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2019:groups:higgs:lightscalars:exotichdecays [2019/06/24 11:44] jose.miguel.no |
2019:groups:higgs:lightscalars:exotichdecays [2019/06/24 16:34] 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 $\phi$: $\phi \to \gamma \gamma$, $\phi \to \mu \mu$ | ||
- | * $\phi$ -> $\gamma\gamma$. | + | * $\phi$ -> $\gamma\gamma$. (**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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$m_\phi > 35$ GeV: $h \to Z^* \phi$ ($h \to \ell\ell \phi$) | $m_\phi > 35$ GeV: $h \to Z^* \phi$ ($h \to \ell\ell \phi$) | ||
- | $h^* \to Z \phi$ [UFO files from effective ggh coupling for kinematics and rescale rate with ggF cross section?] | + | __TO DO LIST__ |
+ | - 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 $h$) | ||
+ | - SM background generation. **[SG,AL]** | ||
+ | - 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) LEP Z width: Z → $h^*$ $\phi$, $h^*\to bb...$ leads to constraints from Z total width. **[JN, SW]** 2) LEP Exclusive Z decays? 3)... | ||
+ | |||
* $\phi$ -> $\mu\mu$ | * $\phi$ -> $\mu\mu$ | ||