Measurement of the total and differential cross sections for the reaction π − p → ηn with the Crystal Ball detector

Kozlenko, N.; Abaev, V. V.; Bekrenev, V.; Kruglov, S. P.; Koulbardis, A.; Lopatin, I.; Starostin, A.; Draper, B.L.; Hayden, S.; Huddleston, J.; Isenhower, D.; Robinson, Clark S.; Sadler, M. E.; Allgower, C.; Cadman, R. V.; Spinka, H.; Comfort, J.R.; Craig, K.; Ramirez, A. F.; Kycia, T. F.; Clajus, M.; Marušić, A.; McDonald, S.; Nefkens, B. M. K.; Phaisangittisakul, N.; Prakhov, S.; Price, J. W.; Tippens, W. B.; Peterson, J.; Briscoe, W. J.; Shafi, A.; Strakovsky, I. I.; Staudenmaier, H. M.; Manley, D. M.; Olmsted, J.; Peaslee, D. C.; Knecht, N. S.; Lolos, G. J.; Papandreou, Z.; Supek, I.; Šlaus, I.; Gibson, A.; Grosnic, D.; Koetke, D. D.; Manweiler, R.; Stanislaus, S.

doi:10.1134/1.1540664

Cited by 10 publications

(27 citation statements)

References 7 publications

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“…[35][36][37]. These data are from two targets -hydrogen [35,36] and Polyethylene [37]. Both sets are consistent with each other, but here we use the latter, since there a more detailed discussion is made concerning uncertainties in the pion beam momentum.…”

Section: The Choice Of Data and Resultssupporting

confidence: 55%

“…However, it should be added that the question of how the spread in the pion beam momentum affects the final value of the cross section is not yet fully resolved to the satisfaction of all the authors in Refs. [35][36][37]. Fortunately, as we shall see later, such refinements are not expected to change any of the conclusions arrived at in this paper.…”

Section: The Choice Of Data and Resultsmentioning

confidence: 72%

“…[37], in set C we omit the Crystal Barrel data from set A. We see that, within the errors, the three complex parameters a, r 0 and s are unchanged.…”

Section: The Choice Of Data and Resultsmentioning

confidence: 93%

“…The new ingredient is the recent Brookhaven Crystal Ball data in Refs. [35][36][37]. These data are from two targets -hydrogen [35,36] and Polyethylene [37].…”

Section: The Choice Of Data and Resultsmentioning

confidence: 99%

“…(2), these background terms turn out to be very small with the exception of B η,η , which generates a sizeable contribution to the value of the ηN scattering length and the values of the scattering amplitudes at negative energies. In this note, the calculation is extended to include the new Brookhaven Crystal Ball data for the πN → ηN cross section measured close to the ηN threshold [35][36][37]. These now replace the ones from the review by Nefkens [26], used in Refs.…”

Section: Introductionmentioning

confidence: 99%

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Erratum: η-nucleon scattering length and effective range uncertainties [Phys. Rev. C 71, 014001 (2005)]

Green¹,

Wycech²

2005

Phys. Rev. C

181

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The coupled ηN , πN , γN , ππN system is described by a K-matrix method. The parameters in this model are adjusted to get an optimal fit to πN → πN , πN → ηN , γN → πN and γN → ηN data in an energy range of about 100 MeV or so each side of the η-threshold. Compared with our earlier analysis, we now utilize recent Crystal Ball data. However, the outcome confirms our previous result that the η-nucleon scattering length (a) is large with a value of 0.91(6)+i0.27(2) fm.PACS numbers: 13.75.-n, 25.80.-e, 25.40.V

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Section: The Choice Of Data and Resultssupporting

confidence: 55%

Section: The Choice Of Data and Resultsmentioning

confidence: 72%

“…[37], in set C we omit the Crystal Barrel data from set A. We see that, within the errors, the three complex parameters a, r 0 and s are unchanged.…”

Section: The Choice Of Data and Resultsmentioning

confidence: 93%

“…The new ingredient is the recent Brookhaven Crystal Ball data in Refs. [35][36][37]. These data are from two targets -hydrogen [35,36] and Polyethylene [37].…”

Section: The Choice Of Data and Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Erratum: η-nucleon scattering length and effective range uncertainties [Phys. Rev. C 71, 014001 (2005)]

Green¹,

Wycech²

2005

Phys. Rev. C

181

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Hyperon resonances in coupled channels and Crystal Ball data

Manley

2005

Nuclear Physics A

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Progress towards understanding baryon resonances

2013

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Abstract. The composite nature of baryons manifests itself in the existence of a rich spectrum of excited states, in particular in the important mass region 1-2 GeV for the light-flavoured baryons. The properties of these resonances can be identified by systematic investigations using electromagnetic and strong probes, primarily with beams of electrons, photons, and pions. After decades of research, the fundamental degrees of freedom underlying the baryon excitation spectrum are still poorly understood. The search for hitherto undiscovered but predicted resonances continues at many laboratories around the world. Recent results from photo-and electroproduction experiments provide intriguing indications for new states and shed light on the structure of some of the known nucleon excitations. The continuing study of available data sets with consideration of new observables and improved analysis tools have also called into question some of the earlier findings in baryon spectroscopy. Other breakthrough measurements have been performed in the heavy-baryon sector, which has seen a fruitful period in recent years, in particular at the B factories and the Tevatron. First results from the LHC indicate rapid progress in the field of bottom baryons. In this review, we discuss the recent experimental progress and give an overview of theoretical approaches.

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Measurement of the total and differential cross sections for the reaction π − p → ηn with the Crystal Ball detector

Cited by 10 publications

References 7 publications

Erratum: η-nucleon scattering length and effective range uncertainties [Phys. Rev. C 71, 014001 (2005)]

Erratum: η-nucleon scattering length and effective range uncertainties [Phys. Rev. C 71, 014001 (2005)]

Hyperon resonances in coupled channels and Crystal Ball data

Progress towards understanding baryon resonances

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