2017:groups:higgs:2h
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2017:groups:higgs:2h [2017/06/17 15:35] jose_miguel.no |
2017:groups:higgs:2h [2017/06/20 14:05] ramona.groeber |
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| - | Interested people: Jose Miguel No, Jose Zurita, | + | ====== Higgs Self Coupling and di-Higgs ====== |
| - | 1. V phi, with phi -> gamma gamma, what does the LHC can say? | ||
| - | bounds from LEP. what is the LHC capability? | + | Interested people: Fabio Maltoni, Minho Son, José Zurita, Benjamin Fuks, Ramona Groeber, Alexandra Carvalho ... |
| - | + | \\ | |
| - | bounds from H coupling measurements to ZZ and EWPT | + | \\ |
| - | + | We will discuss the resonant production together with the "Interference" group. | |
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| - | + | Idea so far: Parameterise resonant production in terms of 5 parameters. Check when only a subset is necessary, check under which circumstances there is sizeable interference with box and 125 GeV Higgs exchange. | |
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| - | 2. Complementarity with phi single production together with a ISR | + | \\ |
| - | + | Further possible discussion points for the kick-off meeting:\\ | |
| - | 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"). | + | 1.) status what kind of analysis ongoing?\\ |
| - | + | 2.) resonant production searches at the moment in terms of benchmarks, how to benchmark, generalisation, interference?\\ | |
| - | 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?). | + | 3.) combination different final states \\ |
| - | + | 4.) Scenarios that allow us to observe new physics for first time in HH production?\\ | |
| - | + | 5.) in EFT analysis BR remain SM-like, can be improved on that? \\ | |
| - | + | 6.) larger bounds on trilinear Higgs self-coupling can be usually obtained in negative range, but most models have positive deviation, which models have negative deviation?\\ | |
| - | 3. Exotic Higgs decays: What are the holes? | + | |
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| - | h -> a a, Z a, a a' with a, a' scalar/pseudoscalar (for Z a, a is pseudoscalar) | + | |
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| - | * 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 constrain) | + | |
| - | * h -> Z a (a -> gamma gamma) has been initially studied by Bauer, Neubert, Thamm in , 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) | + | |
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| - | h->chi1 chi2 | + | |
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| - | h->ss->SM (eventually scalars with different masses h-> s1s2) | + | |
| - | what are the holes? | + | |
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| - | * decays involving missing energy: h->chi1 chi2 with chi1 invisible | + | |
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| - | * s with displaced decays. Role of the LHCb | + | |
2017/groups/higgs/2h.txt · Last modified: 2017/06/25 21:28 by majumder.devdatta
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