Coupling unification, GUT scale baryogenesis and neutron-antineutron oscillation in

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• 作者：K.S. Babu ; R.N. Mohapatra
• 刊名：Physics Letters B
• 出版年：2012
• 出版时间：10 September, 2012
• 年：2012
• 卷：715
• 期：4-5
• 页码：328-334
• 全文大小：244 K

文摘

We show that unification of the three gauge couplings can be realized consistently in a class of non-supersymmetric 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 as remnants of the seesaw mechanism for neutrino masses. The diquark couplings of these scalars lead to baryon number violating processes such as neutron-antineutron oscillation. We estimate the free neutron-antineutron transition time to be , which is in the interesting range for next generation n- oscillation experiments. These models also realize naturally the recently proposed violating GUT scale baryogenesis which survives to low temperatures unaffected by the electroweak sphaleron interactions.