Manifestations of the a00(980)−f0(980

Abstract

Manifestations of the

Direct CP violation in multi-body B decays with a00(980)<

“…is larger than that of ρ-ω mixing (jΠ ρω j≈0.0045GeV 2 [8]), that is to say, a 0 0 ð980Þ − f 0 ð980Þ mixing can increase CP violation much more than ρ-ω mixing. We also note that the phase of the mixing amplitude varies from 0 to π=2 when the invariant mass of π þ π − is near 980 MeV [6]. Thus, the CP-violating parameter has a narrow peak located around 980 MeV in the final π þ π − spectrum.…”

“…[4], this mixing mechanism was investigated phenomenologically. The amplitude of a 0 0 ð980Þ − f 0 ð980Þ mixing can be written as [4,6]…”

Study of the isospin breaking decay Y(2175)→ϕf0(980)Cheng1, Li2, Wang3 et al. 2019Phys. Rev. D8030View full textAdd to dashboardCite

“…[12]. Its mixing intensity has been studied extensively on its different aspects and possible manifestations in various processes [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30]. Recently, BESIII Collaboration has reported the first observation of f 0 (980) − a 0 0 (980) mixing in the decays of J/ψ → φf 0 (980) → φa 0 0 (980) → φηπ 0 and χ c1 → a 0 0 (980)π 0 → f 0 (980)π 0 → π + π − π 0 [31].…”