Zobrazeno 1 - 10
of 251
pro vyhledávání: '"Shestakov, G. N."'
Autor:
Achasov, N. N., Shestakov, G. N.
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 $D_{s1}(2536 )^+\to D^{*+}K^0_S$ and $D_{s1}(2536)^-\to\bar D^{*0}K^-$ allow us to obtain an estimate of the S-wave $D^*K$ scat
Externí odkaz:
http://arxiv.org/abs/2411.00377
Autor:
Achasov, N. N., Shestakov, G. N.
Publikováno v:
Phys. Rev. D 110, 016025 (2024)
It is shown that the values of the ratios $\mathcal{B}(D^0\to a_0(980)^+\pi^-)/\mathcal{B} (D^0\to a_0(980)^-\pi^+ )$ and $\mathcal{B}(D^+\to a_0(980)^+\pi^0)/\mathcal{B} (D^+\to a_0(980)^0 \pi^+)$, recently measured by the BESIII Collaboration, are
Externí odkaz:
http://arxiv.org/abs/2405.13332
Autor:
Achasov, N. N., Shestakov, G. N.
Publikováno v:
Phys. Rev. D 110, 016023 (2024)
The rates of the $X(3872)\to\pi^0\pi^0\chi_{c1}$ and $X(3872)\to \pi^+\pi^-\chi_{c1}$ decays are estimated in the model of the triangle loop diagrams with charmed $D^*\bar DD$ and $\bar D^*D\bar D$ mesons in the loops. There are the triangle logarith
Externí odkaz:
http://arxiv.org/abs/2405.09228
Autor:
Achasov, N. N., Shestakov, G. N.
Publikováno v:
Phys. Rev. D 109, 036028 (2024)
The well-known model of the triangle diagrams with $D^*\bar DD^*$ and $\bar D^*D\bar D^*$ mesons in the loops is compared with the modern data on the amplitude of the $X(3872)\to\pi^0\chi_{c1}(1P)$ decay. Considering the $X(3872)$ object as a $\chi_{
Externí odkaz:
http://arxiv.org/abs/2401.04948
Autor:
Achasov, N. N., Shestakov, G. N.
Publikováno v:
JETP Letters 118, 385 (2023)
Using the result of the VES Collaboration for $Br(J/\psi\to\gamma f_0(1710))$, we estimate the absolute branching fractions for the $f_0(1710)$ decays into $\pi\pi$, $K\bar K$, $\eta\eta$, $\omega\omega$, and $\omega\phi$. In addition, we estimate $B
Externí odkaz:
http://arxiv.org/abs/2307.03472
Autor:
Achasov, N. N., Shestakov, G. N.
Publikováno v:
Phys. Rev. D 108, 036018 (2023)
The current situation with the recently discovered $a_0(1700/1800)$ resonance is very paradoxical: it is believed that $a_0(1700/1800)$ must be strongly coupled with two vector mesons, but there is no direct experimental confirmation of this yet. Bas
Externí odkaz:
http://arxiv.org/abs/2306.04478
Autor:
Achasov, N. N., Shestakov, G. N.
Publikováno v:
Physical Review D 107, 056009 (2023)
We present a phenomenological description of the LHCb data for the magnitudes and phases of the $\pi^-\pi^+$ $S$-wave amplitudes in the $D^+\to\pi^-\pi^+\pi^+$ and $D^+_s\to\pi^-\pi^+\pi^+$ decays. We operate within a simple model that takes into acc
Externí odkaz:
http://arxiv.org/abs/2211.05526
Publikováno v:
Phys. Rev. D 106, 093012 (2022)
A brief review of the available experimental and theoretical results on the production of the $\chi_{Q1}$ states in $e^+e^-$ annihilation and photon-photon $\gamma\gamma^*$ interactions is presented. Future data on the production of the $\chi_{c1}(1P
Externí odkaz:
http://arxiv.org/abs/2208.00793
Autor:
Achasov, N. N., Shestakov, G. N.
Publikováno v:
Physical Review D 105, 096038 (2022)
The values of the masses of the particles involved in the decay of $T^+_{cc}\to D^{*+}D^0\to\pi^+D^0D^0$ suggest that due to the final state interactions in the transition vertex $T^+_{cc}\to D^{*+}D^0 $ there may be triangle logarithmic singularitie
Externí odkaz:
http://arxiv.org/abs/2203.17100
Autor:
Achasov, N. N., Shestakov, G. N.
Publikováno v:
Phys. Rev. D 104, 116026 (2021)
The radially excited pseudoscalar state $\eta(1295)$ is still poorly understood [as well as its $SU(3)$ partners $\pi(1300)$ and $K(1460 )$] and we want to attract attention experimenters to its comprehensive study. As for the main three-body decay $
Externí odkaz:
http://arxiv.org/abs/2110.05209