Jun 5 – 9, 2023
Genova, Italy
Europe/Rome timezone

A new look at the $P_{cs}$ states from a molecular perspective.

Jun 5, 2023, 3:30 PM
DAD - Room 4H (Genova, Italy)

DAD - Room 4H

Genova, Italy

Contributed Exotic hadrons and candidates Exotic hadrons and candidates


Albert Feijoo (IFIC (CSIC-UV))


We have a look at the $P_{cs}$ states generated from the interaction of $\bar D^{(*)} \Xi^{(\prime*)}_c$ coupled channels.
We consider the blocks of pseudoscalar-baryon $({\frac12}^+, {\frac32}^+)$ and vector-baryon $({\frac12}^+, {\frac32}^+)$,
and find $10$ resonant states coupling mostly to $\bar D \Xi_c, \bar D^* \Xi_c,\bar D \Xi'_c, \bar D^* \Xi'_c,\bar D \Xi^*_c$ and
$\bar D^* \Xi^*_c$. A novel aspect of the work is the realization that the $\bar D \Xi_c,\bar D_s\Lambda_c$ or
$\bar D^* \Xi_c,\bar D^*_s\Lambda_c$ channels, with a strong transition potential, collaborate to produce a larger attraction
than the corresponding states $\bar D \Sigma_c,\bar D\Lambda_c$ or $\bar D^* \Sigma_c,\bar D^*\Lambda_c$ appearing in the
generation of the strangenessless $P_{c}$ states, since in the latter case the transition potential between those channels is zero. The extra attraction obtained in the $\bar D \Xi_c,\bar D^* \Xi_c$ pairs preclude the association of these channels to the $P_{cs}(4338)$
and $P_{cs}(4459)$ states respectively. Then we find a natural association of the $P_{cs}(4338)$ state coupling mostly to
$\bar D^* \Xi_c$ while the $P_{cs}(4459)$ is associated to the state found that couples mostly to $\bar D \Xi'_c$. Four more
states appear, like in other molecular pictures, and some of the states are degenerate in spin. Counting different spin states we
find $10$ states, which we hope can be observed in the near future.

Primary authors

Albert Feijoo (IFIC (CSIC-UV)) Bing-song Zou (Institute of High Energy Physics, Beijing) Chu Wen Xiao (School of Physics and Electronics, Central South University) Eulogio Oset (IFIC, CSIC University of valencia) Juan Nieves (IFIC (CSIC-UV)) Wen-Fei Wang (IFIC)

Presentation materials