Journal article 960 views 212 downloads
Casimir scaling and Yang–Mills glueballs
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Maurizio Piai ,
Davide Vadacchino
Physics Letters B, Volume: 775, Pages: 89 - 93
Swansea University Authors:
Biagio Lucini , Maurizio Piai
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Open Access funded by SCOAP³ - Sponsoring Consortium for Open Access Publishing in Particle Physics. Under a Creative Commons license.
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DOI (Published version): 10.1016/j.physletb.2017.10.050
Abstract
We conjecture that in Yang-Mills theories the ratio between the ground-state glueball mass squared and the string tension is proportional to the ratio of the eigenvalues of quadratic Casimir operators in the adjoint and the fundamental representations. The proportionality constant de- pends on the d...
| Published in: | Physics Letters B |
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| Published: |
2017
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa36208 |
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| Abstract: |
We conjecture that in Yang-Mills theories the ratio between the ground-state glueball mass squared and the string tension is proportional to the ratio of the eigenvalues of quadratic Casimir operators in the adjoint and the fundamental representations. The proportionality constant de- pends on the dimension of the space-time only, and is henceforth universal. We argue that this universality, which is supported by available lattice results, is a direct consequence of area-law confinement. In order to explain this universal behaviour, we provide three analytical arguments, based respectively on a Bethe-Salpeter analysis, on the saturation of the scale anomaly by the lightest scalar glueball and on QCD sum rules, commenting on the underlying assumptions that they entail and on their physical implications. |
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| College: |
Faculty of Science and Engineering |
| Start Page: |
89 |
| End Page: |
93 |