Measurement of the cross section of the reaction pn → ppπ− in the energy region of dibaryon resonances (500–1000 MeV)

Dakhno, L.G.; Кравцов, А.В.; Lobachev, E.A.; Makarov, M.M.; Medvedev, V.I.; Obrant, G.; Poromov, V.I.; Sarantsev, V.V.; Sirin, V.M.; Sokolov, G.L.; Sherman, S.G.

doi:10.1016/0370-2693(82)90081-8

Cited by 31 publications

(31 citation statements)

References 11 publications

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“…7 by the dashed line, which is arbitrarily adjusted in height to the data. The data [32,45] presented in Fig. 7 follow this expectation by exhibiting an increasing cross section with increasing energy up to about √ s ≈ 2.30 GeV.…”

Section: The Dibaryon-induced Model For the S-wave N N Interactionsupporting

confidence: 57%

“…Fig.7(Color online) The N N -induced isoscalar single-pion production cross section in dependence of the total c.m. energy √ s. Shown are the recent results from WASA-at-COSY[32] (solid circles) together with earlier results[45] at lower energies. The dashed line shows the expected energy dependence based on t-channel Roper excitation[32,46], the solid line a Lorentzian fit to the data with m = 2315 MeV and Γ = 150 MeV.…”

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confidence: 86%

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Nature of $\bm{S}$-wave $\bm{NN}$ interaction and dibaryon production at nucleonic resonance thresholds

Kukulin,

Rubtsova,

Platonova

et al. 2020

Preprint

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Phase shifts and inelasticity parameters for N N scattering in the partial-wave channels 3 S 1 -3 D 1 and 1 S 0 at energies T lab from zero to about 1 GeV are described within a unified N N potential model assuming the formation of isoscalar and isovector dibaryon resonances near the N N * (1440) threshold. Evidence for these near-threshold resonances is actually found in the recent WASA experiments on single-and double-pion production in N N collisions. There, the excitation of the Roper resonance N * (1440) exhibits a structure in the energy dependence of the total cross section, which corresponds to the formation of dibaryon states with I(J π ) = 0(1 + ) and 1(0 + ) at the N N * (1440) threshold. These two S-wave dibaryon resonances may provide a new insight into the nature of the strong N N interaction at low and intermediate energies.

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Section: The Dibaryon-induced Model For the S-wave N N Interactionsupporting

confidence: 57%

mentioning

confidence: 86%

Nature of $\bm{S}$-wave $\bm{NN}$ interaction and dibaryon production at nucleonic resonance thresholds

Kukulin,

Rubtsova,

Platonova

et al. 2020

Preprint

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“…The main reason for this situation is due to the difficulty to create a pure monoenergetic neutron beam. Therefore most previous experiments used either a continuous neutron beam in a fairly wide energy range [1] or investigated the pn-interaction with a proton beam and a deuteron target as a neutron source [2,3,4]. Of course, it is worth to mention the works where the energies of neutrons were defined using the timeof-flight technique [5,6].…”

Section: Introductionmentioning

confidence: 99%

The study of the negative pion production in neutron-proton collisions at beam momenta below 1.8 GeV/c

et al. 2009

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A detailed investigation of the reaction np → ppπ − has been carried out using the data obtained with the continuous neutron beam produced by charge exchange scattering of protons off a deuterium target. A partial wave event-by-event based maximum likelihood analysis was applied to determine contributions of different partial waves to the pion production process. The combined analysis of the np → ppπ − and pp → ppπ 0 data measured in the same energy region allows us to determine the contribution of isoscalar partial waves (I=0) in the momentum range from 1.1 up to 1.8 GeV/c. The decay of isoscalar partial waves into ( 1 S0)ppπ channel provides a good tool for a determination of the pp S-wave scalar scattering length in the final state which was found to be app = −7.5 ± 0.3 fm.PACS. 13.75.Cs Nucleon-nucleon interactions -13.85.Lg Total cross sections -25.40.Fq Inelastic neutron scattering

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“…However, the situation for σ 01 was not clear in the past. Several experiments reported significant σ 01 values below 600 MeV [28,29,30,31,32], while others found small or even negligible σ 01 contributions for energies up to 750 MeV [33,34,35]. A partial wave analysis of Arndt and Verwest [36] gave no significant σ 01 contribution below 1 GeV while Bystricky et al [37] found small, but non-negligible values in a similar analysis.…”

Section: Determination Of σ 01mentioning

confidence: 95%

“…In addition, due to the different particle masses in the final states of the reactions np → ppπ − and np → nnπ + , the cross section data can not be compared at the same beam energies. The T n values of Kleinschmidt [70,28,30,38,31,33,71,34,35]. Full line: prediction of the Jülich model [10,72].…”

Section: Integrated Cross Sectionsmentioning

confidence: 99%

The reaction np→ppπ- from threshold up to 570 MeV

et al. 2007

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Abstract. Due to a coding error, the previous paper quoted incorrect values for the differential cross sections dσ/ dMpp and dσ/ dΩ * π of the process np → ppπ − . Due to a coding error, the previous paper [1] quoted incorrect values for the differential cross sections of the process np → ppπ − . The differential cross sections dσ/ dM pp as shown in Fig. 9 of [1] are too small by a factor of two. In Table 3 The online version of the original article can be found at http://dx

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Measurement of the cross section of the reaction pn → ppπ− in the energy region of dibaryon resonances (500–1000 MeV)

Cited by 31 publications

References 11 publications

Nature of $\bm{S}$-wave $\bm{NN}$ interaction and dibaryon production at nucleonic resonance thresholds

Nature of $\bm{S}$-wave $\bm{NN}$ interaction and dibaryon production at nucleonic resonance thresholds

The study of the negative pion production in neutron-proton collisions at beam momenta below 1.8 GeV/c

The reaction np→ppπ- from threshold up to 570 MeV

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