Masses and widths of scalar-isoscalar multi-channel resonances from data analysis

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F14%3A00425770" target="_blank" >RIV/61389005:_____/14:00425770 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1088/0954-3899/41/2/025006" target="_blank" >http://dx.doi.org/10.1088/0954-3899/41/2/025006</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/0954-3899/41/2/025006" target="_blank" >10.1088/0954-3899/41/2/025006</a>

Result language
angličtina
Original language name
Masses and widths of scalar-isoscalar multi-channel resonances from data analysis
Original language description
The peculiarities of obtaining parameters for broad multi-channel resonances from data are discussed, analyzing the experimental data on processes pi pi -> pi pi, K (K) over bar in the I(G)J(PC) = 0(+)0(++) channel in a model-independent approach based on analyticity and unitarity, and using an uniformization procedure. We show that it is possible to obtain a good description of the pi pi scattering data from the threshold to 1.89 GeV with parameters of resonances cited in the Particle Data Group tablesas preferred. However, in this case, first, the representation of the pi pi background is unsatisfactory; second, the data on the coupled process pi pi -> K (K) over bar are not well described even qualitatively above 1.15 GeV when using the resonance parameters from only the pi pi scattering analysis. The combined analysis of these coupled processes is needed, and is carried out satisfactorily. Then, both of the above-indicated issues related to the analysis of pi pi scattering only ar
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BE - Theoretical physics
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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