Lattice QCD on one ensemble yields electromagnetic form factors for T_bb, indicating a compact heavy diquark plus light antidiquark bound state with charge radius smaller than the BB* threshold.
Observation of $J/\psi\phi$ structures consistent with exotic states from amplitude analysis of $B^+\to J/\psi \phi K^+$ decays
3 Pith papers cite this work. Polarity classification is still indexing.
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abstract
The first full amplitude analysis of $B^+\to J/\psi \phi K^+$ with $J/\psi\to\mu^+\mu^-$, $\phi\to K^+K^-$ decays is performed with a data sample of 3 fb$^{-1}$ of $pp$ collision data collected at $\sqrt{s}=7$ and $8$ TeV with the LHCb detector. The data cannot be described by a model that contains only excited kaon states decaying into $\phi K^+$, and four $J/\psi\phi$ structures are observed, each with significance over $5$ standard deviations. The quantum numbers of these structures are determined with significance of at least $4$ standard deviations. The lightest has mass consistent with, but width much larger than, previous measurements of the claimed $X(4140)$ state.
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UNVERDICTED 3representative citing papers
LHCb summarizes high-precision quarkonia data from ultraperipheral collisions and new forward-rapidity measurements of ρ(770) and φ(1020) mesons compared to theoretical models.
An effective Lagrangian approach calibrated with one adjustable parameter from data reproduces cross sections for K3*(1780), K2(1820), K2(1770) and K4*(2045) and predicts sizable forward-peaked production for additional high-orbital kaons in K-p reactions.
citing papers explorer
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Electromagnetic form factors and structure of the $T_{bb}$ tetraquark from lattice QCD
Lattice QCD on one ensemble yields electromagnetic form factors for T_bb, indicating a compact heavy diquark plus light antidiquark bound state with charge radius smaller than the BB* threshold.
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Hard Probes in Ultraperipheral Collisions at LHCb
LHCb summarizes high-precision quarkonia data from ultraperipheral collisions and new forward-rapidity measurements of ρ(770) and φ(1020) mesons compared to theoretical models.
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Production of high-orbital kaon excited states in the $K^{-}p$ reaction
An effective Lagrangian approach calibrated with one adjustable parameter from data reproduces cross sections for K3*(1780), K2(1820), K2(1770) and K4*(2045) and predicts sizable forward-peaked production for additional high-orbital kaons in K-p reactions.