Pseudoscalar meson and vector meson interactions and dynamically generated axial-vector mesons

Abstract

The axial-vector mesons a 1 (1260), b 1 (1235), f 1 (1285), h 1 (1170), h 1 (1380), and K 1 (1270) are dynamically generated in the unitized chiral perturbation theory. Such a picture has been tested extensively in the past few years. In this work, we calculate the interaction kernel up to O(p 2 ) and study the impact on the dynamically generated axial-vector states. In anticipation of future lattice QCD simulations, we calculate the scattering lengths and the pole positions as functions of the pion mass, with the light-quark mass dependence of the kaon, the eta, and the vector mesons determined by the n f = 2 + 1 lattice QCD simulations of the PACS-CS Collaboration.

$$B_s\pi $$ B s π – $$B\bar{K}$$ B K ¯ interactions in finite volume and X(5568)

“…In fact, similar effects have already been observed in Ref. [41]. On the other hand, as m π increases, a BK stays more or less constant in XUChPT [32], while it increases slightly in / X -UChPT [28].…”

S-waveKK*interactions in a finite volume and thefGeng1, Ren2, Zhou3 et al. 2015Phys. Rev. DSelf Cite292330View full textAdd to dashboardCite

“…In recent years, however, it has been suggested to be a dynamically generated state made from the KK * interaction, together with its axial-vector counterparts [2,3]. Such a picture has been extensively tested in the past decade [4][5][6][7][8][9][10][11][12][13][14]. All these studies yield consistent results that the ground-state axial-vector mesons can be understood as dynamically generated states or at least contain large pseudoscalar meson-vector meson components.…”

Anomalous enhancement of the isospin-violating Λ(1405) production by a triangle singularity in Λc→

“…The a 1 ð1260Þ and the f 0 ð980Þ have sizable couplings to the KK Ã þ c:c: and the KK channels, respectively, because they are dynamically generated through the coupled-channel effect of hadrons as studied in Refs. [8][9][10] and [11][12][13][14][15][16][17] for the a 1 ð1260Þ and the f 0 ð980Þ, respectively. Actually, the large coupling of the internal particles and the final-state hadron is crucial to have a prominent peak of the TS.…”