Dispersive construction of two-loop P -> pi pi pi(P = K, eta) amplitudes

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Dispersive construction of two-loop P -> pi pi pi(P = K, eta) amplitudes

Popis výsledku v původním jazyce

We present and develop a general dispersive framework allowing us to construct representations of the amplitudes for the processes P pi -&gt; 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.

Název v anglickém jazyce

Dispersive construction of two-loop P -> pi pi pi(P = K, eta) amplitudes

Popis výsledku anglicky

We present and develop a general dispersive framework allowing us to construct representations of the amplitudes for the processes P pi -&gt; 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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

<a href="/cs/project/GA18-17224S" target="_blank" >GA18-17224S: Studium amplitud efektivních polních teorií v částicové fyzice</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review D

ISSN

2470-0010

e-ISSN

—

Svazek periodika

101

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

41

Strana od-do

074043

Kód UT WoS článku

000529308300005

EID výsledku v databázi Scopus

2-s2.0-85084597280