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| Paper IPM / Physic / 15023 |
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| Abstract: | |||||||
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Theoretical investigations of the pentaquark states which were recently discovered
provide important information on their nature and structure. It
is necessary to study the spectroscopic parameters like masses and residues of particles belong to the class of
pentaquarks and ones having similar structures. The mass and pole residue are quantities
which emerge as the main input parameters in exploration of the electromagnetic,
strong and weak interactions of the pentaquarks with other hadrons in many frameworks. This work deals with a QCD
sum rule analysis of the spin-3/2 and spin-5/2 bottom pentaquarks with both positive and
negative parities aiming to evaluate their masses and residues. In calculations, the pentaquark
states are modeled by molecular-type interpolating currents: for particles with J=5/2 a
mixing current is used. We compare the results obtained in this work with the existing predictions of
other theoretical studies. The predictions on the masses may shed light on experimental searches of the bottom pentaquarks.
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