Is \(f_2(1950)\) the tensor glueball?

Glueballs remain an experimentally undiscovered expectation of QCD. Lattice QCD (As well as other theoretical approaches) predicts a spectrum of glueballs, with the tensor (\(J^{PC}=2^{++}\)) glueball being the second lightest, behind the scalar glueball. Here, using a chiral hadronic model, we comp...

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Bibliographic Details
Published in:arXiv.org 2023-04
Main Authors: Vereijken, Arthur, Jafarzade, Shahriyar, Piotrowska, Milena, Giacosa, Francesco
Format: Article
Language:English
Subjects:
Channels
Decay rate
Mathematical analysis
Particle decay
Quantum chromodynamics
Tensors
Vector mesons
Online Access:Get full text
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Summary:Glueballs remain an experimentally undiscovered expectation of QCD. Lattice QCD (As well as other theoretical approaches) predicts a spectrum of glueballs, with the tensor (\(J^{PC}=2^{++}\)) glueball being the second lightest, behind the scalar glueball. Here, using a chiral hadronic model, we compute decay ratios of the tensor glueball into various meson decay channels. We find the tensor glueball to primarily decay into two vector mesons, dominated by \(\rho \rho \) and \(K^*K^*\) channels. These results are compared to experimental data of decay rates of isoscalar tensor mesons. Based on this comparison, we make statements on the eligibility of these mesons as potential tensor glueball candidates: the resonance \(f_2(1950)\) turns out to be, at present, the best match as being predominantly a tensor glueball.
ISSN:2331-8422
DOI:10.48550/arxiv.2304.05225