Conveners
Parallel Session I
- Alexey Nefediev (Lebedev Physical Institute)
Dr
Jorgivan Morais Dias
(Institute of Physics, University of São Paulo, Brazil)
23/05/2018, 14:30
In this work, we have studied the $B_c^-\to \pi^- J/\psi\omega$ and $B_c^-\to \pi^- D^{*}\bar{D}^{*}$ reactions. In particular, we have shown they are related by the presence of two resonances: the $X(3940)$ and $X(3930)$, which are of molecular nature and couple mostly to $D^{*}\bar{D}^{*}$, but also to $J/\psi\omega$. Because of that, in the $J/\psi\omega$ mass distribution we find a cusp...
Dr
Kirill Chilikin
(LPI RAS)
23/05/2018, 14:47
A review of charmoniumlike state studies by means of amplitude
analyses at Belle is presented, including the analyses of
$\bar{B}^0 \rightarrow \psi(2S) \pi^+ K^-$,
$\bar{B}^0 \rightarrow J/\psi \pi^+ K^-$. The analysis of
$e^+ e^- \to J/\psi D \bar{D}$ is discussed in more detail.
Prospects of similar analyses at Belle II are mentioned.
Ms
Valentina Zhukova
(LPI)
23/05/2018, 15:04
New results are obtained for the exclusive cross sections of the $e^+e^-$ annihilation into charmed hadron pairs with initial state radiation. The analysis is based on the data sample collected with the Belle detector with the integrated luminosity of 951 fb${}^{-1}$. The accuracy of the cross section measurement is increased by a factor of 2 compared with the previous Belle study and, for the...
Dr
Timofey Uglov
(LPI RAS)
23/05/2018, 15:21
Data on 7 open-charm channels collected by the Belle Collaboration are analyzed simultaneously using a unitary approach based on a coupled-channel model in a wide energy range $\sqrt{s}=$3.7-4.7~GeV. The resulting fit provides a remarkably
good overall description of the line shapes in all studied
channels. Parameters of 5 vector charmonium resonances are extracted
from the fit.
It is...
Dr
Vadim Baru
(HISKP, Bonn University)
23/05/2018, 15:38
The experimental line shapes available in the $B\bar{B^{\ast}}$, $B^{*}\bar{B^{\ast}}$, $h_b(1P)\pi$ and $h_b(2P)\pi$ channels are analysed using a theoretical EFT-based framework manifestly consistent with unitarity and analyticity. The line shapes are calculated using a system of coupled channel integral equations with the potential consisting of the one-pion and one-eta meson exchange...
Dr
Mikhail Mikhasenko
(HISKP, Universität Bonn)
23/05/2018, 16:12
The discrepancy between different determinations of mass and width of the ground axial-vector state $a_1(1260)$ is a long-standing issue.
Measurements include the resonance production in hadronic processes, i.e. central production, antiproton-proton annihilation, and diffraction experiments, with COMPASS providing the most accurate determination of Breit-Wigner parameters so far.
On the...
