Using $K^0\pi^-\to\pi^-$ transitions to compute $K\to(\pi\pi)_{I=0}$ decay amplitudes at NLO in the chiral expansion

Autor:	Kim, Changhoan, Sachrajda, Christopher
Rok vydání:	2007
Předmět:	High Energy Physics - Lattice
Zdroj:	PoS LAT2007:357,2007
Druh dokumentu:	Working Paper
Popis:	It is proposed to compute matrix elements for the (unphysical) $K^0\pi^-\to \pi^-$ transition to determine the next-to-leading order low energy constants of the weak chiral Lagrangian. This allows us to evaluate $K\to(\pi\pi)_{I=0}$ decay amplitudes at this level of precision. This approach has several significant advantages over the use of $K\to\pi\pi$ transitions, most notably the elimination of s-channel disconnected diagrams and the use of fewer inversions. Comment: Lattice 2007, Regensburg
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0710.2519 Zobrazit plný text záznamu View this record from Arxiv