Are Some $\pi N$ Resonances a Manifestation of Coupling to the $\pi \Delta(1232)$ Channel?

Blankleider, B.; Walker, G.E.

doi:10.1016/0370-2693(85)90497-6

Are Some $\pi N$ Resonances a Manifestation of Coupling to the $\pi \Delta(1232)$ Channel?

B. Blankleider
(
- Indiana U.
)
,
G.E. Walker
(
- Indiana U.
)

Dec, 1984

4 pages

Published in:

Phys.Lett.B 152 (1985) 291-294

Published: 1985

DOI:

10.1016/0370-2693(85)90497-6

Report number:

Print-84-1029 (INDIANA)

View in:

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Abstract: (Elsevier)

Using separable potentials for the processes π N → π N, π N → πΔ , and πΔ → πΔ , we investigate the possibility that some of the low lying resonances seen in π −N elastic scattering may be due to the opening of the threshold for π − Δ production. We find excellent fits to the P 11 , D 13 , D 15 , and S 31 phase shifts and inelasticities without the need for introducing the P 11 (1440), D 13 (1520), D 15 (1675), and S 31 (1620) resonances explicitly. While not claiming that true particle resonances do not exist, our results indicate that coupling to the π − Δ channel should not be ignored.

PI NUCLEON: ELASTIC SCATTERING
ELASTIC SCATTERING: PI NUCLEON
MODEL: SEPARABLE POTENTIAL
NUCLEON RESONANCE: HADROPRODUCTION
HADROPRODUCTION: NUCLEON RESONANCE
DELTA(1232): HADROPRODUCTION
HADROPRODUCTION: DELTA(1232)
PARTIAL WAVE ANALYSIS
MODEL: BAG
NUMERICAL CALCULATIONS

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Are Some πN\pi NπN Resonances a Manifestation of Coupling to the πΔ(1232)\pi \Delta(1232)πΔ(1232) Channel?

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Are Some $\pi N$ Resonances a Manifestation of Coupling to the $\pi \Delta(1232)$ Channel?