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arXiv 1303.3580hep-th
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超对称大质量引力

Supersymmetrizing Massive Gravity

Ola Malaeb

摘要:

当四个具有整体洛仑兹对称性的标量场与引力场耦合,并自发取破缺同态不变性的真空期望值时,引力子变得有质量。这个模型是超对称的考虑四个N=1手征超场与全球洛伦兹对称。当手征多重态z^A的标量分量达到真空期望值时,超同态不变性和局域超对称性都自发破缺。整体洛仑兹指数A与时空洛仑兹指数一致,使得标量场z^A成为矢量,手征旋量psi^A自旋为3/2拉丽塔-施温格场。利用张量演算将N=1的超引力拉氏量耦合到四个手征多重态的规则,将整体超对称性提升到局部超对称性。我们证明了该模型在破缺相时的谱由一个质量自旋为2的场、两个质量不同的质量自旋为3/2的场和一个质量矢量组成。

英文摘要:

When four scalar fields with global Lorentz symmetry are coupled to gravity and take a vacuum expectation value breaking diffeomorphism invariance spontaneously, the graviton becomes massive. This model is supersymmetrized by considering four N=1 chiral superfields with global Lorentz symmetry. When the scalar components of the chiral multiplets z^A acquire a vacuum expectation value, both diffeomorphism invariance and local supersymmetry are broken spontaneously. The global Lorentz index A becomes identified with the space-time Lorentz index making the scalar fields z^A vectors and the chiral spinors psi^A spin-3/2 Rarita-Schwinger fields. The global supersymmetry is promoted to a local one using the rules of tensor calculus of coupling the N=1 supergravity Lagrangian to the four chiral multiplets. We show that the spectrum of the model in the broken phase consists of a massive spin-2 field, two massive spin-3/2 fields with different mass and a massive vector.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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