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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 | | Abstract: | Data 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 | | Services: | Forum | Review | PDF | Favorites | |
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