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Title: Reanalysis of lattice QCD spectra leading to the $D_{s0}^*(2317)$ and $D_{s1}^*(2460)$
Author: Martínez Torres, A.
Turbany Oset, Jaume
Prelovsek, S.
Ramos Gómez, Àngels
Keywords: Cromodinàmica quàntica
Partícules (Física nuclear)
Quantum chromodynamics
Particles (Nuclear physics)
Issue Date: 29-May-2015
Publisher: Springer Verlag
Abstract: We perform a reanalysis of the energy levels obtained in a recent lattice QCD simulation, from where the existence of bound states of KD and KD ∗ are induced and identified with the narrow D s0 ∗ (2317) and D s1 ∗ (2460) resonances. The reanalysis is done in terms of an auxiliary potential, employing a single-channel basis KD(∗), and a two-channel basis KD(∗), ηD s (∗) . By means of an extended Lüscher method we determine poles of the continuum t-matrix, bound by about 40 MeV with respect to the KD and KD ∗ thresholds, which we identify with the D s0 ∗ (2317) and D s1 ∗ (2460) resonances. Using a sum rule that reformulates Weinberg compositeness condition we can determine that the state D s0 ∗ (2317) contains a KD component in an amount of about 70%, while the state D s1 ∗ (2460) contains a similar amount of KD ∗. We argue that the present lattice simulation results do not still allow us to determine which are the missing channels in the bound state wave functions and we discuss the necessary information that can lead to answer this question.
Note: Reproducció del document publicat a:
It is part of: Journal of High Energy Physics, 2015, num. 153
ISSN: 1126-6708
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)
Publicacions de projectes de recerca finançats per la UE

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