So what signs would be expected in the detectors of future accelerators? The Higgs itself would remain unnoticed, as would the two Hidden Valley particles. Each of these would, in picoseconds-that is, trillionths of a second-decay into another two particles, with even smaller masses, which would then be within the Standard Model. The communicator, after passing into the low energy region, would decay into two rather massive exotic particles. Marcin Kucharczyk (IFJ PAN), lead author of an article in the Journal of High Energy Physics, which presents the latest analyses and simulations concerning the possibility of detecting Higgs boson decays in the future lepton accelerators. The Higgs boson, one of the most massive particle of the Standard Model, is a very good candidate for such a communicator,' explains Prof. The particles like Higgs boson or hypothetic Z' boson would act as communicators between the particles of both worlds. The theory is that there could then be exotic massive particles which could cross this barrier under specific circumstances. 'In Hidden Valley models we have two groups of particles separated by an energy barrier. However, scientists at the Institute of Nuclear Physics of the Polish Academy of Sciences (IFJ PAN) in Cracow argue that Higgs decays into exotic particles should already be perfectly observable in accelerators that are successors to the Large Hadron Collider-if the Hidden Valley models turn out to be consistent with reality. Theoretical considerations suggest then the exotic decay of the famous Higgs boson, something that has not been observed at the LHC accelerator despite many years of searching. In these so-called Hidden Valley models, the particles of our world as described by the Standard Model belong to the low-energy group, while exotic particles are hidden in the high-energy region. However, in high-energy physics, this picturesque name is given to certain models that extend the set of currently known elementary particles. When talking about the 'hidden valley,' our first thoughts are of dragons rather than sound science.

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