Coupled channel analysis of data on [ital [bar p]p][r arrow]3[pi][sup 0], [eta][eta][pi][sup 0], and [eta][pi][sup 0][pi][sup 0] at rest, with the [ital N]/[ital D] method

Journal Article · Sat Oct 01 00:00:00 EDT 1994 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.50.4412· OSTI ID:7007206

Bugg, D V ^[1]; Anisovich, V V; Sarantsev, A ^[2]; Zou, B S ^[1]

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1. Queen Mary and Westfield College, London E14NS (United Kingdom)
2. Queen Mary and Westfield College, London E14NS (United Kingdom) St. Petersburg Nuclear Physics Institute, Gatchina, St. Petersburg district, 188350 (Russian Federation)

Details are presented from a coupled channel analysis of Crystal Barrel data on [ital [bar p]p][r arrow]3[pi][sup 0], [eta][eta][pi][sup 0], and [eta][pi][sup 0][pi][sup 0] at rest, together with the [pi][pi] [ital S]-wave phase shift up to 1.2 GeV. The annihilation data were well fitted with a pure [sup 1][ital S][sub 0] initial state using consistent parameters for resonances in all channels. The annihilation data require two [ital I]=0, [ital J][sup [ital P][ital C]]=0[sup ++] resonances with masses and widths [ital M], [Gamma] where [ital M][sub 1]=1340[plus minus]40 MeV, [Gamma]=255[sub [minus]40][sup +60] MeV and [ital M][sub 2]=1505[plus minus]20 MeV, [Gamma][sub 2]=150[plus minus]20 MeV; the [eta][pi][sup 0][pi][sup 0] data require an [ital I]=1, [ital J][sup [ital P][ital C]]=0[sup ++] resonance with [ital M][sub 3]=1435[plus minus]40 MeV and [Gamma][sub 3]=270[plus minus]40 MeV. The [ital a][sub 0](980) is fitted with a Flatte form with [ital M]=999[plus minus]5 MeV, [ital g][sub [eta][pi]]=221[plus minus]20 MeV, and [ital r]=[ital g][sub [ital K][ital K]]/[ital g][sub [eta][pi]]=1.16[plus minus]0.18. The [eta][pi][pi] data suggest a significantly larger width, [Gamma]=75 MeV, for [ital f][sub 0](975) than earlier data. They also require an appreciable [eta][pi] [ital P] wave, which shows weak phase variation and is therefore probably nonresonant.

• OSTI ID: 7007206
• Journal Information: Physical Review, D (Particles Fields); (United States), Vol. 50:7; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
PROTON-ANTIPROTON INTERACTIONS
COUPLED CHANNEL THEORY
ANNIHILATION
ETA MESONS
MASS
PHASE SHIFT
PIONS NEUTRAL
RESONANCE
S WAVES
WIDTH
BARYON-BARYON INTERACTIONS
BASIC INTERACTIONS
BOSONS
DIMENSIONS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
MESONS
NUCLEON-ANTINUCLEON INTERACTIONS
PARTIAL WAVES
PARTICLE INTERACTIONS
PIONS
PSEUDOSCALAR MESONS
662340* - Hadron Interactions- (1992-)
662420 - Properties of Mesons & Meson Resonances- (1992-)