Quintessence from shape moduli
Quintessence from shape moduli
复制标题
形状模量的精髓
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
E. Poppitz
中科院分区：
文献类型：
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作者：
M. Peloso;E. Poppitz
我们表明，形状模量在亚毫米额外的维度的情况下，解决规范层次问题，可以主导今天的宇宙的能量密度。在我们的方案中，额外维度的体积稳定在足够高的尺度上，以避免与核合成和太阳系精密引力实验发生冲突，而形状模量仍然很轻，但与膜定域物质的耦合非常弱，很容易避开这些边界。在大量的额外维度的非局部效应产生的形状模量的潜力。这种势具有正确的形式和数量级来解释当今的宇宙加速，在某种程度上类似于伪南武-戈德斯通玻色子的精髓模型。
We show that shape moduli in sub-millimeter extra dimensional scenarios, addressing the gauge hierarchy problem, can dominate the energy density of the universe today. In our scenario, the volume of the extra dimensions is stabilized at a sufficiently high scale to avoid conflicts with nucleosynthesis and solar-system precision gravity experiments, while the shape moduli remain light but couple extremely weakly to brane-localized matter and easily avoid these bounds. Nonlocal effects in the bulk of the extra dimension generate a potential for the shape moduli. The potential has the right form and order of magnitude to account for the present day cosmic acceleration, in a way analogous to models of quintessence as a pseudo Nambu-Goldstone boson.