Exotic Four Quark Matter: $Z_1(4475)$

Abstract

Motivated by the LHCb's recent confirmation of $Z_1(4475)$ as the $J^P=1^{+}$ resonance, we investigate various exotic interpretations of $Z_1(4475)$, which may be an axial vector tetraquark state, the P-wave excitation of the S-wave $D_1{\bar{D}}^{\ast }$ or $D_2{\bar{D}}^{\ast }$ molecule, the S-wave molecule composed of a $D$ or $D^{\ast }$ meson and a D-wave vector $D$ meson, or the cousin molecular state of $Z_c(3900)$ and $Z_c(4020)$ composed of a $D$ or $D^{\ast }$ meson and their radial excitations. With the help of the heavy quark symmetry, we predict the typical radiative and hidden-charm and open-charm strong decay patterns of $Z_1(4475)$, which are crucial to further identify the molecular state assignment of $Z_1(4475)$.

4 Pages, 1 Table. Minor modification added. Accepted by Phys. Rev. D

References in corpus (9)

• Observation of a resonance-like structure in the pi^+- psi' mass distribution in exclusive B-->K pi^+- psi' decays
• Observation of the resonant character of the $Z(4430{)}^{-}$ state
• Observation of new resonances decaying to $D\pi$ and $D^{\ast }\pi$ in inclusive $e^{+}{e}^{-}$ collisions near $\sqrt{s}=$10.58 GeV
• The Vector and Axial-Vector Charmonium-like States
• Is Z^+(4430) a loosely bound molecular state?
• $Z^{+}(4430)$ as a $D_1^{\prime }{D}^{\ast }$ ($D_1{D}^{\ast }$) molecular state
• QCD sum rules study of the meson Z^+(4430)
• Newly observed D(2550), D(2610), and D(2760) as 2S and 1D charmed mesons
• The two-body open charm decays of $Z^{+}(4430)$

Cited by in corpus (4)

• Hidden-Charm Tetraquarks and Charged Zc States
• Strong decays of the $XYZ$ states
• Resolving the puzzling decay patterns of charged $Z_c$ and $Z_b$ states
• Molecular Interpretation of the Supercharmonium State Z(4475)