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Lowe, J.; Bassalleck, B.; Burkhardt, Hugh; Fickinger, W.; Hall, J.H.; Hasinoff,; Horváth, D.; Koch, G.; Larson, K. D.; Miller, J.; Noble, A. J.; Roberts, B. L.; Robinson, D. K.; Sakitt, M.; Sevior, M. E.; Tanner, NW; Waltham, C. E.; Warner, T. M.; Wolfe, D.

doi:10.1103/physrevc.44.956

Cited by 41 publications

(16 citation statements)

References 25 publications

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“…The data from Refs. [24,25,26] for π + p → π + π + n, [27,28,29,30,31,32,33,34,35,36] for π − p → π + π − n, and [37,38,39,40,41] for π − p → π 0 π 0 n. section indicates the increase by about 25 % with R N ∆ = 0.4 and 65 % with R N ∆ = 0.8 around T π = 300 MeV. These two channels exhibit large influence of the π∆∆ interaction on the total cross section.…”

Section: Resultsmentioning

confidence: 99%

Δ(1232)inπN→ππNreaction

Kammano

Masaki

2004

Phys. Rev. C

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The contribution of ∆(1232) to the πN → ππN reaction is examined by making use of the chiral reduction formula developed by Yamagishi and Zahed. The influence of the π∆∆ and ρN ∆ interactions on this reaction, which has not been regarded as important so far, is considered for all channels with the initial π ± p states. The total cross sections are calculated to tree level for the energy up to T π = 400 MeV. Although the π∆∆ and ρN ∆ interactions give a small effect on the π + p → π + π + n, π − p → π + π − n, and π − p → π 0 π 0 n channels, the π ± p → π ± π 0 p channels are found to be sensitive to these interactions.

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Section: Resultsmentioning

confidence: 99%

Δ(1232)inπN→ππNreaction

Kammano

Masaki

2004

Phys. Rev. C

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“…It should be noted, that before the OMICRON measurements [41]- [44] only the {− + n} channel allowed to obtain the definite results of the linear fit; the above mentioned OMICRON data provided the possibility to carry out the procedure also for the {− 0 p} and {+ + n} channels. The authors of the paper [27] took advantage of the precise data [53] on the σ {00n} (very close to threshold) and provided the simultaneous linear fit of all channels.…”

Section: Databasementioning

confidence: 99%

“…We are using the total cross sections data [3], [4], [5], [6], [7], [9], [15], [16], [17], [18], [25], [26], [28], [38], [41], [42], [43], [45], [46], [48], [49], [53], [64], [66], [71], [72], [76]. 94 points were selected on the grounds of the compatibility analysis of the paper [80] from the total list of 105 experimental points.…”

Section: Experimental Basementioning

confidence: 99%

“…Some experiments listed in ref. [68] had already been finished: BNL and LAMPF results on total cross sections have been published [53], [66] .html), higher distributions are in progress, the off-line treatment of experimental tapes of the TRI-UMF experiment [75] will be completed soon. Therefore, it is timely to make the solution which theoretical method from the above list is capable to provide more reliable treatment of the modern π2π experiments.…”

Section: Introductionmentioning

confidence: 99%

“…These formulae have gained a broad scale of application, especially in the recent years when new data on the πN → ππN reactions in the close-to-threshold energy region became available [42,41,43,44], [72,53,66].…”

Section: Introductionmentioning

confidence: 99%

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Phenomenological πN→ππN amplitude and analysis of low energy data on total cross sections and 1--D distributions

Bolokhov

Polyakov²,

Sherman³

1998

EPJ A

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We develop the phenomenological amplitude of the πN → ππN reaction describing the exchanges of ∆ and N * along with the OPE mechanism. The contribution of the latter contains 4 independent low energy parameters (up to O(k 4 ) order). The terms of the polynomial background are added to stand for far resonances and for contact terms originating from the off-mass-shell interactions. These terms are introduced with the account of isotopic, crossing, C, P and T symmetries of strong interactions.The data consisting of total cross sections in the energy region 0.300 ≤ P Lab ≤ 500 MeV/c and 1D distributions from the bubble-chamber experiments for three reaction channels were undergoing fittings to determine free parameters of the amplitude. The best solutions are characterized by χ 2 DF = 1.16. At the considered energies the isobar exchanges are found to be more important than OPE. The obtained solutions reveal the need in more precise data and/or in polarization measurements because of large correlations of isobar parameters with the OPE ones.The theoretical solutions were used for modeling the Chew-Low extrapolation and the Olsson-Turner threshold approach. It is shown that the noncritical application of the former results in 100% theoretical errors, the extracted values being in fact the random numbers. The results of the Olsson-Turner method are characterized by significant systematic errors coming from unknown details of isobar physics. Sankt-Petersburg 1997

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Summary of π-π scattering experiments

Počanić

Chiral Dynamics: Theory and Experiment

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The ππ scattering amplitude at threshold is fully determined by the chiral symmetry breaking part of the strong interaction, and, thus, directly constrains the form of the low energy effective lagrangians. Current status of the study of the low energy ππ interaction is discussed, particularly the recent results on reactions πN → ππN near threshold. Present levels of experimental uncertainties and limitations inherent to the available analysis methods leave ample room for improvements in the determination of the s-wave ππ scattering lengths. Experimental improvements are expected from new measurements of K e4 decays and from attempts to study π + π − atoms, while further theoretical work is required in order to make full use of the extensive near-threshold πN → ππN data that has recently become available.

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π−p→π0
J. Lowe
¹
,
B. Bassalleck
²
,
Hugh Burkhardt
³

et al.

Cited by 41 publications

References 25 publications

Δ(1232)inπN→ππNreaction

Δ(1232)inπN→ππNreaction

Phenomenological πN→ππN amplitude and analysis of low energy data on total cross sections and 1--D distributions

Summary of π-π scattering experiments

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About

π−p→π0J. Lowe1, B. Bassalleck2, Hugh Burkhardt3 et al.

Cited by 41 publications

References 25 publications

Δ(1232)inπN→ππNreaction

Δ(1232)inπN→ππNreaction

Phenomenological πN→ππN amplitude and analysis of low energy data on total cross sections and 1--D distributions

Summary of π-π scattering experiments

Contact Info

Product

Resources

About

π−p→π0
J. Lowe
¹
,
B. Bassalleck
²
,
Hugh Burkhardt
³

et al.