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--- 2017:groups:higgs:2h [2017/06/17 09:49]
jose_francisco.zurita created
+++ 2017:groups:higgs:2h [2017/06/17 15:45]
jose_miguel.no
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+Interested people: Jose Miguel No, Jose Zurita, Stefania Gori
+. V phi, with phi -> gamma gamma, what does the LHC can say?
+bounds from LEP. what is the LHC capability?
+bounds from H coupling measurements to ZZ and EWPT
+. Complementarity with phi single production together with a ISR
+Light scalars (m_{phi} < m_h = 125 GeV) with no phi V V coupling (V = SM gauge boson) but coupling to fermions. Motivated in extended Higgs sectors (e.g. light Higgses in 2HDM) when the 125 GeV is SM like (2HDM "alignment limit").
+Weakly constrained by LEP (no V phi production). Maybe challenging @ LHC? phi recoiling against a hard jet could allow to trigger on this (phi -> gamma gamma? tau tau?).
+. Exotic Higgs decays: What are the holes?
+h -> a a, Z a, a a' with a, a' scalar/pseudoscalar (for Z a, a is pseudoscalar)
+   * Current searches for h -> a a: 4 muon, 2 mu 2 b, 4 tau, 2 tau 2 mu, 4 b...
+   * Interesting to look at signatures with resolved/not resolved photons: 2b 2gamma, 4 gamma (for unresolved 2 gamma pairs, measurement of h->gamma gamma could yield weak constraint)
+   * h -> Z a (a -> gamma gamma) has been initially studied by Bauer, Neubert, Thamm in [[https://arxiv.org/pdf/1704.08207|1704.08207]], for a being an ALP (axion-like particle)
+   * h -> a a': if ma is different from ma', h -> a a searches would miss it (also depends on final state)
+h->chi1 chi2
+  * Decays involving MET? (e.g. chi1 invisible); (Also considerable for h -> a a' and h -> Z a)
+Exotic Higgs decays into LLP (displaced vertices). Role of LHCb (also BaBar, Belle II)

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