Proton-proton interaction at 560 MeV

Baldoni, B.; Focardi, Sergio M.; Hromadnik, H.; Monari, L.; Saporetti, F.; Pbminò, S.; Mbzzanares, F.; Bertolini, Erica; Glalanella, G.

doi:10.1007/bf02780368

Cited by 39 publications

(4 citation statements)

References 7 publications

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“…( 1) are shown in Fig. 2 together with results from earlier measurements [5,6,7,8,9,10,20,21,22,23,24,25,26,27,28,29,30,31]. Our data for the ppπ 0 channel exhibit a flat energy dependence in good agreement with previous data.…”

Section: Resultssupporting

confidence: 88%

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Isoscalar Single-Pion Production in the Region of Roper and $d^*(2380)$ Resonances

Adlarson,

Augustyniak,

Bardan

et al. 2017

Preprint

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Exclusive measurements of the quasi-free pn → ppπ − and pp → ppπ 0 reactions have been performed by means of pd collisions at T p = 1.2 GeV using the WASA detector setup at COSY. Total and differential cross sections have been obtained covering the energy region T p = 0.95 − 1.3 GeV ( √ s = 2.3 -2.46 GeV), which includes the regions of ∆(1232), N * (1440) and d * (2380) resonance excitations. From these measurements the isoscalar single-pion production has been extracted, for which data existed so far only below T p = 1 GeV. We observe a substantial increase of this cross section around 1 GeV, which can be related to the Roper resonance N * (1440), the strength of which shows up isolated from the ∆ resonance in the isoscalar (Nπ) I=0 invariant-mass spectrum. No evidence for a decay of the dibaryon resonance d * (2380) into the isoscalar (NNπ) I=0 channel is found. An upper limit of 180 µb (90 % C.L.) corresponding to a branching ratio of 9 % has been deduced.

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Section: Resultssupporting

confidence: 88%

“…The red horizontal bars represent the same data by use of a pure phase-space correction and serve just as an indication for the stability of the results under extreme assumptions. Other symbols give results from earlier work[5,6,7,8,9,10,20,21,22,23,24,25,26,27,28,29,30,31].…”

mentioning

confidence: 99%

Isoscalar Single-Pion Production in the Region of Roper and $d^*(2380)$ Resonances

Adlarson,

Augustyniak,

Bardan

et al. 2017

Preprint

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show abstract

“…In Eqs. (1)(2)(3)(4)(5)(6)(7), Ψ N represents the Dirac spinor for the nucleon in the spin-isospin space. Ψ µ is the coresponding Rarita-Schwinger spinor for the delta isobar.…”

Section: Model Lagrangianmentioning

confidence: 99%

“…The study of pion production in two nucleon collisions dates back to the mid fifties when one of the earliest measurements of the p(p, nπ + )p reaction was performed [1]. This was followed by several measurements of this reaction in 1960's and early seventies [2]. These experiments were usually conducted in emulsions or bubble chambers, consequently the data invariably had poor statistics.…”

Section: Introductionmentioning

confidence: 99%

Pion production in proton-proton collisions in a covariant one-boson-exchange model

et al. 1996

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Motivated by the renewed interest in studying the pion production on nuclei with protons at few GeV incident energies, we investigate the pion production in proton-proton collisions over an energy range of 300 M eV to 2 GeV . Starting from a realistic one-boson exchange model with parameters fitted to the amplitudes of the elastic nucleon-nucleon scattering, we perform fully covariant calculations for the total, double and triple differential cross-sections of the p(p, nπ + )p and p(p, pπ 0 )p reactions. The calculations incorporate the exchange of π, ρ, ω and σ mesons and treat nucleon and delta isobar as intermediate states. We obtain a reasonably good agreement with the experimental data in the entire range of beam energies. The form of the covariant delta propagator, the cut-off parameter for the πN N and πN ∆ vertex form factors and the energy dependence of the delta isobar decay width is investigated. * Work supported by GSI, Darmstadt, KFA Jülich and JSPS.

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References for 1.1.1.5

Bystrický¹,

Lehar²

Nucleon Nucleon and Kaon Nucleon Scattering

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Proton-proton interaction at 560 MeV

Cited by 39 publications

References 7 publications

Isoscalar Single-Pion Production in the Region of Roper and $d^*(2380)$ Resonances

Isoscalar Single-Pion Production in the Region of Roper and $d^*(2380)$ Resonances

Pion production in proton-proton collisions in a covariant one-boson-exchange model

References for 1.1.1.5

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