Is [ital f][sub 0](975) a narrow resonance

Journal Article · Mon Nov 01 04:00:00 EST 1993 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.48.R3948· OSTI ID:5925418

Zou, B S; Bugg, D V ^[1]

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1. Queen Mary and Westfield College, London E1 4NS (United Kingdom)

We use a new approach to study the [pi][pi], [ital K] [bar K] [ital I]=[ital J]=0 interaction from information on the central production and elastic processes with energies from the [pi][pi] threshold to 1.7 GeV. Our amplitude analysis separates the pole term for [ital f][sub 0](975) from the background term, meanwhile enforcing unitarity. A second-sheet pole (988[minus]23[ital i] MeV) and a third-sheet pole (797[minus]185[ital i] MeV) are found for [ital f][sub 0](975). We conclude that if the [ital f][sub 0](975) is a Breit-Wigner resonance, it has a large decay width corresponding to its third-sheet pole, but shows up as a narrow structure in [pi][pi] and [ital K] [bar K] invariant mass spectra due to its second-sheet pole. An alternative [ital K]-matrix analysis is also briefly reported, which gives a similar conclusion.

• OSTI ID: 5925418
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 48:9; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662130 -- General Theory of Particles & Fields-- S-Matrix Theory
Relativistic Scattering Theory-- (1992-)
662340 -- Hadron Interactions-- (1992-)
662420* -- Properties of Mesons & Meson Resonances-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANTIKAONS
ANTIMATTER
ANTIPARTICLES
BOSONS
BREIT-WIGNER FORMULA
ELEMENTARY PARTICLES
F0-975 MESONS
HADRONS
KAONS
MASS SPECTRA
MATTER
MESONS
PHASE SHIFT
PIONS
PSEUDOSCALAR MESONS
RESONANCE
SCALAR MESONS
SPECTRA
STRANGE MESONS
STRANGE PARTICLES
UNITARITY