2014/10/29 by Axel Maas, Tajdar Mufti · 1 voice
Physics and Astronomy · #hep-lat
published as PoS(LATTICE2014)060 · 7 pages, 2 figures, talk given at the "XXXII International Symposium on Lattice Field Theory", New York, June 2014. Submitted to the proceedings
Yang-Mills-Higgs theory is quite a remarkable theory in that it shows very different behaviors without phase transitions. It is dominated by the Brout-Englert-Higgs mechanism in some domain of the phase diagram, while it is essentially QCD-like in another. It is expected that albeit there is no qualitative difference, there are substantially quantitative differences throughout the spectrum. This is investigated using lattice theory for the case of the scalar singlet channel for more than a hundred different points in the phase diagram. It is found that the results deviate partly substantially from the expectations in some cases, but in others justify the picture of a weakly interacting theory - even in cases of rather strong interactions at the ultraviolet cutoff.