2017:groups:tools:contur_for_light_scalar_particles
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2017:groups:tools:contur_for_light_scalar_particles [2017/10/01 11:05] jonathan.butterworth |
2017:groups:tools:contur_for_light_scalar_particles [2017/10/11 23:47] (current) jonathan.butterworth |
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| {{:2017:groups:tools:cl_78wzg_nso.png?200|}} $(l^+l^-)$ or $(l + E_T^{\rm miss}) + \gamma$ | {{:2017:groups:tools:cl_78wzg_nso.png?200|}} $(l^+l^-)$ or $(l + E_T^{\rm miss}) + \gamma$ | ||
| - | {{:2017:groups:tools:cl_8metg_nso.png?200|}} $E_T^{\rm miss} + \gamma$ | + | {{:2017:groups:tools:cl_8metg_nso.png?200|}} $E_T^{\rm miss} + \gamma (\gamma)$ |
| {{:2017:groups:tools:cl_78photons_nso.png?200|}} Inclusive and di-photons | {{:2017:groups:tools:cl_78photons_nso.png?200|}} Inclusive and di-photons | ||
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| == $M_\phi = 10$ GeV, $\Lambda = 3.5$ TeV == | == $M_\phi = 10$ GeV, $\Lambda = 3.5$ TeV == | ||
| - | > [[http://www.hep.ucl.ac.uk/~jmb/Work/LH/NSCPO/8TeV/mP_10_f0_3500/contur-plots/|Page of plots]]: The most powerful exclusion comes from the $\gamma + E_T^{\rm miss}$ channel, specifically the $E_T^\gamma$ differential cross section for events with no jets, in [[http://www.hep.ucl.ac.uk/~jmb/Work/LH/NSCPO/8TeV/mP_10_f0_3500/contur-plots/ATLAS_2016_I1448301_NU/index.html|this paper]]. There is also some exclusion from the $\tau$ distribution in the $H \rightarrow \gamma\gamma$ paper - see below for more on that. | + | > [[http://www.hep.ucl.ac.uk/~jmb/Work/LH/NSCPO/8TeV/mP_10_f0_3500/contur-plots/|Page of plots]]: The most powerful exclusion in the 8 TeV data comes from the $\gamma + E_T^{\rm miss}$ channel, specifically the $E_T^\gamma$ differential cross section for events with no jets, in [[http://www.hep.ucl.ac.uk/~jmb/Work/LH/NSCPO/8TeV/mP_10_f0_3500/contur-plots/ATLAS_2016_I1448301_NU/index.html|this paper]]. There is also some exclusion from the $\tau$ distribution in the $H \rightarrow \gamma\gamma$ paper - see below for more on that. Also once the 7 TeV data are included, the inclusive and diphotons cover this point on their own. |
| == $M_\phi = 20$ GeV, $\Lambda = 3.5$ TeV == | == $M_\phi = 20$ GeV, $\Lambda = 3.5$ TeV == | ||
| - | > [[http://www.hep.ucl.ac.uk/~jmb/Work/LH/NSCPO/8TeV/mP_20_f0_3500/contur-plots/|Page of plots]]: Another low mass, moderate coupling point. Chosen because for this one, diphoton measurements give the most powerful exclusion (although $\gamma + E_T^{\rm miss}$ still contributes). The [[http://www.hep.ucl.ac.uk/~jmb/Work/LH/NSCPO/8TeV/mP_20_f0_3500/contur-plots/ATLAS_2017_I1591327/index.html|inclusive diphotons]] would contribute at low $M_{\gamma\gamma}$, because the 20 GeV mass of the $\phi$ now sneaks into the measurement at the bottom of the range, but the most sensitive plot in the diphoton category (and thus the one chosen by Contur) is again from the [[http://www.hep.ucl.ac.uk/~jmb/Work/LH/NSCPO/8TeV/mP_20_f0_3500/contur-plots/ATLAS_2014_I1306615/index.html|Higgs paper]], this time $p_T^{\gamma\gamma}$. This is maybe surprising because the Higgs measurement has a mass window cut at $105 < M^{\gamma\gamma} < 160$ GeV, much higher than $M_\phi$. The contribution to the Higgs fiducial phase space seems to be coming from $q\bar{q} \rightarrow \phi \gamma$ events, where the additional photon pairs with one of the $\phi$ decay products. This interesting but should probably not be taken face value because it is not clear how such a contribution would impact on the continuum in the fits used to extract the $H \rightarrow \gamma\gamma$ cross