0000000000917954
AUTHOR
Mauro Napsuciale
showing 4 related works from this author
X(2175) as a resonant state of the phi K(K)overbar system
2008
We perform a Faddeev calculation for the three mesons system, ϕKK¯, taking the interaction between two pseudoscalar mesons and between a vector and a pseudoscalar meson from the chiral unitary approach which generates dynamically the low lying scalar mesons in the first case and the low lying axial vector mesons in the second. We obtain a neat resonance peak around a total mass of 2150 MeV and an invariant mass for the KK¯ system around 970 MeV, very close to the f0(980) mass. The state appears in I=0 and qualifies as a ϕf0(980) resonance. No state is seen in I=1. This finding provides a natural explanation for the recent state found at BABAR and BES, the X(2175), which decays into ϕf0(980).
X(2175)as a resonant state of theϕKK¯system
2008
We perform a Faddeev calculation for the three-meson system $\ensuremath{\phi}K\overline{K}$, taking the interaction between two pseudoscalar mesons and between a vector and a pseudoscalar meson from the chiral unitary approach. We obtain a neat resonance peak around a total mass of 2150 MeV and an invariant mass for the $K\overline{K}$ system around 970 MeV, very close to the ${f}_{0}(980)$ mass. The state appears in $I=0$ and qualifies as a $\ensuremath{\phi}{f}_{0}(980)$ resonance. We enlarge the space of states including $\ensuremath{\phi}\ensuremath{\pi}\ensuremath{\pi}$, since $\ensuremath{\pi}\ensuremath{\pi}$ and $K\overline{K}$ build up the ${f}_{0}(980)$, and find moderate changes…
Chiral unitary dynamics of hadrons and hadrons in a nuclear medium
2009
4th DAE-BRNS Workshop on Hadron Physics. Aligarh Muslim Univ, Dept Phys, Aligarh, INDIA, FEB 18-23, 2008
phi K+K- production in electron-positron annihilation
2009
In this work we study the e(+)e(-)->phi K+K- reaction. The leading order electromagnetic contributions to this process involve the gamma(*)phi K+K- vertex function with a highly virtual photon. We calculate this function at low energies using R chi PT supplemented with the anomalous term for the (VVP)-P-' interactions. Tree-level contributions involve the kaon form factors and the (KK)-K-* transition form factors. We improve this result, valid for low photon virtualities, replacing the lowest order terms in the kaon form factors and (KK)-K-* transition form factors by the form factors as obtained in U chi PT in the former case and the ones extracted from recent data on e(+)e(-)-> KK* in the…