VLQs at future colliders and implications for CHMs
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1 VLQs at future colliders and implications for CHMs Mikael Chala (IPPP) With R. Grober and M. Spannowsky. To appear soon
2 The composite Higgs paradigm (a high-energy copy of QCD) UV GeV scale IR
3 The composite Higgs paradigm (a high-energy copy of QCD) UV quark condensate GeV scale IR
4 The composite Higgs paradigm (a high-energy copy of QCD) UV quark condensate GeV scale IR
5 The composite Higgs paradigm (a high-energy copy of QCD) UV quark condensate GeV scale IR
6 The composite Higgs paradigm (a high-energy copy of QCD) UV TeV scale IR
7 The composite Higgs paradigm (a high-energy copy of QCD) UV TeV scale IR
8 The composite Higgs paradigm (a high-energy copy of QCD) UV parton condensate TeV scale IR
9 The composite Higgs paradigm (a high-energy copy of QCD) UV parton condensate TeV scale IR
10 The composite Higgs paradigm (a high-energy copy of QCD) UV parton condensate TeV scale IR
11 The composite Higgs paradigm (a high-energy copy of QCD) UV parton condensate TeV scale IR
12 The composite Higgs paradigm (a high-energy copy of QCD) UV parton condensate TeV scale IR
13 The composite Higgs paradigm (a high-energy copy of QCD) UV parton condensate TeV scale IR
14 Current constraints on VLQs (only direct searches) Top partner masses above 1 TeV according to ATLAS and CMS analyses (although quite model dependent)
15 Current constraints on VLQs (only direct searches) Top partner masses above 1 TeV according to ATLAS and CMS analyses (although quite model dependent)
16 Current constraints on VLQs (only direct searches) Top partner masses above 1 TeV according to ATLAS and CMS analyses (although quite model dependent) Upper bounds ranged from TeV [ ] to < 1 TeV [ , , , , ]. Ref. [ ] showed that masses around 2 TeV are compatible with tuning of order 100 in some CHMs
17 Current constraints on VLQs (only direct searches) Top partner masses above 1 TeV according to ATLAS and CMS analyses (although quite model dependent) Upper bounds ranged from TeV [ ] to < 1 TeV [ , , , , ]. Ref. [ ] showed that masses around 2 TeV are compatible with tuning of order 100 in some CHMs NB: Tuning gives only a (rough) order of magnitude!
18 VLQs could be well out of the LHC reach (this is expected in CHMs with DM!) Similarity of WIMP and EW scales explained Naturally small portal couplings DM annihilates then via derivative interations Compositeness scale fixed by real observable!
19 VLQs could be well out of the LHC reach (this is expected in CHMs with DM!) Similarity of WIMP and EW scales explained Naturally small portal couplings DM annihilates then via derivative interations Compositeness scale fixed by real observable!
20 VLQs could be well out of the LHC reach (this is expected in CHMs with DM!) Similarity of WIMP and EW scales explained Naturally small portal couplings DM annihilates then via derivative interations Compositeness scale fixed by real observable!
21 VLQs could be well out of the LHC reach (this is expected in CHMs with DM!) Similarity of WIMP and EW scales explained Naturally small portal couplings DM annihilates then via derivative interations Compositeness scale fixed by real observable!
22 VLQs could be well out of the LHC reach (this is expected in CHMs with DM!) Similarity of WIMP and EW scales explained Naturally small portal couplings DM annihilates then via derivative interations Compositeness scale fixed by real observable!
23 Simple yet broad parameterization (several CHMs captured) H and S stand for the Higgs doublet and the DM singlet, respectively. We neglect the last term in our analysis
24 Simple yet broad parameterization (several CHMs captured) H and S stand for the Higgs doublet and the DM singlet, respectively. We neglect the last term in our analysis
25 Simple yet broad parameterization (several CHMs captured) H and S stand for the Higgs doublet and the DM singlet, respectively. We neglect the last term in our analysis
26 Matching to concrete models (with one stable pngb singlet) a coefficients fixed by the sigma model. Others depend on fermionic representations. e.g. SO(6)/SO(5) with 20+1:
27 Matching to concrete models (with one stable pngb singlet) a coefficients fixed by the sigma model. Others depend on fermionic representations. e.g. SO(6)/SO(5) with 20+1:
28 Matching to concrete models (with one stable pngb singlet) a coefficients fixed by the sigma model. Others depend on fermionic representations. e.g. SO(6)/SO(5) with 20+1:
29
30
31
32 LHC constraints on VLQs (non-sm decays also present) In all our cases of interest, there is always a custodial fourplet of VLQs and/or a VLQ decaying 100 % into St m < 1.2 TeV (expected 1.7 for 3/ab), [ ]
33 Prospects for 100 TeV (VLQs with SM decays) The most important cuts we impose are shown below. The most important backgrounds are then: ttvv, tttt, ttv + jets.
34 Prospects for 100 TeV (VLQs with SM decays) The most important cuts we impose are shown below. The most important backgrounds are then: ttvv, tttt, ttv + jets.
35 Prospects for 100 TeV (VLQs with exotic decay) Searches for pair-produced stops decaying into neutralino apply, [ ]
36 Prospects for 100 TeV (VLQs with exotic decay) Searches for pair-produced stops decaying into neutralino apply, [ ]
37 Prospects for 100 TeV (VLQs with exotic decay) Having all together (preliminary): LHC (solid red), solid orange (LUX), relic (green), dashed red (100 TeV)
38 Conclusions
39 Fine-tuning arguments cannot definitely partners above the LHC reach limit exclude top Models of composite Higgs with DM (in which f is fixed by observation) suggest m > 2 TeV Searches for VLQs (in SM decays) at 100 TeV collider can test masses as large as 5 TeV. Searches for VLQs (in stoplike decay) can test even larger masses: 9 TeV 100 TeV collider excellent facility to test many composite Higgs models, and complement DM experiments
40 Fine-tuning arguments cannot definitely partners above the LHC reach limit exclude top Models of composite Higgs with DM (in which f is fixed by observation) suggest m > 2 TeV Searches for VLQs (in SM decays) at 100 TeV collider can test masses as large as 5 TeV. Searches for VLQs (in stoplike decay) can test even larger masses: 9 TeV 100 TeV collider excellent facility to test many composite Higgs models, and complement DM experiments Thank you for your attention!
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