Measurement of the reaction π+ p→π+π+ n near threshold

Kernel, G.; Korbar, D.; Križan, P.; Mikuž, M.; Seljak, U.; Sever, F.; Stanovnik, A.; Starič, M.; Zavrtanik, D.; Eijk, C.W.E. van; Hollander, R.W.; Lourens, W.; Michaelis, F. G.; Tanner, N.W.; Clark, S. A.; Jovanovich, J. V.; Davies, John Dwyfor; Lowe, J.; Playfer, S.

doi:10.1007/bf01554466

Cited by 32 publications

(10 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The last column provides the characteristics of the fit -χ 2 DF . To make the comparison easy the additional row IND contains the results of individual fits of every channel (in the case of the {+ + n} channel three additional fits with the exclusion of the controversial data sets, namely [72] and [43], were performed). The last two rows present the predictions of eqs.…”

Section: Resultsmentioning

confidence: 99%

“…Their symbolic notations, entering the summary Table 7, are: ALL -variant with all the data being included; OMI -in this variant the data [72] are omitted; TRI -variant with the exclusion of the data [43]; X -the variant in which both sets [72] and [43] are excluded. The notation IND is used for the case when the data in each channel are fitted separately (the channel {+ + n} was treated in accordance with the selection adopted in ALL, OMI, TRI and X variants).…”

Section: Methodsmentioning

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%

“…The separate attention we pay to the {+ + n} channel. There are two sets of the near threshold data in the channel {++n}, namely, [43] and [72] which are in certain disagreement. They lead to different threshold limits |M 0 {++n} |.…”

Section: Databasementioning

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%

See 4 more Smart Citations

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

Bolokhov

Polyakov²,

Sherman³

1998

EPJ A

View full text Add to dashboard Cite

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

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Experimental Basementioning

confidence: 99%

Section: Databasementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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

Bolokhov

Polyakov²,

Sherman³

1998

EPJ A

View full text Add to dashboard Cite

show abstract

Experimental study of π− π+ system at low invariant-masses

Kernel

Korbar

Križan

et al. 1991

Z. Phys. C - Particles and Fields

View full text Add to dashboard Cite

Baryon chiral perturbation theory A.D. 1994

Meißner

1995

Czech J Phys

View full text Add to dashboard Cite

In these lectures, the status of baryon chiral perturbation theory is reviewed. Particular emphasis is put on the two-flavor sector and the physics related to electromagnetic probes. I discuss in some detail the structure of the effective Lagrangian at next-to-leading order, the meaning of low-energy theorems in Compton scattering and pion photoproduction and confront the chiral predictions with the existing data. Some remaining problems and challenges are outlined.

show abstract

Measurement of the reaction π+ p→π+π+ n near threshold

Cited by 32 publications

References 19 publications

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

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

Experimental study of π− π+ system at low invariant-masses

Baryon chiral perturbation theory A.D. 1994

Contact Info

Product

Resources

About