Contact terms in γγ→π+π−π+π− transitions

Autor:	Carles Ayala, Albert Bramon, Fernando Cornet
Rok vydání:	1981
Předmět:	Physics Nuclear physics Nuclear and High Energy Physics Cross section (physics) Order (group theory) Invariant mass Gauge theory
Zdroj:	Physics Letters B. 107:235-237
ISSN:	0370-2693
DOI:	10.1016/0370-2693(81)90819-4
Popis:	The contribution of contact terms (originated by gauge invariance) to the γγ→ϱ0π+π− transition is evaluated. They are shown to play an essential role in order to explain the large cross section of γγ → π+π−π+π− and the π+π− invariant mass distributions recently observed at PETRA and SPEAR.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::00facdbe329a72d9231102823c0145f8 https://doi.org/10.1016/0370-2693(81)90819-4 Zobrazit plný text záznamu