One of the drivers for this seminar series is to get a glimpse of the many research questions, ideas, and results linked to the activities in our division. The seminars are intended to be very informal and we make plenty of room for questions and discussions.
Speaker: Juan Nieves, University of Valencia
Title of the lecture: “Towards a new paradigm for heavy-light meson spectroscopy”
Overview
- Date:Starts 26 September 2025, 13:15Ends 26 September 2025, 14:15
- Location:Von Bahr, Soliden
- Language:English
Abstract: Since 2003 many new hadrons have been observed that do not conform with quark-model expectations. We work in a framework combining chiral EFT and LQCD to demonstrate that various puzzles in the charm-meson spectrum find a natural resolution. In particular, we show that 𝐷*s0(2317) and the 𝐷s1(2460) become hadron molecular states, owing their existence to the nonperturbative dynamics of Goldstone-boson scattering off 𝐷(𝑠) and 𝐷*(𝑠) mesons. Most importantly the ordering of the lightest strange and nonstrange scalars becomes natural. We show that this mechanism is strongly supported by the high-quality data on the 𝐵− →𝐷+𝜋−𝜋− provided by the LHCb experiment. This supports a broader view where the hadron spectrum is viewed as more than a collection of quark-model states.
Contact
- Professor, Subatomic, High Energy and Plasma Physics, Physics