The reactions K− + p → pseudoscalar meson + Λ (1520) at 4.2 GeV/c

Barlag, S.; Blokzijl, R.; Jongejans, B.; Kluyver, J.C.; Massaro, G.; Hemingway, R.J.; Holmgren, S. O.; Losty, M. J.; Metzger, W. J.; Schotanus, D. J.; Timmermans, J.J.M.; Foster, B.; Grossmann, P.; Wells, James D.

doi:10.1016/0550-3213(79)90238-4

Cited by 6 publications

(6 citation statements)

References 24 publications

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“…It is worth to note, however, that the uncertainties in the later works [8] and [9] are larger than those in all the earlier works. This may hint that the uncertainties stated in the earlier works (and, therefore, in the average) are too optimistic.…”

Section: Results and Their Discussioncontrasting

confidence: 40%

“…[9] obtain the Λ(1520) mass mainly from mass distributions in different decay channels, π − Σ + and π + Σ − , with small addition of Λπ + π − events. The resonance width is extracted only from the Λπ + π − events.…”

Section: Current Parameters Of the λ(1520)mentioning

confidence: 99%

“…However, they use different approaches to this task. Most papers deal with the resonance production [8][9][10][11]. They study various inelastic reactions, with various many-particle final states, and look for a peak in the mass distribution of one or another final subsystem.…”

Section: Current Parameters Of the λ(1520)mentioning

confidence: 99%

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Properties of the Λ(1520) resonance from high-precision electroproduction data

et al. 2010

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High-resolution spectrometer measurements of the reaction H(e, e ′ K + )X at small Q 2 are used to extract the mass and width of the Λ(1520). We investigate the influence of various assumptions used in the extraction. The width appears to be more sensitive to the assumptions than the mass. To reach a width uncertainty about 1 MeV or better, one needs to know the structure of the nonresonant background. Based on the new Jefferson Lab Hall A data, our final values for the BreitWigner parameters are M = 1520.4±0.6(stat.)±1.5(syst.) MeV, Γ = 18.6±1.9(stat.)±1(syst.) MeV. We also estimate, for the first time, the pole position for this resonance and find that both the pole mass and width seem to be smaller than their Breit-Wigner values.

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Section: Results and Their Discussioncontrasting

confidence: 40%

Section: Current Parameters Of the λ(1520)mentioning

confidence: 99%

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Properties of the Λ(1520) resonance from high-precision electroproduction data

et al. 2010

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“…However, they use different approaches to this task. Most papers deal with the resonance production [8][9][10][11]. They study FIG.…”

Section: Current Parameters Of the λ(1520)mentioning

confidence: 99%

“…On the other hand, the authors of Ref. [9] obtain the Λ(1520) mass mainly from mass distributions in different decay channels, π − Σ + and π + Σ − , with small addition of Λπ + π − events. The resonance width is extracted only from the Λπ + π − events.…”

Section: Current Parameters Of the λ(1520)mentioning

confidence: 99%

Properties of the Lambda(1520) Resonance from High-Precision Electroproduction Data

Qiang,

Azimov,

Strakovsky

et al. 2010

Preprint

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High-resolution spectrometer measurements of the reaction H(e, e ′ K + )X at small Q 2 are used to extract the mass and width of the Λ(1520). We investigate the influence of various assumptions used in the extraction. The width appears to be more sensitive to the assumptions than the mass. To reach a width uncertainty about 1 MeV or better, one needs to know the structure of the nonresonant background. Based on the new Jefferson Lab Hall A data, our final values for the Breit-Wigner parameters are M = 1520.4±0.6(stat.)±1.5(syst.) MeV, Γ = 18.6±1.9(stat.)±1(syst.) MeV. We also estimate, for the first time, the pole position for this resonance and find that both the pole mass and width seem to be smaller than their Breit-Wigner values.

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