MESON2023

Session

Parallel session A2

HF2

22 Jun 2023, 16:50

Medium lecture hall (A) (Auditorium Maximum)

Conveners

Parallel session A2: Heavy Flavours 2

• Vadim Baru (Ruhr University Bochum)

138. Molecular-type pentaquarks from coupled channel dynamics with strangeness S=-2

Volodymyr Magas (University of Barcelona)

22/06/2023, 16:50

Invited parallel

The existence of the nucleonic pentaquark resonances $P_c(4312)$, $P_c(4380)$, $P_c(4440)$ and $P_c(4457)$, established by the LHCb collaboration, has been one of the major discoveries in hadron physics in the latest years. This has been followed by the discovery of pentaquarks with one unit of strangeness, $P_{cs}(4338)$ and $P_{cs}(4457)$. Most of these states can be understood as hadronic...

103. Properties of the Tcc(3875) and its heavy-quark spin partner in nuclear matter

Víctor Montesinos Llácer (IFIC)

22/06/2023, 17:15

Parallel

We discuss the modification of the properties of the tetraquark-like $T_{cc}^+(3875)$ in dense nuclear matter. We consider the $T_{cc}^+$ in vacuum as a purely molecular isoscalar ($D^0D^{*+}/D^+D^{*0}$) bound state in $S-$wave, generated from a heavy-quark symmetry leading-order interaction between the charmed mesons. We compute the $D$ and $D^*$ spectral functions embeded in a nuclear...

181. The $T_{c\bar{s}}(2900)$ as a threshold effect from the interaction of the $D^*K^*$, $D^*_s\rho$ channels

Raquel Molina Peralta (IFIC)

22/06/2023, 17:35

Parallel

We look at the mass distribution of the $D_s^+ \pi^-$ in the $B^0 \to \bar{D}^0 D_s^+ \pi^-$ decay, where a peak has been observed in the region of the $D^*_s \rho$, $D^* K^*$ thresholds. By creating these two channels together with a $\bar{D}^0$ in $B^0$ decay and letting them interact as coupled channels, we obtain a structure around their thresholds, short of producing a bound state, which...

141. The $Y(4230)$ as a $D_1 D$ molecule

Leon von Detten (Forschungszentrum Jülich)

22/06/2023, 17:55

Parallel

We investigate the nature of the $Y(4230)$ in a simultaneous fit of the $DD^*\pi, J/\psi \pi \pi$ and $h_c \pi \pi$ crosssections and invariant mass spectra of the subsystems. We show to what extend a single $D_1 D$ bound state can explain the non-trivial asymmetric lineshape observed in these channels. At the same time we study if the $Z_c(3900)$ observed in the $J/\psi \pi$ invariant mass...

98. Observation of e+e- to chi_c1 at BESIII

Max Lellmann (Johannes Gutenberg University Mainz)

22/06/2023, 18:15

Parallel

In electron-positron annihilation, the process of $e^+e^- \to \chi_{c1}$ can occur via the production of two virtual photons or through neutral current, therefore being suppressed with respect to the normal annihilation process via one virtual photon. Using a dedicated scan sample around the $\chi_{c1}$ mass, the direct production of $\chi_{c1}$ has been established for the first time in...