New Higgses at the Electroweak Scale and Differential $t\bar t$ Distributions
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866911887050932224 |
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| author | Crivellin, Andreas |
| author_facet | Crivellin, Andreas |
| contents | Indications for new Higgs bosons at 95\,GeV and 152\,GeV with significance of 3.8$σ$ and $4.3σ$, respectively, have been obtained. While the former contains the inclusive $γγ$ channel, the latter is obtained by combining several modes of associated di-photon production, i.e. $γγ+X$ with $X=\ell,\,\ell b,\,{\rm MET},\,τ,\,...$, within the $Δ$SM (the Standard Model extended by a real triplet). Such a triplet predicts a positive definite shift in the $W$ mass, in agreement with the current global electroweak fit, and its neutral component decays dominantly to $W$ bosons (for small mixing angles). This offers a connection to $t\bar t$ differential distributions whose experimental signature is $WW b\bar b$: A simplified model with a new scalar $H$, produced via gluon fusion and decaying to $S$ and $S^\prime$ with subsequent (dominant) decays to $WW$ and $b\bar b$, respectively, has the same final state. In fact, adding this new physics polution to the Standard Model describes the leptonic $t\bar t$ distributions better by at least $5.8σ$. Furthermore, assuming that $S^\prime$ is an $SU(2)_L$ singlet, the resulting di-photon signal strength is compatible with the 95\,GeV $γγ$ measurements. A possible UV completion of this simplified model is the $Δ$2HDMS, i.e. a 2HDM supplemented with a singlet and a real triplet, which can successfully accommodate electroweak scale Baryogenesis. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_15933 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | New Higgses at the Electroweak Scale and Differential $t\bar t$ Distributions Crivellin, Andreas High Energy Physics - Phenomenology High Energy Physics - Experiment Indications for new Higgs bosons at 95\,GeV and 152\,GeV with significance of 3.8$σ$ and $4.3σ$, respectively, have been obtained. While the former contains the inclusive $γγ$ channel, the latter is obtained by combining several modes of associated di-photon production, i.e. $γγ+X$ with $X=\ell,\,\ell b,\,{\rm MET},\,τ,\,...$, within the $Δ$SM (the Standard Model extended by a real triplet). Such a triplet predicts a positive definite shift in the $W$ mass, in agreement with the current global electroweak fit, and its neutral component decays dominantly to $W$ bosons (for small mixing angles). This offers a connection to $t\bar t$ differential distributions whose experimental signature is $WW b\bar b$: A simplified model with a new scalar $H$, produced via gluon fusion and decaying to $S$ and $S^\prime$ with subsequent (dominant) decays to $WW$ and $b\bar b$, respectively, has the same final state. In fact, adding this new physics polution to the Standard Model describes the leptonic $t\bar t$ distributions better by at least $5.8σ$. Furthermore, assuming that $S^\prime$ is an $SU(2)_L$ singlet, the resulting di-photon signal strength is compatible with the 95\,GeV $γγ$ measurements. A possible UV completion of this simplified model is the $Δ$2HDMS, i.e. a 2HDM supplemented with a singlet and a real triplet, which can successfully accommodate electroweak scale Baryogenesis. |
| title | New Higgses at the Electroweak Scale and Differential $t\bar t$ Distributions |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2405.15933 |