Isotopic Symmetry Breaking in the η(1405) → f0(980)π0 → π+π–π0. Decay through a KK¯ Loop Diagram and the Role of Anomalous Landau Thresholds $$K\bar K$$ K K ¯ Loop Diagram and the Role of Anomalous Landau Thresholds

Isotopic Symmetry Breaking in the η(1405) → f0(980)π0 → π+π–π0. Decay through a KK¯ Loop Diagram and the Role of Anomalous Landau Thresholds $$K\bar K$$ K K ¯ Loop Diagram and the Role of Anomalous Landau Thresholds Full article

Journal

JETP Letters
ISSN: 0021-3640 , E-ISSN: 1090-6487

Output data

Year: 2018, Volume: 107, Number: 5, Pages: 276-281 Pages count : 6 DOI: 10.1134/s0021364018050053

Authors

Achasov N.N. ¹ , Shestakov G.N. ¹

Affiliations

1	Sobolev Institute of Mathematics

Anomalous isotopic symmetry breaking in the η(1405) → f0(980)π0 → π+π–π0 decay through a mechanism featuring anomalous Landau thresholds in the form of logarithmic triangle singularities, i.e., through the η(1405)→(K∗K¯+K¯∗K)→(K+K−+K0K¯0)π0→f0(980)π0→π+π−π0 transition, has been analyzed. It has been shown that this effect can be correctly quantified only by taking into account the nonzero K* width. Different scales of isotopic symmetry breaking associated with the K+–K0 mass difference are compared.

Achasov N.N. , Shestakov G.N.
Isotopic Symmetry Breaking in the η(1405) → f0(980)π0 → π+π–π0. Decay through a KK¯ Loop Diagram and the Role of Anomalous Landau Thresholds $$K\bar K$$ K K ¯ Loop Diagram and the Role of Anomalous Landau Thresholds
JETP Letters. 2018. V.107. N5. P.276-281. DOI: 10.1134/s0021364018050053 WOS Scopus OpenAlex

Ачасов Н.Н. , Шестаков Г.Н.
K ̄K-петлевой механизм нарушения изотопической симметрии в распаде η(1405) → f0(980)π0 → π+π−π0. Роль аномальных порогов Ландау
Письма в Журнал Экспериментальной и Теоретической Физики. 2018. Т.107. №5. С.292 - 297. DOI: 10.7868/S0370274X1805002

Web of science:	WOS:000433041800002
Scopus:	2-s2.0-85047453820
OpenAlex:	W3124747357

DB	Citing
Scopus	10
OpenAlex	11
Web of science	7