<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:mo>−</mml:mo><mml:mi>p</mml:mi></mml:math>Interactions at 2 Bev. I. Single-Pion Production

Fickinger, W.; Pickup, E.; Robinson, D. K.; Salant, E. O.

doi:10.1103/physrev.125.2082

Cited by 105 publications

(39 citation statements)

References 18 publications

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“…For the pion production channels, most of the data points obtained for √ s between 2.0 and 2.4 GeV come from KEK [7] (black dots) and were not included in the Teis fits, which were based on CERN data tables [2]. For the π + production, the KEK points [7] fit rather well with the Teis curve as well as with previous data [4,16], while they are about 15-20% higher for the π 0 production. Our data are compatible with the Teis curve, despite a slight underestimate of the π 0 production at 2.2 GeV.…”

Section: Exclusive One-pion and One-eta Production Cross-sectionssupporting

confidence: 66%

“…At beam energies higher than 1.5 GeV, the interpretation of the low-statistics bubble-chamber data [16][17][18] was based on the isobar model assuming an incoherent sum of contributions from the decays of various baryon resonances into pions. However, large uncertainties remain, due to the limited statistical significance of the corresponding experimental results.…”

Section: Introductionmentioning

confidence: 99%

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Study of exclusive one-pion and one-eta production using hadron and dielectron channels in pp reactions at kinetic beam energies of 1.25 GeV and 2.2 GeV with HADES

Agakishiev¹,

Álvarez‐Pol²,

Bałanda³

et al. 2012

Eur. Phys. J. A

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Abstract. We present measurements of exclusive π +,0 and η production in pp reactions at 1.25 GeV and 2.2 GeV beam kinetic energy in hadron and dielectron channels. In the case of π + and π 0 , high-statistics invariant-mass and angular distributions are obtained within the HADES acceptance as well as acceptancecorrected distributions, which are compared to a resonance model. The sensitivity of the data to the yield Page 2 of 17 Eur. Phys. J. A (2012) 48: 74 and production angular distribution of Δ(1232) and higher-lying baryon resonances is shown, and an improved parameterization is proposed. The extracted cross-sections are of special interest in the case of pp → ppη, since controversial data exist at 2.0 GeV; we find σ = 0.142 ± 0.022 mb. Using the dielectron channels, the π 0 and η Dalitz decay signals are reconstructed with yields fully consistent with the hadronic channels. The electron invariant masses and acceptance-corrected helicity angle distributions are found in good agreement with model predictions.

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Section: Exclusive One-pion and One-eta Production Cross-sectionssupporting

confidence: 66%

Section: Introductionmentioning

confidence: 99%

Study of exclusive one-pion and one-eta production using hadron and dielectron channels in pp reactions at kinetic beam energies of 1.25 GeV and 2.2 GeV with HADES

Agakishiev¹,

Álvarez‐Pol²,

Bałanda³

et al. 2012

Eur. Phys. J. A

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“…These data are shown by the solid squares in Fig. 4 as a function of the excess energy together with the results of the experiment COSY-11 [25,26] very close to threshold, the previous data of COSY-TOF [1,2] and an older data point from BNL [27].…”

Section: Total Cross-sectionsmentioning

confidence: 97%

Influence of N∗-resonances on hyperon production in the channel pp→K+Λp at 2.95, 3.20 and 3.30 GeV/c beam

Abdel‐Samad¹,

Abdel-Bary²,

Brinkmann³

et al. 2010

Physics Letters B

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Hyperon production in the threshold region was studied in the reaction pp → K + Λp using the time-of-flight spectrometer COSY-TOF. Exclusive data, covering the full phase-space, were taken at the three different beam momenta of p beam = 2.95, 3.20 and 3.30 GeV/c, corresponding to excess energies of ε = 204, 285 and 316 MeV, respectively. Total cross-sections were deduced for the three beam momenta to be 23.9 ± 0.8 ± 2.0 µb, 28.4 ± 1.3 ± 2.2 µb and 35.0 ± 1.3 ± 3.0 µb. Differential observables including Dalitz plots were obtained. The analysis of the Dalitz plots reveals a strong influence of the

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“…For the calculation of the imaginary phase shifts, the inelastic cross section is taken to be O"incl = 28.84 mb. 12 …”

Section: Real Parts Of the Phase Shiftsmentioning

confidence: 99%

Proton-Proton Interaction in the GeV Region

Hama

1966

Prog. Theor. Phys.

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261The proton-proton interaction at very small distances is studied by analyzing the elastic scattering data near 2 and 3 GeV. The explicit inclusion of the one-pion-exchange contribution in the high-angular-momentum states and that from the one-boson exchange in the intermediate-angular-momentum states together with the assumption that the absorption coefficients can be represented by a smooth function of the orbital angular momentum l allowed us to determine the phase shifts for lower-angular-momentum states. Three independent solutions have been found at each energy considered, which are smoothly connected with solutions at lower energies. The form of the absorption is such that in general its maximum is in the 1 D 2 state. With respect to the real phase shifts, all of the solutions are consistent with the presence of a strongly repulsive core in the 1S 0 state, and solutions have been found which suggest a repulsive core also in the triplet odd states. The strong spin dependence of the interaction is stressed and this is also discussed in connection with the forward scattering amplitude. Predictions of several triple scattering parameters are given which may eliminate the ambiguity of the solutions found.*> Yukawa Foundation fellow.

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p−pInteractions at 2 Bev. I. Single-Pion Production

Cited by 105 publications

References 18 publications

Study of exclusive one-pion and one-eta production using hadron and dielectron channels in pp reactions at kinetic beam energies of 1.25 GeV and 2.2 GeV with HADES

Study of exclusive one-pion and one-eta production using hadron and dielectron channels in pp reactions at kinetic beam energies of 1.25 GeV and 2.2 GeV with HADES

Influence of N∗-resonances on hyperon production in the channel pp→K+Λp at 2.95, 3.20 and 3.30 GeV/c beam

Proton-Proton Interaction in the GeV Region

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