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

Towards nature of the Tcc(3875)+ state

Jun 8, 2023, 3:00 PM
DAD - Room 4H (Genova, Italy)

DAD - Room 4H

Genova, Italy

Invited Exotic hadrons and candidates Exotic hadrons and candidates


Vadim Baru (Bochum University)


The recent experimental observation of the first doubly charm exotic state Tcc(3875)+ by the LHCb collaboration has triggered the enormous interest in the community. Indeed, this state has very peculiar properties, since it is located just a few hundreds keV below the $D^0D^{*+}$ threshold and its width stems almost entirely from the only available strong decay channel $DD\pi$, as a consequence of the finite $D^*$ life time. This state has also been recently studied on lattice.

In this talk, we discuss our recent results for the Tcc from the EFT-based analysis of the experimental line shapes. Also, we argue that the left-hand-cut branch point generated by the one-pion exchange for the larger than physical pion masses sets an upper bound on the validity of the effective-range expansion, that has been used so far for extracting pertinent information on the Tcc from lattice. We therefore conclude that for an accurate extraction of the Tcc pole from lattice, the inclusion of the one-pion exchange is necessary.

Primary author

Vadim Baru (Bochum University)


Dr Menglin Du (School of Physics, University of Electronic Science and Technology of China) Arseniy Filin (Institut für Theoretische Physik II, Ruhr-Universität Bochum, D-44780 Bochum, Germany) Xiang-Kun Dong Evgeny Epelbaum Epelbaum (Ruhr-Universitaet Bochum) Feng-Kun Guo (Institute of Theoretical Physics, Chinese Academy of Sciences) Christoph Hanhart (IKP-TH, Forschungszentrum Juelich) Dr Alexey Nefediev (Institute Josef Stefan) Juan Nieves (IFIC (CSIC-UV)) Qian Wang

Presentation materials