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• W2059484401 abstract "Recently experimentalists have discovered several charged charmoniumlike hadrons ${Z}_{c}^{+}$ with unconventional quark content $overline{c}coverline{d}u$. We perform a search for ${Z}_{c}^{+}$ with mass below 4.2 GeV in the channel ${I}^{G}({J}^{PC})={1}^{+}({1}^{+ensuremath{-}})$ using lattice QCD. The major challenge is presented by the two-meson states $J/ensuremath{psi}ensuremath{pi}$, ${ensuremath{psi}}_{2S}ensuremath{pi}$, ${ensuremath{psi}}_{1D}ensuremath{pi}$, $D{overline{D}}^{*}$, ${D}^{*}{overline{D}}^{*}$, ${ensuremath{eta}}_{c}ensuremath{rho}$ that are inevitably present in this channel. The spectrum of eigenstates is extracted using a number of meson-meson and diquark-antidiquark interpolating fields. For our pion mass of 266 MeV we find all the expected two-meson states but no additional candidate for ${Z}_{c}^{+}$ below 4.2 GeV. Possible reasons for not seeing an additional eigenstate related to ${Z}_{c}^{+}$ are discussed. We also illustrate how a simulation incorporating interpolators with a structure resembling low-lying two-meson states seems to render a ${Z}_{c}^{+}$ candidate, which is however not robust after further two-meson states around 4.2 GeV are implemented." @default.
• W2059484401 created "2016-06-24" @default.
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• W2059484401 date "2015-01-15" @default.
• W2059484401 modified "2023-10-10" @default.
• W2059484401 title "Study of the<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:msubsup><mml:mi>Z</mml:mi><mml:mi>c</mml:mi><mml:mo>+</mml:mo></mml:msubsup></mml:math>channel using lattice QCD" @default.
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• W2059484401 doi "https://doi.org/10.1103/physrevd.91.014504" @default.
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