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SUMMARY:Revealing the puzzle of the dynamical nature of two 𝑫_𝟎^∗ 
 states from an analysis of LQCD results
DTSTART;VALUE=DATE-TIME:20260903T153000Z
DTEND;VALUE=DATE-TIME:20260903T155500Z
DTSTAMP;VALUE=DATE-TIME:20260817T003412Z
UID:indico-contribution-31085@indico.ific.uv.es
DESCRIPTION:Speakers: Zejian Zhuang (University of Valencia)\nWe perform a
 n analysis of LQCD light - charmed (pseudoscalar) meson scattering data wi
 th UChPT for pion masses ranging from $m_\\pi\\simeq 230$~MeV till the SU(
 3) limit\, $m_\\pi\\simeq 700$~MeV. We find two poles in the non-strange i
 sospin $I=1/2$ sector that can be related to the experimental $D_0(2300)$ 
 resonance. At the physical pion mass\, the poles are located at $\\sqrt{s_
 0}=2094(7)(1)-i111(7)(13)$ MeV\, and $2463(60)(30)-i108(14)(12)$~MeV. Whil
 e the first pole\, named here $D_0^*(2100)$\, is always a resonance in $D\
 \pi$ within the $1\\sigma$ region\, the second pole can be a resonance or 
 virtual state close to the $D\\eta\, D_s\\bar{K}$ thresholds. For the firs
 t time\, the pion mass dependence on different chiral trajectories includi
 ng SU(3) LQCD data are investigated for these poles. We find that in the $
 m_s=m_{s\,\\mathrm{phy}}$ trajectory\, the $D_0^*(2100)$ resonance pole be
 haves similarly as the $\\sigma$ resonance in $\\pi\\pi$ scattering\, spli
 tting into two poles\, connected to the $\\bar{\\mathbf{3}}$ representatio
 n. Moreover\, we found that the higher pole related to the experimental $D
 _0^*(2300)$ can be related to the $\\mathbf{6}$ representation. We highlig
 ht that since this pole couples strongly to channels with hidden strangene
 ss\, it mass is fairly constant in the $\\mathrm{Tr}[M]=C$ trajectory\, wh
 at can be tested in future LQCD simulations. The compositeness of the $D_0
 ^*(2100)$ state at the SU(3) limit is evaluated. Finally\, other sectors a
 re also discussed.\n\nhttps://indico.ific.uv.es/event/8521/contributions/3
 1085/
LOCATION:Universe 1001-Primera-1-1-1 - Paterna. Seminario
URL:https://indico.ific.uv.es/event/8521/contributions/31085/
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