find that, though the contribution of this term is non-negligible at large angles for π + -3 He and π − -3 H, it does not reproduce the structure seen in the experiment.

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Pion-nucleus scattering

Cited by 11 publications

References 29 publications

Two pion mediated scalar isoscalarNNinteraction in the nuclear medium

Two pion mediated scalar isoscalarNNinteraction in the nuclear medium

Double charge exchange and configuration mixing

Elastic scattering of pions from the three-nucleon system

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