All eight- and nine-dimensional string vacua from junctionsCvetič, Mirjam (Avtor) Dierigl, Markus (Avtor) Lin, Ling (Avtor) Zhang, Hao Y. (Avtor) 9D string vacua8D string vacuaanomaliesM-theoryNon-Abelian gauge theoriesquantum gravitystring dualitiesstrings & branessupergravityGauge symmetriesString and 5-brane junctions are shown to succinctly classify all known 8D N ¼ 1 string vacua. This requires an extension of the description for ordinary ½p; q-7-branes to consistently include O7þ planes, which then naturally encodes the dynamics of spn gauge algebras, including their p-form center symmetries. Central to this analysis are loop junctions, i.e., strings/5-branes which encircle stacks of 7-branes and O7þs. Loop junctions further signal the appearance of affine symmetries of emergent 9D descriptions at the 8D moduli space’s boundaries. Such limits reproduce all 9D string vacua, including the two disconnected rank (1,1) moduli components.APS20222023-09-22 15:06:26Znanstveno delo85978sl