Cusps in K→3π decays

被引：115

作者：

Colangelo, G.

Gasser, J.

Kubis, B.

Rusetsky, A.

机构：

[1] Univ Bonn, Helmholtz Inst Strahlen & Kernphys, D-53115 Bonn, Germany

[2] Univ Bern, Inst Theoret Phys, CH-3012 Bern, Switzerland

来源：

PHYSICS LETTERS B | 2006年 / 638卷 / 2-3期

关键词：

chiral symmetries; analytic properties of the S-matrix; decays of K-mesons; meson-meson interactions;

D O I：

10.1016/j.physletb.2006.05.017

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The pion mass difference generates a pronounced cusp in K -> 3 pi decays. As has recently been pointed out by Cabibbo and Isidori, an accurate measurement of the cusp may allow one to pin down the S-wave pi pi scattering lengths to high precision. Here, we present and illustrate an effective field theory framework that allows one to determine the structure of this cusp in a straightforward manner. The strictures imposed by analyticity and unitarity are respected automatically. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：187 / 194

页数：8

共 34 条

[31]

MEISSNER UG, NUCLTH0512035

[32] High statistics measurement of Ke4 decay properties -: art. no. 072004 [J].

Pislak, S ;

Appel, R ;

Atoyan, GS ;

Bassalleck, B ;

Bergman, DR ;

Cheung, N ;

Dhawan, S ;

Do, H ;

Egger, J ;

Eilerts, S ;

Fischer, H ;

Herold, W ;

Issakov, VV ;

Kaspar, H ;

Kraus, DE ;

Lazarus, DM ;

Lichard, P ;

Lowe, J ;

Lozano, J ;

Ma, H ;

Majid, W ;

Poblaguev, AA ;

Rehak, P ;

Sher, A ;

Thompson, JA ;

Truöl, P ;

Zeller, ME .

PHYSICAL REVIEW D, 2003, 67 (07)

[33]

Schweizer J, 2004, EUR PHYS J C, V36, P483, DOI 10.1140/epjc/s2004-01959-1

[34] Decay widths and energy shifts of ππ and πK atoms [J].

Schweizer, J .

PHYSICS LETTERS B, 2004, 587 (1-2) :33-40

← 1 2 3 4 →