Measurement of differential cross sections of π+p and π−p elastic scattering in the region of low-lying pion nucleon resonances

Gordeev, V. A.; Koptev, V.; Kruglov, S. P.; Kuzmin, L. A.; Kulbardis, A. A.; Malov, Yu.A.; Mikirtichyants, S.; Strakovsky, I. I.; Scherbakov, G. V.

doi:10.1016/0375-9474(81)90579-0

Cited by 17 publications

(4 citation statements)

References 21 publications

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“…This corresponds to the prediction of the differential cross section dσ/dΩ π as a function of the scattering pion angles θ, for fixed energies of incident pions. In Figure 4, we have compared our predictions for the differential cross section with some available experimental data [29,30,31] for T lab ≈ 263 and 291 MeV, in a wide interval of scattering angles.…”

Section: Elastic π + P Scattering: Fixing the Mass And Width Of The ∆mentioning

confidence: 99%

Elastic and radiative π+p scattering and properties of the Δ++ resonance

Castro

Mariano

2002

Nuclear Physics A

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We study the ∆ ++ contributions to elastic and radiative π + p scattering within an effective Lagrangian model which incorporates the ∆, N, ρ and σ meson degrees of freedom. This model provides a description of the ∆ resonance and its interactions that respects electromagnetic gauge invariance and invariance under contact transformations when finite width effects are incorporated. Following recent developments in the description of unstable gauge bosons, we use a complex mass scheme to introduce the finite width of the ∆ ++ without spoiling gauge invariance. The total cross section of elastic π + p scattering, whose amplitude exhibits the resonant plus background structure of S-matrix theory, is used to fix the mass, width and strong coupling of the ∆ resonance. The differential cross section of elastic scattering is found in very good agreement with experimental data. The magnetic dipole moment of the ∆ ++ , µ ∆ , is left as the only adjustable parameter in radiative π + p scattering.From a fit to the most sensitive configurations for photon emission in this process, we obtain µ ∆ = (6.14 ± 0.51)e/2m p , in agreement with predictions based on the SU(6) quark model. 1

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Section: Elastic π + P Scattering: Fixing the Mass And Width Of The ∆mentioning

confidence: 99%

Elastic and radiative π+p scattering and properties of the Δ++ resonance

Castro

Mariano

2002

Nuclear Physics A

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“…The experiment was performed on a pion channel [7] of the LNPI synchrocyclotron using a polarized proton target [-8] and wire spark chambers with magnetostrictive read-out [9]. The experimental layout is shown in Fig.…”

Section: Introduction 2 Experimentalmentioning

confidence: 99%

Measurement of the polarization parameterP in? + p elastic scattering in the region of low-lying pion-nucleon resonances

et al. 1983

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This paper presents the results of an experiment in which the polarization parameter P in ~+p elastic scattering has been measured in the energy range from 335 to 580 MeV. The experiment was performed on a pion channel of the LNPI synchrocyclotron using a polarized proton target and wire spark chambers with magnetostrictive read-out The results have substantially higher precision in comparison with the most of other experiments in this energy range and allow to determine unambiguously the shape of angular dependence P(O*) in the whole investigated region. New phase-shift analysis of ~+p scattering data has been performed. The results of this experiment were used also to check isospin invariance.

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“…Effects of the main contributors on the differential cross sections (left side) and polarizations (right side) of the reaction π − p → π − p. The experimental data are taken from[64][65][66][67][68]76]. The bold solid curves correspond to the full model result.…”

mentioning

confidence: 99%

“…FIG.5: Effects of the main contributors on the differential cross sections of the reaction π + p → π + p at two energy points P π =240, 427 MeV/c. The experimental data are taken from[64][65][66]. The bold solid curves correspond to the full model result.…”

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Quark model study of the πN→πN reactions up to the N(1440) resonance region

2017

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A combined analysis of the reactions π + p → π + p, π − p → π − p and π − p → π 0 n is carried out with a chiral quark model. The observations are reasonably described from the ∆(1232) resonance region up to the N(1440) resonance region. Besides the ∆(1232)P 33 , a confirmed role of N(1440)P 11 is found in the polarizations of the π − p → π − p and π − p → π 0 n reactions. It is found that the N(1440)Nπ and ∆(1232)Nπ couplings are about 1.7 and 4.8 times larger than the expectations from the simple quark model, respectively, which may suggest the unusual property of N(1440)P 11 and deficiency of the simple quark model in the description of N(1440)P 11 and ∆(1232)P 33 . The t-and u-channel backgrounds have notable contributions to the π + p → π + p reaction, while in the π − p → π − p, π 0 n reactions, the s-channel nucleon and t-and u-channel backgrounds play crucial roles.

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Measurement of differential cross sections of π+p and π−p elastic scattering in the region of low-lying pion nucleon resonances

Cited by 17 publications

References 21 publications

Elastic and radiative π+p scattering and properties of the Δ++ resonance

Elastic and radiative π+p scattering and properties of the Δ++ resonance

Measurement of the polarization parameterP in? + p elastic scattering in the region of low-lying pion-nucleon resonances

Quark model study of the πN→πN reactions up to the N(1440) resonance region

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