标题： 慢引力子 显示英文标题

标题： The Slow Gravitino

摘要： 当超对称破缺 sector 是流体背景时，洛伦兹不变性被自发破缺。 超哈基机制导致具有洛伦兹对称性破缺项的引力子拉格朗日量。 我们分析由此产生的场方程和约束条件。 我们识别出物理的自旋 3/2 和自旋 1/2 手征态，推导出它们的运动方程并构建传播子。 洛伦兹对称性的破缺意味着纵模具有非相对论性的色散关系，其速度低于光速。 我们简要讨论了这种破缺可能对引力子宇宙学和现象学的影响。 显示英文摘要

摘要： When the supersymmetry breaking sector is a fluid background, Lorentz invariance is broken spontaneously. The super-Higgs mechanism leads to a gravitino Lagrangian with Lorentz symmetry violating terms. We analyse the resulting field equations and constraints. We identify the physical spin 3/2 and spin 1/2 helicity states, derive their equations of motion and construct the propagator. The violation of Lorentz symmetry implies that the longitudinal mode has a non-relativistic dispersion relation, whose speed is lower than the speed of light. We briefly comment on possible implications to gravitino cosmology and phenomenology.