RT Journal Article
T1 φ →π⁺π⁻ decay within a chiral unitary approach
A1 Oller, J. A.
A1 Oset, E.
A1 Peláez Sagredo, José Ramón
AB Starting from the chiral perturbation theory Lagrangian, but keeping different masses for the charged and neutral mesons (m_u ≠ m_d), and using a previously developed nonperturbative unitary scheme that generates the lightest meson-meson resonances, we construct KK̅→KK̅ and KK̅→π⁺π⁻ in the vector channel. This allows us to obtain the kaon-loop contribution to φ-ρ mixing and study the φ→π⁺π⁻  decay. The dominant contribution to this decay comes from the φ→ϒ→π⁺π⁻ process. However, there can be large interferences with the subdominant contributions coming from φ-ρ and φ-ω mixing, or of these two contributions among themselves. As a consequence, a reliable measurement of φ→π⁺π⁻  decay could be used to differentiate between some φ-ω mixing scenarios proposed in the literature.
PB Amer Physical Soc
SN 1550-7998
YR 2000
FD 2000-10-01
LK https://hdl.handle.net/20.500.14352/59871
UL https://hdl.handle.net/20.500.14352/59871
LA eng
NO ©2000 The American Physical Society.We would like to thank T. Barnes, A. Bramon, R. Escribano, and Ulf-G. Meissner for discussions and useful information. J.A.O. would like to acknowledge partial financialsupport from the Generalitat Valenciana. J.R.P. thanks the Departamento de Física Teórica and IFIC at the University of Valencia-CSIC for their warm hospitality. We would also like to acknowledge the financial support from the DGICYT under Contracts No. PB96-0753, AEN97-1693, and PB98-0782 and from the EU TMR network Eurodaphne, Contract No. ERBFMRX-CT98-0169.
NO DGICYT
NO EU TMR network Eurodaphne
NO Generalitat Valenciana
DS Docta Complutense
RD 8 abr 2025