S.N. Cherry
There is no /κ(900)
Cherry, S.N.; Pennington, M.R.
Authors
M.R. Pennington
Abstract
In the I=0 sector there are more scalar mesons than can fit in one nonet. Consequently, many have claimed that there is in fact more than one multiplet, perhaps both and . Such proposals require the existence of at least two strange isodoublets (and their antiparticles). The current PDG tables list just one state, the K*0(1430), while fits to data with Breit–Wigner forms and variable backgrounds can accommodate a κ(900), too. Whether a state exists in the spectrum of hadrons is not a matter of ability to fit data along the real energy axis, but is completely specified by the number of poles in the complex energy plane. Here we perform as model-independent an analytic continuation of the LASS πK scattering results between 825 MeV and 2 GeV as presently possible to determine the number and position of resonance poles. We find that there is a K*0(1430), but no κ(900). The LASS data cannot rule out the possibility of a very low mass κ well below 825 MeV.
Citation
Cherry, S., & Pennington, M. (2001). There is no /κ(900). Nuclear Physics A, 688(3-4), 823-841. https://doi.org/10.1016/s0375-9474%2800%2900587-x
Journal Article Type | Article |
---|---|
Publication Date | Jun 4, 2001 |
Deposit Date | Dec 15, 2006 |
Journal | Nuclear Physics A |
Print ISSN | 0375-9474 |
Publisher | Elsevier |
Peer Reviewed | Peer Reviewed |
Volume | 688 |
Issue | 3-4 |
Pages | 823-841 |
DOI | https://doi.org/10.1016/s0375-9474%2800%2900587-x |
Keywords | Analytic properties, Scalar mesons, Strange mesons. |
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