2019:groups:higgs:lightscalars:exotichdecays
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2019:groups:higgs:lightscalars:exotichdecays [2019/06/24 14:14] jose.miguel.no |
2019:groups:higgs:lightscalars:exotichdecays [2019/06/26 09:20] (current) antoine.lesauvage |
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| We consider two decay modes of $\phi$: $\phi \to \gamma \gamma$, $\phi \to \mu \mu$ | We consider two decay modes of $\phi$: $\phi \to \gamma \gamma$, $\phi \to \mu \mu$ | ||
| - | * $\phi$ -> $\gamma\gamma$. (**SG**) | + | * $\phi$ -> $\gamma\gamma$. (**SG,AL**) |
| Preliminary study from Bauer, Neubert, Thamm [[https://arxiv.org/abs/1708.00443|1708.00443]] (see also [[https://arxiv.org/pdf/1704.08207.pdf|1704.08207]]). | Preliminary study from Bauer, Neubert, Thamm [[https://arxiv.org/abs/1708.00443|1708.00443]] (see also [[https://arxiv.org/pdf/1704.08207.pdf|1704.08207]]). | ||
| - | For m_a < 47 MeV, constraints from $h \to Z \gamma$, since for m_a < 47 MeV the two photons from the $\phi$ decay are very collimated and seen as one in the detector. | + | For m_{\phi} < 47 MeV, constraints from $h \to Z \gamma$, since for m_{\phi} < 47 MeV the two photons from the $\phi$ decay are very collimated and seen as one in the detector. |
| - | For m_a > 47 MeV, they compute just number of signal events for $gg \to h \to Z \phi$, and assume limits for 100 events at LHC. | + | For m_{\phi} > 47 MeV, they compute just number of signal events for $gg \to h \to Z \phi$, and assume limits for 100 events at LHC. |
| $m_\phi < 35$ GeV: $h \to Z \phi$ (on-shell $Z \to \ell\ell$) | $m_\phi < 35$ GeV: $h \to Z \phi$ (on-shell $Z \to \ell\ell$) | ||
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| __TO DO LIST__ | __TO DO LIST__ | ||
| - | - Validate UFO File {{ :2019:groups:higgs:alp-pr.tar.gz |ALP UFO file }} (fixed by Peter Richardson) from Bauer, Thamm, Neubert . //NOTE: We need to check for effective ggh coupling in UFO.// | + | - ASK FOR FEYNRULES FILE! |
| - | - SM background generation. | + | - Validate UFO File {{ :2019:groups:higgs:alp-pr.tar.gz |ALP UFO file }} (fixed by Peter Richardson) from Bauer, Thamm, Neubert. **[JN, SW]** //NOTE: We need to check for effective ggh coupling in UFO.// (CHECKED: They Have it, so we can generate gluon fusion production of $h$) |
| - | - Generate signal: study kinematics of different $h$ production modes. | + | - SM background generation. **Done** **[SG,AL]** |
| - | - Other constraints. 1) LEP Z width: | + | - Generate signal: study kinematics of different $h$ production modes, as well as $m_{\phi}$ dependence.**[SG,AL]** |
| + | - Contur study (related to next item). Give **JB** range of parameters to scan for the model. | ||
| + | - Other constraints. 1) Higgs signal strengths bound on partial BSM width **[JN, SW]** 2) LEP Z width: Z → $h^*$ $\phi$, $h^*\to bb...$ leads to constraints from Z total width. **[JN, SW]** 3) LEP Exclusive Z decays? 4)... | ||
| - | * $\phi$ -> $\mu\mu$ | + | * $\phi$ -> $\mu\mu$ Possiblly useful refs ($h\to ZZ^*\to4\mu$[[https://cds.cern.ch/record/2621479/files/ATLAS-CONF-2018-018.pdf| ATLAS-CONF-2018-018]],[[https://cds.cern.ch/record/2668684/files/HIG-19-001-pas.pdf|CMS]]; $h\to aa\to4\mu$[[https://arxiv.org/abs/1812.00380|1812.00380]]; $h\to aa\to2\tau2\mu$ [[https://inspirehep.net/record/1419565/files/HIG-15-011-pas.pdf|HIG-15-011-pas]], [[https://arxiv.org/pdf/1505.01609.pdf|1505.01609]]; $h\to ZZ_d\to 4l$[[http://arxiv.org/abs/1802.03388|1802.03388]]) |
| Similar strategy to the one above! In principle above 10 GeV we are safe from SM low mass resonances. Below 10 GeV? Also, how low can one go in mass by playing with muon isolation. | Similar strategy to the one above! In principle above 10 GeV we are safe from SM low mass resonances. Below 10 GeV? Also, how low can one go in mass by playing with muon isolation. | ||
2019/groups/higgs/lightscalars/exotichdecays.1561378464.txt.gz · Last modified: 2019/06/24 14:14 by jose.miguel.no
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