Dispersive construction of two-loop P -> pi pi pi(P = K, eta) amplitudes
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F20%3A10421974" target="_blank" >RIV/00216208:11320/20:10421974 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=Y8lxZw4QwH" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=Y8lxZw4QwH</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevD.101.074043" target="_blank" >10.1103/PhysRevD.101.074043</a>
Alternative languages
Result language
angličtina
Original language name
Dispersive construction of two-loop P -> pi pi pi(P = K, eta) amplitudes
Original language description
We present and develop a general dispersive framework allowing us to construct representations of the amplitudes for the processes P pi -> pi pi, P = K, eta, valid at the two-loop level in the low-energy expansion. The construction proceeds through a two-step iteration, starting from the tree-level amplitudes and their S and P partial-wave projections. The one-loop amplitudes are obtained for all possible configurations of pion masses. The second iteration is presented in detail in the cases where either all masses of charged and neutral pions are equal or for the decay into three neutral pions. Issues related to analyticity properties of the amplitudes and of their lowest partial-wave projections are given particular attention. This study is introduced by a brief survey of the situation, for both experimental and theoretical aspects, of the decay modes into three pions of charged and neutral kaons and of the eta meson.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10303 - Particles and field physics
Result continuities
Project
<a href="/en/project/GA18-17224S" target="_blank" >GA18-17224S: Study of amplitudes of effective field theories in particle physics</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review D
ISSN
2470-0010
e-ISSN
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Volume of the periodical
101
Issue of the periodical within the volume
7
Country of publishing house
US - UNITED STATES
Number of pages
41
Pages from-to
074043
UT code for WoS article
000529308300005
EID of the result in the Scopus database
2-s2.0-85084597280