G. N. Shestakov

activity

19962025

η (1405) \to f_{0} (980) π^{0} \to 3 π

67 citations · 696 across the 53 of their papers we have counts for

collaborators

53 papers

hep-ph2025

Phenomenological description of the $D_{s 0}^{*} (2317) \to D_{s} π^{0}$ decay

N. N. Achasov, G. N. Shestakov

For coupled channels $D^{0} K^{+}$ , $D^{+} K^{0}$ , $D_{s}^{+} η$ , and $D_{s}^{+} π^{0}$ , the $S$ -wave scattering amplitudes are constructed taking into account the mixing of the isoscalar resonance $D^*…

hep-ph2024

Estimate of the $S$ -wave $D^{*} K$ scattering length in the isospin-0 channel from Belle and LHCb data

N. N. Achasov, G. N. Shestakov

It is shown that the Belle and LHCb data on the interference of the amplitudes of the $S$ and $D$ partial waves in the decays $D_{s 1} (2536)^{+} \to D^{*+} K_{S}^{0}$ and $D_{s1}(2536)^-\t…

hep-ph2024

Qualitative explanation of the data on the decays $D^{0} \to a_{0} (980)^{\pm} π^{\mp}$ and $D^{+} \to a_{0} (980)^{+ (0)} π^{0 (+)}$ in the four-quark model of the $a_{0} (980)$ resonance

N. N. Achasov, G. N. Shestakov

It is shown that the values of the ratios $B (D^{0} \to a_{0} (980)^{+} π^{-}) / B (D^{0} \to a_{0} (980)^{-} π^{+})$ and $\mathcal{B}(D^+\to a_0(980)^+π^0)/\mathcal{B} (D^+\to a_0(980…

hep-ph2024

Tentative estimates of $B (X (3872) \to π^{0} π^{0} χ_{c 1})$ and $B (X (3872) \to π^{+} π^{-} χ_{c 1})$

N. N. Achasov, G. N. Shestakov

The rates of the $X (3872) \to π^{0} π^{0} χ_{c 1}$ and $X (3872) \to π^{+} π^{-} χ_{c 1}$ decays are estimated in the model of the triangle loop diagrams with charmed $D^{*} D ˉ D$ and $\bar D^*D\bar…

hep-ph2024

Toward an estimate of the amplitude $X (3872) \to π^{0} χ_{c 1} (1 P)$

N. N. Achasov, G. N. Shestakov

The well-known model of the triangle diagrams with $D^{*} D ˉ D^{*}$ and $D ˉ^{*} D D ˉ^{*}$ mesons in the loops is compared with the modern data on the amplitude of the $X(3872)\toπ^…

hep-ph2023

Estimates of absolute branching fractions for the $f_{0} (1710)$ decays and radiative transitions $ψ (2 S) \to γ f_{0} (1710)$ and $Υ (1 S) \to γ f_{0} (1710)$

N. N. Achasov, G. N. Shestakov

Using the result of the VES Collaboration for $B r (J / ψ \to γ f_{0} (1710))$ , we estimate the absolute branching fractions for the $f_{0} (1710)$ decays into $π π$ , $K K ˉ$ , $η η$ , $ω ω$ , and…

Phenomenological description of the Ds0∗​(2317)→Ds​π0 decay

Estimate of the S-wave D∗K scattering length in the isospin-0 channel from Belle and LHCb data

Qualitative explanation of the data on the decays D0→a0​(980)±π∓ and D+→a0​(980)+(0)π0(+) in the four-quark model of the a0​(980) resonance

Tentative estimates of B(X(3872)→π0π0χc1​) and B(X(3872)→π+π−χc1​)

Toward an estimate of the amplitude X(3872)→π0χc1​(1P)

Estimates of absolute branching fractions for the f0​(1710) decays and radiative transitions ψ(2S)→γf0​(1710) and Υ(1S)→γf0​(1710)

Phenomenological description of the $D_{s 0}^{*} (2317) \to D_{s} π^{0}$ decay

Estimate of the $S$ -wave $D^{*} K$ scattering length in the isospin-0 channel from Belle and LHCb data

Qualitative explanation of the data on the decays $D^{0} \to a_{0} (980)^{\pm} π^{\mp}$ and $D^{+} \to a_{0} (980)^{+ (0)} π^{0 (+)}$ in the four-quark model of the $a_{0} (980)$ resonance

Tentative estimates of $B (X (3872) \to π^{0} π^{0} χ_{c 1})$ and $B (X (3872) \to π^{+} π^{-} χ_{c 1})$

Toward an estimate of the amplitude $X (3872) \to π^{0} χ_{c 1} (1 P)$

Estimates of absolute branching fractions for the $f_{0} (1710)$ decays and radiative transitions $ψ (2 S) \to γ f_{0} (1710)$ and $Υ (1 S) \to γ f_{0} (1710)$