2017:groups:higgs:fxsnp
Differences
This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision Next revision | Previous revision | ||
|
2017:groups:higgs:fxsnp [2017/06/19 23:32] sabine.kraml |
2017:groups:higgs:fxsnp [2017/06/26 19:17] (current) sabine.kraml |
||
|---|---|---|---|
| Line 1: | Line 1: | ||
| - | ===== Using fiducial measurements/distributions to constrain new physics ===== | + | ===== Using Higgs fiducial cross sections and differential distributions to constrain new physics ===== |
| - | Interested people: Kentarou, Sabine, Benj, Stefania, Stefan, Jérémie **add your name if interested** | + | Interested people: Kentarou, Sabine, Benj, Stefania, Stefan, Jérémie, Ursula, Kristin, Fabio, Andy **add your name if interested** |
| The use of signal strength measurements (kappa framework, reduced couplings...) for constraining deviations from the SM is well established, and public tools (HiggsSignals, Lilith) exist for performing fits to the data. Two limitations of the signal strength approach are that it assumes | The use of signal strength measurements (kappa framework, reduced couplings...) for constraining deviations from the SM is well established, and public tools (HiggsSignals, Lilith) exist for performing fits to the data. Two limitations of the signal strength approach are that it assumes | ||
| Line 11: | Line 11: | ||
| Rivet routines are available for the ATLAS diphoton and 4l measurements at 8 TeV. These could be used to constrain additional Higgs production from e.g. | Rivet routines are available for the ATLAS diphoton and 4l measurements at 8 TeV. These could be used to constrain additional Higgs production from e.g. | ||
| * A -> Zh | * A -> Zh | ||
| - | * VQL decays to Higgs | + | * VLQ decays to Higgs |
| * Higgs production from SUSY cascades, e.g. pp -> sbottom pair -> bbH(H) + MET, see https://arxiv.org/abs/1703.06544, or pp -> chi_1 chi_2 -> H + MET | * Higgs production from SUSY cascades, e.g. pp -> sbottom pair -> bbH(H) + MET, see https://arxiv.org/abs/1703.06544, or pp -> chi_1 chi_2 -> H + MET | ||
| * single hZ, hW, h+MET | * single hZ, hW, h+MET | ||
| * X -> h+l, h+gamma, h+jet, h+b, h+t | * X -> h+l, h+gamma, h+jet, h+b, h+t | ||
| - | ATLAS 8 TeV Rivet routines are easily converted to CMS8TeV and/or 13 TeV measurements; numbers to be taken from plots or hepdata. | + | ATLAS 8 TeV Rivet routines are easily converted to CMS8TeV and/or 13 TeV measurements; plots however need to be digitalised, not all is on hepdata. |
| One interesting point would be to identify what can be done with and without this. Checking how constraints vary. | One interesting point would be to identify what can be done with and without this. Checking how constraints vary. | ||
| + | |||
| + | See also this [[https://indico.cern.ch/event/525142/contributions/2173709/attachments/1292787/1926290/Talk_PDF.pdf|talk by F. Bernlocher]] on HFXS at Reinterpretation Forum meeting June 2016. | ||
| === ATLAS and CMS results === | === ATLAS and CMS results === | ||
| | ^ gamma-gamma ^ ZZ*->4l ^ WW*->2l2nu ^ | | ^ gamma-gamma ^ ZZ*->4l ^ WW*->2l2nu ^ | ||
| - | ^ 8 TeV | [[https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2013-10/|ATLAS-HIGG-2013-10]] | [[https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2013-22/|ATLAS-HIGG-2013-22]] | | | + | ^ 8 TeV | [[https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2013-10/|ATLAS-HIGG-2013-10]] | [[https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2013-22/|ATLAS-HIGG-2013-22]] | [[https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2015-04/|HIGG-2015-04]] | |
| - | | | [[http://cms-results.web.cern.ch/cms-results/public-results/publications/HIG-14-016/index.html|CMS-HIG-14-016]] | [[http://cms-results.web.cern.ch/cms-results/public-results/preliminary-results/CMS-HIG-14-028/index.html|CMS-HIG-14-028]] | | | + | | | [[http://cms-results.web.cern.ch/cms-results/public-results/publications/HIG-14-016/index.html|CMS-HIG-14-016]] | [[http://cms-results.web.cern.ch/cms-results/public-results/publications/CMS-HIG-14-028/index.html|CMS-HIG-14-028]] | [[http://cms-results.web.cern.ch/cms-results/public-results/publications/CMS-HIG-15-010/index.html|CMS-HIG-15-010]] | |
