Search for the exclusive $W$ boson hadronic decays $W^{\pm}\toπ^{\pm}γ$, $W^{\pm}\to K^{\pm}γ$ and $W^{\pm}\toρ^{\pm}γ$ with the ATLAS detector
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| Format: | Preprint |
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2023
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| _version_ | 1866916462487142400 |
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| author | ATLAS Collaboration |
| author_facet | ATLAS Collaboration |
| contents | A search for the exclusive hadronic decays $W^{\pm}\to π^{\pm}γ$, $W^{\pm}\to K^{\pm}γ$ and $W^{\pm}\to ρ^{\pm}γ$ is performed using up to $140\, \text{fb}^{-1}$ of proton-proton collisions recorded with the ATLAS detector at a center-of-mass energy of $\sqrt{s}=13\,\text{TeV}$. These rare processes provide a test bench for the quantum chromodynamics factorization formalism used to calculate cross sections at colliders, as well as a probe of $W$ boson coupling to quarks and a new way to measure the $W$ boson mass through fully reconstructed decay products. The search results in the most stringent upper limit to date on the branching fractions $\mathcal{B}(W^{\pm}\to π^{\pm}γ) < 1.9\times10^{-6}$, $\mathcal{B}(W^{\pm}\to K^{\pm}γ) < 1.7\times10^{-6}$, $\mathcal{B}(W^{\pm}\to ρ^{\pm}γ) < 5.2\times10^{-6}$ at 95% confidence level. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2309_15887 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Search for the exclusive $W$ boson hadronic decays $W^{\pm}\toπ^{\pm}γ$, $W^{\pm}\to K^{\pm}γ$ and $W^{\pm}\toρ^{\pm}γ$ with the ATLAS detector ATLAS Collaboration High Energy Physics - Experiment A search for the exclusive hadronic decays $W^{\pm}\to π^{\pm}γ$, $W^{\pm}\to K^{\pm}γ$ and $W^{\pm}\to ρ^{\pm}γ$ is performed using up to $140\, \text{fb}^{-1}$ of proton-proton collisions recorded with the ATLAS detector at a center-of-mass energy of $\sqrt{s}=13\,\text{TeV}$. These rare processes provide a test bench for the quantum chromodynamics factorization formalism used to calculate cross sections at colliders, as well as a probe of $W$ boson coupling to quarks and a new way to measure the $W$ boson mass through fully reconstructed decay products. The search results in the most stringent upper limit to date on the branching fractions $\mathcal{B}(W^{\pm}\to π^{\pm}γ) < 1.9\times10^{-6}$, $\mathcal{B}(W^{\pm}\to K^{\pm}γ) < 1.7\times10^{-6}$, $\mathcal{B}(W^{\pm}\to ρ^{\pm}γ) < 5.2\times10^{-6}$ at 95% confidence level. |
| title | Search for the exclusive $W$ boson hadronic decays $W^{\pm}\toπ^{\pm}γ$, $W^{\pm}\to K^{\pm}γ$ and $W^{\pm}\toρ^{\pm}γ$ with the ATLAS detector |
| topic | High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2309.15887 |