Measurement of $t$-channel single-top-quark production in $pp$ collisions at $\sqrt{s} = 5.02$ TeV with the ATLAS detector
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arXiv
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| Formato: | Preprint |
| Publicado: |
2023
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| _version_ | 1866915496175075328 |
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| author | ATLAS Collaboration |
| author_facet | ATLAS Collaboration |
| contents | The observation of the electroweak production of single-top-quarks is made using 255 $\text{pb}^{-1}$ of proton-proton collision data recorded at $\sqrt{s} = 5.02$ TeV with the ATLAS detector at the Large Hadron Collider. An event selection is used to identify single-top-quark candidates arising from $t$-channel production with the top quark decaying semi-leptonically. Events passing the selection are then used to measure the inclusive cross-section for the combined production of single-top-quarks and antiquarks, $σ({tq + \bar{t}q})$, and the ratio $R_t$ between these two. They are measured to be $σ({tq + \bar{t}q}) = 27.1^{+4.4}_{-4.1} (\text{stat.}) ^{+4.4}_{-3.7} (\text{syst.})$ pb and $R_t = 2.73^{+1.43}_{-0.82} (\text{stat.}) ^{+1.01}_{-0.29} (\text{syst.})$. The individual single-top-quark ($t q$) and single-top-antiquark ($\bar{t} q$) production cross-sections are measured to be $σ(t q) = 19.8^{+3.9}_{-3.1} (\text{stat.}) ^{+2.9}_{-2.2} (\text{syst.})$ pb and $σ(\bar{t}q) = 7.3^{+3.2}_{-2.1} (\text{stat.}) ^{+2.8}_{-1.5} (\text{syst.})$ pb. All measurements are in good agreement with the Standard Model predictions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_01518 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Measurement of $t$-channel single-top-quark production in $pp$ collisions at $\sqrt{s} = 5.02$ TeV with the ATLAS detector ATLAS Collaboration High Energy Physics - Experiment The observation of the electroweak production of single-top-quarks is made using 255 $\text{pb}^{-1}$ of proton-proton collision data recorded at $\sqrt{s} = 5.02$ TeV with the ATLAS detector at the Large Hadron Collider. An event selection is used to identify single-top-quark candidates arising from $t$-channel production with the top quark decaying semi-leptonically. Events passing the selection are then used to measure the inclusive cross-section for the combined production of single-top-quarks and antiquarks, $σ({tq + \bar{t}q})$, and the ratio $R_t$ between these two. They are measured to be $σ({tq + \bar{t}q}) = 27.1^{+4.4}_{-4.1} (\text{stat.}) ^{+4.4}_{-3.7} (\text{syst.})$ pb and $R_t = 2.73^{+1.43}_{-0.82} (\text{stat.}) ^{+1.01}_{-0.29} (\text{syst.})$. The individual single-top-quark ($t q$) and single-top-antiquark ($\bar{t} q$) production cross-sections are measured to be $σ(t q) = 19.8^{+3.9}_{-3.1} (\text{stat.}) ^{+2.9}_{-2.2} (\text{syst.})$ pb and $σ(\bar{t}q) = 7.3^{+3.2}_{-2.1} (\text{stat.}) ^{+2.8}_{-1.5} (\text{syst.})$ pb. All measurements are in good agreement with the Standard Model predictions. |
| title | Measurement of $t$-channel single-top-quark production in $pp$ collisions at $\sqrt{s} = 5.02$ TeV with the ATLAS detector |
| topic | High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2310.01518 |