| ^ 13 TeV | [[https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/CONFNOTES/ATLAS-CONF-2016-067/|ATLAS-CONF-2016-067]] | [[https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/CONFNOTES/ATLAS-CONF-2017-032|ATLAS-CONF-2017-032]] | | | ^ 13 TeV | [[https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/CONFNOTES/ATLAS-CONF-2016-067/|ATLAS-CONF-2016-067]] | [[https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/CONFNOTES/ATLAS-CONF-2017-032|ATLAS-CONF-2017-032]] | | | ||
| | | [[http://cms-results.web.cern.ch/cms-results/public-results/preliminary-results/HIG-17-015/index.html|CMS-HIG-17-015]] | | | | | [[http://cms-results.web.cern.ch/cms-results/public-results/preliminary-results/HIG-17-015/index.html|CMS-HIG-17-015]] | | | ||
| + | |||
| === Concrete project proposals === | === Concrete project proposals === | ||
| - 'Generic' study | - 'Generic' study | ||
| - | - Simulate signal for above mentioned scenarios, let Higgs decay to 2 photons or ZZ*, run through Rivet analysis and put result on top of SM expectation for fiducial Xsection and differential distributions published by the collaboration. | + | - Simulate signal for above mentioned scenarios, let Higgs decay to 2 photons or ZZ*, run through Rivet analysis (or your own implementation of the fiducial cuts) and put result on top of SM expectation for fiducial Xsection and differential distributions published by the collaboration. |
| - | - For the cases with a visible effect, compute the chi^2. Beware, the various histograms are not statistically independent, one needs to determine the most sensitive bin from all histograms. | + | - For the cases with a visible effect, compute the chi^2. Beware, the various histograms are not statistically independent, one needs to determine the most sensitive bin from all histograms. In principle [[https://contur.hepforge.org|Contur]] does exactly this, but it assumes SM=data, so this needs to be extended by the actual SM prediction. |
| + | - Wouldn't it be instructive to quantitatively estimate the gain from a pure signal strength approach? | ||
| - 2HDM-spcific study: From a general scan of the 2HDM fitting all the Higgs constraints in the usual way (signal strengths, cross section limits on heavy Higgs production), take the points with largest cross sections for pp->A->Zh and see whether these would contribute in any significant way to the fiducial Higgs measurements. Best consider 2HDM Type I, as it allows for lighter A. The plots below show the cross sections for gg->A->Zh at 13 TeV in the quasi-alignment limit from [[https://arxiv.org/abs/1507.00933|1507.00933]]: | - 2HDM-spcific study: From a general scan of the 2HDM fitting all the Higgs constraints in the usual way (signal strengths, cross section limits on heavy Higgs production), take the points with largest cross sections for pp->A->Zh and see whether these would contribute in any significant way to the fiducial Higgs measurements. Best consider 2HDM Type I, as it allows for lighter A. The plots below show the cross sections for gg->A->Zh at 13 TeV in the quasi-alignment limit from [[https://arxiv.org/abs/1507.00933|1507.00933]]: | ||
| {{:2017:groups:higgs:ma_gga13_zh_tb_cv99_h_i_l2h.jpeg?direct&200|}}{{:2017:groups:higgs:ma_gga13_zh_tb_cv99_h_ii_l2h.jpeg?direct&200|}} | {{:2017:groups:higgs:ma_gga13_zh_tb_cv99_h_i_l2h.jpeg?direct&200|}}{{:2017:groups:higgs:ma_gga13_zh_tb_cv99_h_ii_l2h.jpeg?direct&200|}} | ||
| + | |||
| + | === Ongoing or planned activities === | ||
| + | |||
| + | * Benjamin and Fabio want to produce [[2017:groups:higgs:fxsnp:ufo|UFO file]] for 'weird Higgs production' modes | ||
| + | * Ursula is looking at Higgs production from sbottom decays, see [[2017:groups:higgs:fxsnp:susycascades|first results here]]. | ||
| Line 46: | Line 55: | ||
| * The compatibility of LHC Run 1 data with a heavy scalar of mass around 270 GeV. Stefan von Buddenbrock et al. http://arxiv.org/abs/arXiv:1506.00612 | * The compatibility of LHC Run 1 data with a heavy scalar of mass around 270 GeV. Stefan von Buddenbrock et al. http://arxiv.org/abs/arXiv:1506.00612 | ||
| * //add more ...// | * //add more ...// | ||
| + | |||
| + | === Blackboard of the discussion === | ||
| + | {{:2017:groups:higgs:img_0586.jpg?400|}} | ||
2017/groups/higgs/fxsnp.1497907968.txt.gz · Last modified: 2017/06/19 23:32 by sabine.kraml
Page Tools
Except where otherwise noted, content on this wiki is licensed under the following license: Public Domain
