000086252 001__ 86252
000086252 005__ 20200716101603.0
000086252 0247_ $$2doi$$a10.1103/PhysRevD.100.074511
000086252 0248_ $$2sideral$$a114823
000086252 037__ $$aART-2019-114823
000086252 041__ $$aeng
000086252 100__ $$0(orcid)0000-0002-8215-1413$$aAzcoiti, Vicente$$uUniversidad de Zaragoza
000086252 245__ $$aInterplay between SU (Nf) chiral symmetry, U (1)A axial anomaly, and massless bosons
000086252 260__ $$c2019
000086252 5060_ $$aAccess copy available to the general public$$fUnrestricted
000086252 5203_ $$aThe standard wisdom on the origin of massless bosons in the spectrum of a quantum field theory (QFT) describing the interaction of gauge fields coupled to matter fields is based on two well-known features: gauge symmetry and spontaneous symmetry breaking of continuous global symmetries. However, we will show in this article how the topological properties, which originate the U(1)A axial anomaly in a QFT that describes the interaction of fermion matter fields and gauge bosons, are the basis of an alternative mechanism to generate massless bosons in the chiral limit, if the non-Abelian SU(Nf)A chiral symmetry is fulfilled in the vacuum. We will also test our predictions with the results of a well-known two-dimensional model, the two-flavor Schwinger model, which was analyzed by Coleman long ago, and will give a reliable answer to some of the questions he asked himself on the spectrum of the model in the strong-coupling (chiral) limit. We will also analyze what the expectations for the U(N) gauge-fermion model in two dimensions are and will discuss the impact of our results in the chirally symmetric high-temperature phase of QCD, which was present in the early Universe and is expected to be created in heavy-ion collision experiments. To keep mathematical rigor, we perform our calculations using a lattice regularization and Ginsparg-Wilson fermions.
000086252 536__ $$9info:eu-repo/grantAgreement/ES/MINECO/FPA2015-65745-P
000086252 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/
000086252 590__ $$a4.833$$b2019
000086252 591__ $$aPHYSICS, PARTICLES & FIELDS$$b6 / 29 = 0.207$$c2019$$dQ1$$eT1
000086252 591__ $$aASTRONOMY & ASTROPHYSICS$$b16 / 68 = 0.235$$c2019$$dQ1$$eT1
000086252 592__ $$a1.664$$b2019
000086252 593__ $$aPhysics and Astronomy (miscellaneous)$$c2019$$dQ1
000086252 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000086252 7102_ $$12004$$2405$$aUniversidad de Zaragoza$$bDpto. Física Teórica$$cÁrea Física Teórica
000086252 773__ $$g100, 7 (2019), 074511 1-14$$pPhys. rev. D$$tPhysical Review D$$x2470-0010
000086252 8564_ $$s230507$$uhttps://zaguan.unizar.es/record/86252/files/texto_completo.pdf$$yVersión publicada
000086252 8564_ $$s109217$$uhttps://zaguan.unizar.es/record/86252/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000086252 909CO $$ooai:zaguan.unizar.es:86252$$particulos$$pdriver
000086252 951__ $$a2020-07-16-09:53:51
000086252 980__ $$aARTICLE