The Scalar Meson f0(980) in Heavy-Meson Decays

Abstract

A phenomenological analysis of the scalar meson f0(980) is performed that relies on the quasi-two body decays D and Ds -> f0(980)P, with P=pi, K. The two-body branching ratios are deduced from experimental data on D or Ds -> pi pi pi, K Kbar pi and from the f0(980) -> pi+ pi- and f0(980) -> K+ K- branching fractions. Within a covariant quark model, the scalar form factors F0(q2) for the transitions D and Ds -> f0(980) are computed. The weak D decay amplitudes, in which these form factors enter, are obtained in the naive factorization approach assuming a quark-antiquark state for the scalar and pseudoscalar mesons. They allow to extract information on the f0(980) wave function in terms of u-ubar, d-dbar and s-sbar pairs as well as on the mixing angle between the strange and non-strange components. The weak transition form factors are modeled by the one-loop triangular diagram using two different relativistic approaches: covariant light-front dynamics and dispersion relations. We use the information found on the f0(980) structure to evaluate the scalar and vector form factors in the transitions D and Ds -> f0(980), as well as to make predictions for B and Bs -> f0(980), for the entire kinematically allowed momentum range of q2.

arXiv comment45 pages, 9 figures and 9 tables. The use of dispersion relations to calculate the weak transition form factors is better justified. A more extensive discussion on the strange and non-strange flavor content mixing is introduced. Results unchanged. Version to appear in Phys. Rev. D

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Cited by in corpus (39)

• Weak decays of heavy hadrons into dynamically generated resonances
• $B^0$ and $B_s^0$ decays into $J/\psi$ $f_0(980)$ and $J/\psi$ $f_0(500)$ and the nature of the scalar resonances
• $B_s\to f_0(980)$ form factors and $B_s$ decays into $f_0(980)$
• Use of B->J/ψf0 decays to discern the q anti-q or tetraquark nature of scalar mesons
• Study of the semileptonic decay Ds+ -> f0(980) e+ nu and implications for Bs -> J/psi f0
• Anatomy of $B_{s,d}^0\to J/\psi f_0(980)$
• Effective Lifetimes of $B_s$ Decays and their Constraints on the $B_s^0$-${\bar{B}}_s^0$ Mixing Parameters
• Exciting flavored bound states
• Charmed mesons with a symmetry-preserving contact interaction
• Strong D* -> D+pi and B* -> B+pi couplings
• Whether new data on $D_s\to f_0(980)e^{+}{\nu }_e$ can be understood if $f_0(980)$ consists of only the conventional $q\bar{q}$ structure
• Hadronic D decays involving even-parity light mesons
• $B_{(s)}\to S$ transitions in the light cone sum rules with the chiral current
• Is $Z_b(10610)$ a Molecular State?
• Flavor SU(4) breaking between effective couplings
• Semileptonic Decays of Charmed Mesons to Light Scalar Mesons
• ${\bar{B}}_s\to f_0(980)$ form factors and the width effect from light-cone sum rules
• Final state interactions in B+- to K+ K- K+- decays
• Dalitz plot studies of D0 --> K0S pi+ pi- decays in a factorization approach
• Scalar resonance effects on the B_s - \bar B_s mixing angle
• Kpi form factors and final state interactions in D+ --> K- pi+ pi+ decays
• Form factors of the B-S-transitions in the covariant quark model
• ${\bar{B}}^0$, $B^{-}$ and ${\bar{B}}_s^0$ decays into $J/\psi$ and $K\bar{K}$ or $\pi \eta$
• Flavourful hadronic physics
• Chiral Dynamics and S-wave contributions in Semileptonic $D_s/B_s$ decays into ${\pi }^{+}{\pi }^{-}$
• Hadronic three-body D decays mediated by scalar resonances
• Couplings between the $\rho$ and $D$- and $D^{\ast }$-mesons
• Semi-leptonic $D_s^{+}$(1968) decays as a scalar meson probe
• Pseudoscalar or vector meson production in non-leptonic decays of heavy hadrons
• Observation of $D^{+}\to K_S^0{a}_0(980{)}^{+}$ in the amplitude analysis of $D^{+}\to K_S^0{\pi }^{+}\eta$
• Dalitz-plot dependence of CP asymmetry in B+- --> K+- K+ K- decays
• Dalitz plot studies of $D^0\to K_S^0{K}^{+}{K}^{-}$ decays in a factorization approach
• Study of the $f_0(980)$ and $f_0(500)$ Scalar Mesons through the Decay $D_s^{+}\to {\pi }^{+}{\pi }^{-}{e}^{+}{\nu }_e$
• Determining the effective Wilson coefficient $a_2$ in terms of $BR(B_s\to {\eta }_c\varphi )$ and evaluating $BR(B_s\to {\eta }_c{f}_0(980))$
• Observation of $D^{+}\to f_0(500){\mu }^{+}{\nu }_{\mu }$ and study of $D^{+}\to {\pi }^{+}{\pi }^{-}{\ell }^{+}{\nu }_{\ell }$ decay dynamics
• The $D_s^{+}\to K^{+}{\pi }^{+}{\pi }^{-}$ reaction and the scalar $f_0(500)$, $f_0(980)$ and $K_0^{\ast }(700)$ resonances
• Testing the light scalar meson as a non-$q\bar{q}$ state in semileptonic $D$ decays
• New physics in B_s^0 -> J/ψϕdecays?
• Light-Front Model of Transition Form-Factors in Heavy Meson Decay