section. | + | > [[http://www.hep.ucl.ac.uk/~jmb/Work/LH/NSCPO/8TeV/mP_20_f0_3500/contur-plots/|Page of plots]]: Another low mass, moderate coupling point. Chosen because for this one, diphoton measurements give the most powerful exclusion for the 8 TeV data set (although $\gamma + E_T^{\rm miss}$ still contributes, and once 7 TeV are included, the photon measurement would rule this point out too). The [[http://www.hep.ucl.ac.uk/~jmb/Work/LH/NSCPO/8TeV/mP_20_f0_3500/contur-plots/ATLAS_2017_I1591327/index.html|inclusive diphotons]] would contribute at low $M_{\gamma\gamma}$, because the 20 GeV mass of the $\phi$ now sneaks into the measurement at the bottom of the range, but the most sensitive plot in the diphoton category (and thus the one chosen by Contur) is again from the [[http://www.hep.ucl.ac.uk/~jmb/Work/LH/NSCPO/8TeV/mP_20_f0_3500/contur-plots/ATLAS_2014_I1306615/index.html|Higgs paper]], this time $p_T^{\gamma\gamma}$. This is maybe surprising because the Higgs measurement has a mass window cut at $105 < M^{\gamma\gamma} < 160$ GeV, much higher than $M_\phi$. The contribution to the Higgs fiducial phase space seems to be coming from $q\bar{q} \rightarrow \phi \gamma$ events, where the additional photon pairs with one of the $\phi$ decay products. This interesting but should probably not be taken face value because it is not clear how such a contribution would impact on the continuum in the fits used to extract the $H \rightarrow \gamma\gamma$ cross section. |
| == $M_\phi = 80$ GeV, $\Lambda = 7.5$ TeV == | == $M_\phi = 80$ GeV, $\Lambda = 7.5$ TeV == | ||
| - | > [[http://www.hep.ucl.ac.uk/~jmb/Work/LH/NSCPO/8TeV/mP_80_f0_7500/contur-plots/|Page of plots]]: This point is chosen to look at the higher end of the $M_\phi$ range, where the sensitivity is greater, and so we look at a high $\Lambda$ value. Again the sensitivity is driven by [[http://www.hep.ucl.ac.uk/~jmb/Work/LH/NSCPO/8TeV/mP_80_f0_7500/contur-plots/ATLAS_2016_I1448301_NU/index.html|this paper]], but now it is the $\gamma\gamma + E_T^{\rm miss}$ cross section that does the work. | + | > [[http://www.hep.ucl.ac.uk/~jmb/Work/LH/NSCPO/8TeV/mP_80_f0_7500/contur-plots/|Page of plots]]: This point is chosen to look at the higher end of the $M_\phi$ range, where the sensitivity is greater, and so we look at a high $\Lambda$ value. Again the sensitivity is driven by [[http://www.hep.ucl.ac.uk/~jmb/Work/LH/NSCPO/8TeV/mP_80_f0_7500/contur-plots/ATLAS_2016_I1448301_NU/index.html|this paper]], but now it is the $\gamma\gamma + E_T^{\rm miss}$ cross section that does the work. And again once the 7 TeV data are included, the inclusive and diphotons cover this point on their own. |
| == CP-even results== | == CP-even results== | ||
| Line 79: | Line 79: | ||
| Note that the sensitivity at low $M_\phi$ and $\Lambda$ is somewhat reduced, especially for the $E_T^{\rm miss} + \gamma$ channel. Presumably something to do with the angular distributions of the decay photons of the $\phi$, but to be studied... | Note that the sensitivity at low $M_\phi$ and $\Lambda$ is somewhat reduced, especially for the $E_T^{\rm miss} + \gamma$ channel. Presumably something to do with the angular distributions of the decay photons of the $\phi$, but to be studied... | ||
| + | |||
| + | There is still 95% exclusion even at the highest $\Lambda$ values studied. Would be interesting to see how far it goes. Update - not very far? Here's an 8 TeV run going to higher values. | ||
| + | |||
| + | {{:2017:groups:tools:cl_8extended.png?300|}}{{:2017:groups:tools:contur_8tev-cpe-extended.png?300|}} | ||
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