Measurement of the spin rotation parameters R and A in πp elastic scattering and a test of πN partial-wave analyses in the region of low-lying P11, S11 and D13 resonances

Lopatin, I.; Abaev, V. V.; Bazhanov, N. A.; Bekrenev, V.; Beloglazov, Y. A.; Filimonov, E. A.; Kovalyov, A. I.; Kozlenko, N.; Kruglov, S. P.; Kulbardis, A. A.; Lapochkina, L.V.; Polyakov, V. V.; Shchedrov, V.A.; Shvedchikov, A. V.; Sumachev, V. V.; Tkach, Igor; Trautman, V. Yu.

doi:10.1016/0375-9474(94)90332-8

Cited by 5 publications

(3 citation statements)

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“…Most of new π ± p differential cross sections and analyzing powers above 780 MeV were measured at ITEP [11,12]. Some proton spin rotation parameters were measured below 600 MeV at SPNPI [19] and at 1300 MeV at ITEP [24].…”

Section: The Databasementioning

confidence: 99%

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Updated analysis of πNelastic scattering data to 2.1 GeV: The baryon spectrum

et al. 1995

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We present the results of energy-dependent and single-energy partial-wave analyses of πN elastic scattering data with laboratory kinetic energies below 2.1 GeV. Resonance structures have been extracted using Breit-Wigner fits, speed plots, and a complex plane mapping of the associated poles and zeroes. This is the first set of resonance parameters from a VPI analysis constrained by fixed-t dispersion relations. We have searched our solutions for structures which may have been missed in our previous analyses, finding candidates in the S 11 and F 15 partial-wave amplitudes. Our results are compared with those found by the Karlsruhe, Carnegie-Mellon−Berkeley, and Kent State groups.

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Section: The Databasementioning

confidence: 99%

“…Some proton spin rotation parameters were measured below 600 MeV at SPNPI [19] and at 1300 MeV at ITEP [24].…”

Section: The Databasementioning

confidence: 99%

Updated analysis of πNelastic scattering data to 2.1 GeV: The baryon spectrum

et al. 1995

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“…In particular, we focus on the KH and CMB analyses, as no SR data were available in the resonance region when these analyses were performed. Measurements of R and A between 300 MeV and 600 MeV were recently made at LAMPF [4] and PNPI [5].…”

Section: Introductionmentioning

confidence: 99%

Influence of spin-rotation measurements on partial-wave analyses of elastic pion-nucleon scattering

Alekseev¹,

Kanavets²,

Morozov³

et al. 1997

Phys. Rev. C

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Recent measurements of spin-rotation parameters in elastic π + p scattering are in marked disagreement with predictions of the Carnegie-Mellon−Berkeley and Karlsruhe-Helsinki analyses. Using the method of Barrelet, we show how this discrepancy can be removed. We then show how this Barrelet transformation alters the partial-wave amplitudes. The effect of unitarity and analyticity constraints is also considered.

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