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arXiv 1206.5701hep-phhep-ex
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SO(10)的耦合统一、大统一尺度重子生成和中子-反中子振荡

Coupling Unification, GUT-Scale Baryogenesis and Neutron-Antineutron Oscillation in SO(10)

K. S. Babu, R. N. Mohapatra

摘要:

我们证明了,如果色六重态标量场在TeV尺度下仍然存在,那么在一类一步破缺到标准模型的非超对称SO(10)模型中,三个规范场耦合的统一可以一致地实现.这样的标量,应该可以被LHC直接探测到,在SO(10)中自然产生,作为中微子质量的跷跷板机制的残余。这些标量的双夸克耦合导致了ΔB = 2重子数的破坏过程,如中子-反中子振荡。我们估计自由中子-反中子跃迁时间为τ_{n- \bar{n} } \approx(10 ^9 -10^{12})秒,其在下一代n- \bar{n}振荡实验的感兴趣的范围内。这些模型也自然地实现了最近提出的(B-L)-违反GUT标度重子发生,生存到低温不受电弱sphaleron相互作用。

英文摘要:

We show that unification of the three gauge couplings can be realized consistently in a class of non-supersymmetric SO(10) models with a one-step breaking to the Standard Model if a color-sextet scalar field survives down to the TeV scale. Such scalars, which should be accessible to the LHC for direct detection, arise naturally in SO(10) as remnants of the seesaw mechanism for neutrino masses. The diquark couplings of these scalars lead to ΔB = 2 baryon number violating processes such as neutron-antineutron oscillation. We estimate the free neutron-antineutron transition time to be τ_{n-\bar{n}} \approx (10^9-10^{12}) sec., which is in the interesting range for next generation n-\bar{n} oscillation experiments. These models also realize naturally the recently proposed (B-L)-violating GUT scale baryogenesis which survives to low temperatures unaffected by the electroweak sphaleron interactions.

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