How to understand the X(2900)?

In this work, the S - and P -wave D ¯ ∗ K ∗ interactions are studied in a coupled-channel formalism to understand the recently observed X 0 ( 2900 ) and X 1 ( 2900 ) at LHCb. The experimental event distributions can be well described, and two states with I ( J P ) = 0 ( 0 + ) and 0 ( 1 - ) are yield...

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Published inThe European physical journal. C, Particles and fields Vol. 82; no. 5; pp. 1 - 8
Main Authors Wang, Bo, Zhu, Shi-Lin
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 09.05.2022
Springer
Springer Nature B.V
SpringerOpen
Subjects
Astronomy
Astrophysics and Cosmology
Elementary Particles
Hadrons
Heavy Ions
Measurement Science and Instrumentation
Nuclear Energy
Nuclear Physics
P waves
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quarks
Regular Article - Theoretical Physics
String Theory
Wave excitation
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Summary:In this work, the S - and P -wave D ¯ ∗ K ∗ interactions are studied in a coupled-channel formalism to understand the recently observed X 0 ( 2900 ) and X 1 ( 2900 ) at LHCb. The experimental event distributions can be well described, and two states with I ( J P ) = 0 ( 0 + ) and 0 ( 1 - ) are yielded in a unified framework. The masses of the 0 + and 1 - states are consistent with the experimental data, but the width of the 0 + state is larger than that of the 1 - one. The X 1 ( 2900 ) can be interpreted as the P -wave excitation of the ground-state X 0 ( 2900 ) in the hadronic molecular picture. The S - and P -wave multiplets in the D ¯ ∗ K ∗ system have many members, so the present peak in the D - K + invariant mass distributions might contain multi substructures.
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ISSN:1434-6052
1434-6044
1434-6052
DOI:10.1140/epjc/s10052-022-10396-9