Decays of neutral pions: Electromagnetic transition form factor and radiative corrections

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F17%3A10371583" target="_blank" >RIV/00216208:11320/17:10371583 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1051/epjconf/201713705006" target="_blank" >http://dx.doi.org/10.1051/epjconf/201713705006</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/epjconf/201713705006" target="_blank" >10.1051/epjconf/201713705006</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Decays of neutral pions: Electromagnetic transition form factor and radiative corrections

Popis výsledku v původním jazyce

We briefly summarize experimental and theoretical results on the rare decay pi(0) -&gt; e (+) e(-). The notorious 3.3 sigma discrepancy between the Standard Model prediction and the experimental value provided by KTeV collaboration is discussed in the view of a complete set of next- to- leading- order QED radiative corrections. We also present the Two- Hadron Saturation (THS) scenario for the PVV correlator and apply it to the decay under discussion. The discrepancy under discussion then reduces down to 1.8 sigma. Finally, we turn our attention the the Dalitz decay pi(0) -&gt; e (+) e(-). We have recalculated the Mikaelian and Smith radiative corrections beyond the soft- photon approximation, i.e. over the whole range of the Dalitz plot and with no restrictions on the radiative photon. In contrast to the previous calculations, we also included the one- photon irreducible contribution at one- loop level. Our results can be also used for a further treatment of the processes with heavier particles in the final state.

Název v anglickém jazyce

Decays of neutral pions: Electromagnetic transition form factor and radiative corrections

Popis výsledku anglicky

We briefly summarize experimental and theoretical results on the rare decay pi(0) -&gt; e (+) e(-). The notorious 3.3 sigma discrepancy between the Standard Model prediction and the experimental value provided by KTeV collaboration is discussed in the view of a complete set of next- to- leading- order QED radiative corrections. We also present the Two- Hadron Saturation (THS) scenario for the PVV correlator and apply it to the decay under discussion. The discrepancy under discussion then reduces down to 1.8 sigma. Finally, we turn our attention the the Dalitz decay pi(0) -&gt; e (+) e(-). We have recalculated the Mikaelian and Smith radiative corrections beyond the soft- photon approximation, i.e. over the whole range of the Dalitz plot and with no restrictions on the radiative photon. In contrast to the previous calculations, we also included the one- photon irreducible contribution at one- loop level. Our results can be also used for a further treatment of the processes with heavier particles in the final state.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

<a href="/cs/project/GA15-18080S" target="_blank" >GA15-18080S: Efektivní teorie pole: principy a fenomenologie</a><br>

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název statě ve sborníku

XIITH QUARK CONFINEMENT AND THE HADRON SPECTRUM

ISBN

—

ISSN

2100-014X

e-ISSN

neuvedeno

Počet stran výsledku

8

Strana od-do

—

Název nakladatele

E D P SCIENCES

Místo vydání

CEDEX A

Místo konání akce

Thessaloniki

Datum konání akce

29. 8. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000404126100058