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21 January 2022
 
  » arxiv » hep-ph/0506133

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Sector of the $2^{++}$ mesons: observation of the tensor glueball
V.V. Anisovich ; M.A. Matveev ; J. Nyiri ; A.V. Sarantsev ;
Date 14 Jun 2005
Subject hep-ph
AbstractData of the Crystal Barrel and L3 collaborations clarified essentially the situation in the $2^{++}$ sector in the mass region up to 2400 MeV, demonstrating the linearity of $(n,M^2)$ trajectories, where $n$ is the radial quantum number of a quark-antiquark state with mass $M$. We discuss these data and show that there exists a superfluous state for the $(n,M^2)$ trajectories: a broad resonance $f_2(2000)$. We pay special attention to the reactions $par p opipi,etaeta,etaeta’$ in the mass region 1990--2400 MeV where, together with $f_2(2000)$, four relatively narrow resonances are seen: $f_2(1920)$, $f_2(2020)$, $f_2(2240)$, $f_2(2300)$. We analyse the branching ratios of all these resonances and show that only the decay couplings of the broad state $f_2(2000) opi^0pi^0,etaeta, etaeta’$ satisfy relations inherent in the glueball decay.
Source arXiv, hep-ph/0506133
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