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- W4312453410 abstract "We investigate the scattering of two scalar glueballs in pure YM theory, using the well known dilaton potential. We perform the calculations considering a glueball mass of about $m_G approx 1.7$ GeV, as predicted by lattice QCD. We begin with the tree-level theory, but the question about the presence of a bound state needs a deeper study to be answered. Thus we unitarize the theory through a self energy loop function consisting of a single subtraction at the single glueball resonance pole. We show that this choice is inconsistent as it leads to the emergence of a ghost-like state with negative norm. This problem is related with the sign of the coefficient in the first order term of the expansion of the reverse unitarized amplitude. We briefly discuss the solution which consists of an additional subtraction in the loop function, as presented in Eur.Phys.J.C 82 (2022) 5, 487." @default.
- W4312453410 created "2023-01-04" @default.
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- W4312453410 date "2022-01-01" @default.
- W4312453410 modified "2023-10-01" @default.
- W4312453410 title "Emergence of ghost in once-subtracted on-shell unitarization in glueball-glueball scattering" @default.
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- W4312453410 doi "https://doi.org/10.1051/epjconf/202227403005" @default.
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