Abstract:

We compute masses of the two lightest glueballs from spectral reconstructions of timelike interaction channels of the four-gluon vertex in Landau gauge Yang-Mills theory. The Euclidean spacelike dressings of the vertex are calculated with the functional renormalization group. For the spectral reconstruction of these Euclidean data, we employ Gaussian process regression. The glueball resonances can be identified straightforwardly and we obtain 𝑚𝑠⁢𝑐=1870⁢(75)  MeV as well as 𝑚𝑝⁢𝑠=2700⁢(120)  MeV, in accordance with functional bound state and lattice calculations.

J. M. Pawlowski, C. S. Schneider, J. Turnwald, J. M. Urban, N. Wink, „Yang-Mills glueball
masses from spectral reconstruction“, Phys. Rev. D 108, 076018 (2023).

https://journals.aps.org/prd/abstract/10.1103/PhysRevD.108.076018

Related to Project A02, C06