Search for higher flavor multiplets in partial-wave analyses

The possible existence of higher multi-quark flavor multiplets of baryons is investigated. We argue that the S-matrix should have poles with any quantum numbers, including those which are exotic. This argument provides a novel justification for the existence of hadrons with arbitrary exotic structur...

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Bibliographic Details
Published inThe European physical journal. A, Hadrons and nuclei Vol. 26; no. 1; pp. 79 - 88
Main Authors Azimov, Ya. I., Arndt, R. A., Strakovsky, I. I., Workman, R. L., Goeke, K.
Format Journal Article
LanguageEnglish
Published United States 01.10.2005
Subjects
BARYONS
DECAY
HADRONS
MULTIPLETS
PARTIAL WAVES
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
QUANTUM NUMBERS
S MATRIX
SCATTERING
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Summary:The possible existence of higher multi-quark flavor multiplets of baryons is investigated. We argue that the S-matrix should have poles with any quantum numbers, including those which are exotic. This argument provides a novel justification for the existence of hadrons with arbitrary exotic structure. Though it does not constitute a proof, there are still no theoretical arguments against exotics. We then consider KN and piN scattering. Conventional and modified partial-wave analyses provide several sets of candidates for correlated pairs (Theta1, Delta), each of which could label a related 27-plet. Properties of the pairs (masses, mass orderings, spin-parity quantum numbers) do not quite correspond to the current theoretical expectations. Decay widths of the candidates are either wider or narrower than expected. Possible reasons for such disagreements are briefly discussed.
Bibliography:JLAB-PHY-05-16; DOE/ER/40150-3289; hep-ph/0504022
USDOE Office of Energy Research (ER) (US)
AC05-84ER40150
ISSN:1434-6001
1434-601X
DOI:10.1140/epja/i2005-10150-y