Gravitino and Polonyi production in supergravity
Gravitino and Polonyi production in supergravity
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DOI：
10.1140/epjc/s10052-018-6111-7
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发表时间：
2017-08
期刊：
影响因子：
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通讯作者：
A. Addazi;S. Ketov;M. Khlopov
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作者：
A. Addazi;S. Ketov;M. Khlopov
我们研究了最小Starobinsky-Poloniis超引力中的引力粒子和Polonyi粒子的产生，其中的膨胀子属于质量向量超多重。我们的模型只有一个自由参数，它是由Polonyi手征超场触发的自发超对称破缺尺度给出的。向量超乘法一般通过任意实函数非最小地进入作用。选择此函数来生成Starobinsky模型的膨胀标量势。我们的超引力模型可以被重新表述为阿贝尔超对称规范理论，其中矢量规范超场耦合到两个(Higgs和Polonyi)手征超场与超引力相互作用，其中U(1)规范对称性自发破缺。我们发现在膨胀过程中有效地产生了Polonyi粒子和Gravitino粒子，并估计了它们的质量和再加热温度。膨胀后，膨胀粒子的微扰衰变也会产生波隆尼粒子，这些粒子会迅速衰变成引力星。结果，出现了一幅关于膨胀和暗物质的连贯图景，其中膨胀后产生的大量引力子符合CMB作为超重暗物质(SHDM)候选者的限制。我们的方案避免了大爆炸核合成(BBN)和DM生产过剩带来的严重的引力和波隆尼问题。
We study production of gravitino and Polonyi particles in the minimal Starobinsky-Polonyisupergravity with inflaton belonging to a massive vector supermultiplet. Our model has only one free parameter given by the scale of spontaneous SUSY breaking triggered by Polonyi chiral superfield. The vector supermultiplet generically enters the action non-minimally, via an arbitrary real function. This function is chosen to generate the inflaton scalar potential of the Starobinsky model. Our supergravity model can be reformulated as an abelian supersymmetric gauge theory with the vector gauge superfield coupled to two (Higgs and Polonyi) chiral superfields interacting with supergravity, where theU(1) gauge symmetry is spontaneously broken. We find that Polonyi and gravitino particles are efficiently produced during inflation, and estimate their masses and the reheating temperature. After inflation, perturbative decay of inflaton also produces Polonyi particles that rapidly decay into gravitinos. As a result, a coherent picture of inflation and dark matter emerges, where the abundance of produced gravitinos after inflation fits the CMB constraints as a Super Heavy Dark Matter (SHDM) candidate. Our scenario avoids the notorous gravitino and Polonyi problems with the Big Bang Nucleosynthesis (BBN) and DM overproduction.