Search for Higgs boson decays into two neutral scalars with unequal masses in final states with b quarks and tau leptons in proton-proton collisions at $\sqrt{s}$ = 13 TeV
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| Format: | Preprint |
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2026
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| _version_ | 1866909055175360512 |
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| author | CMS Collaboration |
| author_facet | CMS Collaboration |
| contents | A search for Higgs boson (H) decays into a pair of neutral scalars $ϕ_1$ and $ϕ_2$, with $ϕ_2$ heavier than $ϕ_1$, is performed in final states with b quarks and tau leptons. Depending on the masses of the neutral scalars, $ϕ_2$ can undergo a cascade decay into $ϕ_1ϕ_1$. For both the cascade and non-cascade scenarios, one $ϕ_1$ is required to decay to a pair of tau leptons. Proton-proton collision data corresponding to an integrated luminosity of 138 fb$^{-1}$ collected with the CMS detector at the LHC at $\sqrt{s}$ = 13 TeV are analyzed. No statistically significant excess over the standard model expectation is observed. Upper limits are set on the products $σ\mathcal{B}$(H $\to$ $ϕ_1ϕ_2$ $\to$ 3$ϕ_1$ $\to$ 2$τ$4b) and $σ\mathcal{B}$(H $\to$ $ϕ_1ϕ_2$) $\mathcal{B}$($ϕ_1$ $\to$ 2$τ$) $\mathcal{B}$($ϕ_2$ $\to$ 2b) where $σ$ is the Higgs boson production cross section. The observed upper limits range between 0.9 and 36.8 pb at 95% confidence level, depending on the mass hypothesis and decay scenario. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2605_19144 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Search for Higgs boson decays into two neutral scalars with unequal masses in final states with b quarks and tau leptons in proton-proton collisions at $\sqrt{s}$ = 13 TeV CMS Collaboration High Energy Physics - Experiment A search for Higgs boson (H) decays into a pair of neutral scalars $ϕ_1$ and $ϕ_2$, with $ϕ_2$ heavier than $ϕ_1$, is performed in final states with b quarks and tau leptons. Depending on the masses of the neutral scalars, $ϕ_2$ can undergo a cascade decay into $ϕ_1ϕ_1$. For both the cascade and non-cascade scenarios, one $ϕ_1$ is required to decay to a pair of tau leptons. Proton-proton collision data corresponding to an integrated luminosity of 138 fb$^{-1}$ collected with the CMS detector at the LHC at $\sqrt{s}$ = 13 TeV are analyzed. No statistically significant excess over the standard model expectation is observed. Upper limits are set on the products $σ\mathcal{B}$(H $\to$ $ϕ_1ϕ_2$ $\to$ 3$ϕ_1$ $\to$ 2$τ$4b) and $σ\mathcal{B}$(H $\to$ $ϕ_1ϕ_2$) $\mathcal{B}$($ϕ_1$ $\to$ 2$τ$) $\mathcal{B}$($ϕ_2$ $\to$ 2b) where $σ$ is the Higgs boson production cross section. The observed upper limits range between 0.9 and 36.8 pb at 95% confidence level, depending on the mass hypothesis and decay scenario. |
| title | Search for Higgs boson decays into two neutral scalars with unequal masses in final states with b quarks and tau leptons in proton-proton collisions at $\sqrt{s}$ = 13 TeV |
| topic | High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2605.19144 |