论文标题
磁性压缩中的旋转凝结
Tachyon condensation in magnetic compactifications
论文作者
论文摘要
相交的D-Brane模型及其T型磁性压缩为粒子物理学提供了一个有吸引力的框架，从而可以进行手性费米子和超对称性破裂。一般而言，磁性压缩具有通常由威尔逊线去除的tachyon。但是，量子校正阻止了威尔逊线的局部最小值。因此，我们在最简单的情况下研究了旋转的凝结，即圆环上I型字符串理论的磁压缩到八个维度。我们发现旋转凝结恢复了超对称性，该超对称性被磁通量打破，我们计算了载体和超多种的质谱。量规组$ \ text {so}（32）$被打破到$ \ text {usp}（16）$。我们提出的论点是，Tachyon凝结所获得的真空对应于文献中已经知道的独特的8D超音理论，具有离散的$ b_ {ab} $背景，或者，在T二偶有版本中，IIb oberientifold type iib orientifold，带有三$ \ text {o} {o} {o} 7 _- $ \ - $ \ - $ \ - $ \ - $ \ - $ \ - $ \ $ \ - $ \ $} 7 r， $ \ text {o} 7 _+$ - 平面。旋转凝结后的基态是超对称性的，没有手性费仪。
Intersecting D-brane models and their T-dual magnetic compactifications provide an attractive framework for particle physics, allowing for chiral fermions and supersymmetry breaking. Generically, magnetic compactifications have tachyons that are usually removed by Wilson lines. However, quantum corrections prevent local minima for Wilson lines. We therefore study tachyon condensation in the simplest case, the magnetic compactification of type I string theory on a torus to eight dimensions. We find that tachyon condensation restores supersymmetry, which is broken by the magnetic flux, and we compute the mass spectrum of vector- and hypermultiplets. The gauge group $\text{SO}(32)$ is broken to $\text{USp}(16)$. We give arguments that the vacuum reached by tachyon condensation corresponds to the unique 8d superstring theory already known in the literature, with discrete $B_{ab}$ background or, in the T-dual version, the type IIB orientifold with three $\text{O}7_-$-planes, one $\text{O}7_+$-plane and eight D7-branes coincident with the $\text{O}7_+$-plane. The ground state after tachyon condensation is supersymmetric and has no chiral fermions.
