标题： 扭转场对大爆炸核合成的影响 显示英文标题

标题： Effects of a torsion field on Big Bang nucleosynthesis

摘要： 在本文中研究了在大多数量子引力理论中自然出现的扭力，是否对大爆炸核合成有可观测的影响。 扭力可能导致中微子之间的自旋翻转，从而将它们转化为惰性中微子。 在早期宇宙中，它们可以改变氦的丰度，而这一丰度受到观测的严格限制。 在这里，我计算了弦理论类型的扭力在多大程度上会导致与大爆炸核合成预测的不一致。 显示英文摘要

摘要： In this paper it is investigated whether torsion, which arises naturally in most theories of quantum gravity, has observable implications for the Big Bang nucleosynthesis. Torsion can lead to spin flips amongst neutrinos thus turning them into sterile neutrinos. In the early Universe they can alter the helium abundance which is tightly constrained by observations. Here I calculate to what extent torsion of the string theory type leads to a disagreement with the Big Bang nucleosynthesis predictions.