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- W4297068548 abstract "Exotic resonant structures found in $Lambda^0_b$ and $overline{B}^0$ decays into charmonium in the LHCb experiment are discussed. Examination of the $J/psi p$ system in $Lambda^0_bto J/psi K^- p$ decays shows two states each of which must be composed of $uudcoverline{c}$ quarks, and thus are called charmonium pentaquarks. Their masses are $4380pm 8pm 29$~MeV and $4449.8pm 1.7pm 2.5$~MeV, and their corresponding widths ($Gamma$) are $205pm 18pm 86$ MeV, and $39pm 5pm 19$ MeV. The preferred $J^P$ assignments are of opposite parity, with one state having spin 3/2 and the other 5/2. Models of internal binding of the pentaquark states are discussed. Finally, another mesonic state is discussed, the $Z(4430)^-$ that decays into $psi' pi^-$ and was first observed by the Belle collaboration in $B^0to psi' K^+pi^-$ decays. Using a sample of approximately 25,000 signal events, LHCb determines the $J^{P}$ to be $1^{+}$." @default.
- W4297068548 created "2022-09-26" @default.
- W4297068548 creator A5061068837 @default.
- W4297068548 date "2015-09-14" @default.
- W4297068548 modified "2023-09-30" @default.
- W4297068548 title "Pentaquarks and Tetraquarks at LHCb" @default.
- W4297068548 doi "https://doi.org/10.48550/arxiv.1509.04051" @default.
- W4297068548 hasPublicationYear "2015" @default.
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