Journal article

Publication year: 2020

Journal: The European Physical Journal C

Volume number: 80

Issue number: 11

ISSN: 1434-6044

eISSN: 1434-6052

Open access status: Gold

DOI Link: https://doi.org/10.1140/epjc/s10052-020-08649-6

Publisher: SpringerOpen

Abstract: 
We provide results for the spectrum of scalar and pseudoscalar glueballs in pure Yang-Mills theory using a parameter-free fully self-contained truncation of DysonSchwinger and Bethe-Salpeter equations. The only input, the scale, is fixed by comparison with lattice calculations. We obtain ground state masses of 1.9GeV and 2.6GeV for the scalar and pseudoscalar glueballs, respectively, and 2.6GeV and 3.9GeV for the corresponding first excited states. This is in very good quantitative agreement with available lattice results. Furthermore, we predict masses for the second excited states at 3.7GeV and 4.3GeV. The quality of the results hinges crucially on the self-consistency of the employed input. The masses are independent of a specific choice for the infrared behavior of the ghost propagator providing further evidence that this only reflects a nonperturbative gauge completion.

Harvard Citation style: Huber, M., Fischer, C. and Sanchis-Alepuz, H. (2020) Spectrum of scalar and pseudoscalar glueballs from functional methods, The European Physical Journal C, 80(11), Article 1077. https://doi.org/10.1140/epjc/s10052-020-08649-6

APA Citation style: Huber, M., Fischer, C., & Sanchis-Alepuz, H. (2020). Spectrum of scalar and pseudoscalar glueballs from functional methods. The European Physical Journal C. 80(11), Article 1077. https://doi.org/10.1140/epjc/s10052-020-08649-6