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Of Particular Significance

Higgs Experts: A Small But Important Correction to a Previous Post

14 Mar 2014, 13:15 UTC
Higgs Experts: A Small But Important Correction to a Previous Post
(200 words excerpt, click title or image to see full post)

I have to admit that this post is really only important for experimentalists interested in searching for non-Standard Model decays of the Higgs particle. I try to keep these technical posts very rare, but this time I do need to slightly amend a technical point that I made in an article a few weeks ago.
Recently I wrote an article on this website, which I briefly described in this post, about the possibility that the Higgs particle might decay to two new spin-one particles (which I called a “ZD“), each of which could then decay to a lepton-antilepton pair. Based on my recent paper with twelve other authors about the possibility of unexpected (“exotic”) decays of the Higgs particle, I argued that this could be discovered with existing LHC data from 2011-2012, even if it only happens in one in every 100,000 Higgs particles.
All of that is correct. But in the second-to-last paragraph of that article, I also briefly noted a different variant of this possibility: that the Higgs might occasionally decay to a (known) Z particle plus an (unknown) ZD particle. For this possibility, I said something which my co-authors and I now think is not correct — ...

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