Improvement of pi pi amplitudes and correct position of the sigma pole
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F14%3A00486422" target="_blank" >RIV/61389005:_____/14:00486422 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1051/epjconf/20148105022" target="_blank" >http://dx.doi.org/10.1051/epjconf/20148105022</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/epjconf/20148105022" target="_blank" >10.1051/epjconf/20148105022</a>
Alternative languages
Result language
angličtina
Original language name
Improvement of pi pi amplitudes and correct position of the sigma pole
Original language description
Meson-meson interaction amplitudes especially pi pi scattering amplitudes are often used incorrectly. It also applies to parameters of the sigma meson. These causes two significant problems: threshold behavior and position of the sigma pole which is suspicious. We modified multichannel S- and P-wave amplitudes for the pi pi scattering, using dispersion relations with imposed crossing symmetry condition. The amplitudes are modified in the low-energy region to improve their consistency with experimental data and the dispersion relations. Agreement with data is achieved for both amplitudes from the threshold up to 1800 MeV and with dispersion relations up to 1100 MeV. Consequences of the applied modifications, e.g. changes of the S-wave lowest-pole positions, are presented.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
Result continuities
Project
<a href="/en/project/GAP203%2F12%2F2126" target="_blank" >GAP203/12/2126: Microscopic models for the description of hadronic systems</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
EPJ Web of Conferences
ISBN
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ISSN
2100-014X
e-ISSN
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Number of pages
4
Pages from-to
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Publisher name
EDP Sciences
Place of publication
Les Ulis
Event location
Cracow
Event date
May 29, 2014
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000351440900093