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arXiv · hep-lat/0103015

Hybrid Quarkonia with Dynamical Sea Quarks

PACS Collaboration·T. Manke·A. Ali Khan·S. Aoki·R. Burkhalter·S. Ejiri·M. Fukugita·S. Hashimoto·N. Ishizuka·Y. Iwasaki·K. Kanaya·T. Kaneko·Y. Kuramashi·K. Nagai·M. Okawa·H. P. Shanahan·A. Ukawa·T. Yoshie
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Abstract

We present a dynamical lattice calculation with 2 flavours for bottomonium states with an additional gluonic excitation. Using improved actions for the quarks and gauge fields at a lattice spacing of $a \approx 0.1$ fm, we find 10.977(61)(62) GeV for the energy of the lowest lying $b\bar bg$-hybrid, where the first error is statistical and the second denotes the systematic uncertainty due to the determination of scale. In a parallel quenched simulation we demonstrate explicitly that vacuum polarisation effects are less than 10% of the splitting with the ground state.

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PACS Collaboration, T. Manke, A. Ali Khan, S. Aoki, R. Burkhalter, S. Ejiri, M. Fukugita, S. Hashimoto, N. Ishizuka, Y. Iwasaki, K. Kanaya, T. Kaneko, Y. Kuramashi, K. Nagai, M. Okawa, H. P. Shanahan, A. Ukawa, T. Yoshie. 2001-08-03. Hybrid Quarkonia with Dynamical Sea Quarks. https://doi.org/10.1103/physrevd.64.097505

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