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arXiv 0709.2350hep-phastro-phhep-th
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非粒子作为连续质量标量的宇宙学约束

Cosmological Constraints on Unparticles as Continuous Mass Scalars

John McDonald

摘要:

本文研究了非粒子相互作用的宇宙学约束和非粒子态可以被模拟为寿命> 1 s的连续质量粒子的情况下的宇宙温度。通过考虑热背景夸克通过d_{U}维标量算符衰变为连续质量标量,我们证明了核合成时宇宙不受标量支配的条件对非粒子扇区的相互作用标度施加了一个下界,当Λ U} > 1 \TeV $时,M_{U} > 20-2600 TeV,1.1 < d_{U} < 2.0和2 < d_{BZ} < 4。长寿命标量扇区的存在也对辐射主导期间的宇宙温度施加了上限,对于接近其下限的M_{U},该上限可以低至TeV。

英文摘要:

We study the cosmological constraints on unparticle interactions and the temperature of the Universe for the case where unparticle states can be modelled as continuous mass particles with lifetime > 1s. By considering thermal background quark decay to continuous mass scalars via a scalar operator of dimension d_{U}, we show that the condition that the Universe is not dominated by scalars at nucleosynthesis imposes a lower bound on the scale of the interaction of the unparticle sector, with M_{U} > 20-2600 TeV for Λ_{U} > 1 \TeV$, 1.1 < d_{U} < 2.0 and 2 < d_{BZ} < 4. The existence of a long-lived scalar sector also imposes an upper bound on the temperature of the Universe during radiation-domination, which can be as low as a TeV for M_{U} close to its lower bound.

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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