Spectrum of SU(2) gauge theory at large number of flavors
| Autor: | Jarno Rantaharju, Tobias Rindlisbacher, Kari Rummukainen, Ahmed Salami, Kimmo Tuominen |
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| Přispěvatelé: | Helsinki Institute of Physics, Department of Physics, Mind and Matter, Particle Physics and Astrophysics, Teachers' Academy |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Lattice field theory
010308 nuclear & particles physics High Energy Physics::Lattice High Energy Physics - Lattice (hep-lat) High Energy Physics::Phenomenology FOS: Physical sciences 114 Physical sciences 01 natural sciences High Energy Physics - Lattice Extensions of fermion sector 0103 physical sciences Nonperturbative effects in field theory Renormalization group 010306 general physics |
| Zdroj: | Physical Review |
| Popis: | We present a numerical study of the spectrum of an asymptotically nonfree SU(2) gauge theory with Nf=24 massive fermion flavors. For such a large number of flavors, asymptotic freedom is lost and the massless theory is governed by a Gaussian fixed point at long distances. If fermions are massive they decouple at low energy scales and the theory is confining. We present a scaling law for the masses of the hadrons, glueballs and string tension as functions of fermion mass. The hadrons become effectively heavy quark systems, with masses approximately twice the fermion mass, whereas the energy scale of the confinement, probed by e.g., the string tension, is much smaller and vanishes asymptotically as mfermion2.18. Our results from lattice simulations are compatible with this behavior. |
| Databáze: | OpenAIRE |
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