Positive-pion absorption on carbon at low pion energies

Akimov, Yu.K.; Gornov, M.G.; Gostkin, M. I.; Gurov, Yu. B.; Haysak, Ivan; Kruglov, S. P.; Merzlyakov, S.I.; Oganesyan, K. B.; Pasyuk, E.; Porokhovoy, S.; Руденко, А. И.; Shishkov, A. V.; Strakovsky, I. I.

doi:10.1016/0375-9474(92)90185-m

Cited by 3 publications

(3 citation statements)

References 9 publications

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“…More recent measurements of the partial total cross section for the inverse reaction at SATURNE have verified this effect [3]. In a recent experiment of the Dubna-Gatchina group on pion absorption on carbon [4] a dip in the energy dependence of the quasi-deuteron component of absorption near T π =28 MeV has been observed. The measurements of pion absorption on the deuteron [5] performed by the same group also indicated possible structure at a pion energy of 30 MeV.…”

Section: Introductionmentioning

confidence: 88%

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π++d→p+preaction between 18 and 44 MeV

et al. 1997

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A study of the reaction ϩ ϩd→ pϩp has been performed in the energy range of 18-44 MeV. Total cross sections and differential cross sections at six angles have been measured at 15 energies with an energy increment of 1-2 MeV. This is the most systematic data set in this energy range. No structure in the energy dependence of the cross section has been observed within the accuracy of this experiment.

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Section: Introductionmentioning

confidence: 88%

“…Some possible alternative explanations of the structure in this energy range are given in Ref. [2,4]. One of them attributed the structure to the excitation of a diproton resonance in the 3 P 2 NN state.…”

Section: Introductionmentioning

confidence: 99%

π++d→p+preaction between 18 and 44 MeV

et al. 1997

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“…Thus, according to (5)(6)(7)(8)(9)(10)(11)(12), the n and y spectra are determined mainly by the boundary ball decay energy Ed and Fourier term \ y A ( q ) of the A-isobar wave function. These values can be obtained by analysis of the experimental data, using for the description Y,(q) the s-state harmonic oscillator wave function yA(q) = (npA h ~) -~" exp ( -q2/pAhw).…”

Section: Physica Scripta 48 \ Imentioning

confidence: 99%

Pion production near absolute threshold, narrow resonances in (p, π) reaction and localized Δ-isobar states in nuclei

Zubkov

1993

Phys. Scr.

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The experimental data analysis we have carried out shows that there are at the least two additional experimental dataOf which the hypothesis Of the A-isobar localized state (A-ball) formation can be used. Possible mechanism of A-isobar localized state formation in nuclear reaction is considered. A set of main A-isobar localized state characteristics is obtained and the model of II, y-production in pnucleus and nucleus-for the nucleus collisions through A-localized state formation is suggested. The First, it is the experimental observation of the abnormal results of the calculations show that the theory successfully explains the characteristics of narrow resonance (EP = 350MeV, r 10 MeV), observed recently in proton-nucleus collisions as well as the effect of stability of the pion spectra slope parameter near the absolute threshold. The experiments for checking the outlined theoretical approach are suggested.

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