Measurement of the cross-section for the production of a $W$ boson in association with $b$-jets in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866913172672217088 |
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| author | ATLAS Collaboration |
| author_facet | ATLAS Collaboration |
| contents | This paper presents a measurement of the production cross-section of a $W$ boson associated with one or two jets, where at least one jet originates from a $b$-quark. The data are collected with the ATLAS detector at the LHC in proton-proton collisions at $\sqrt{s}=13$ TeV, corresponding to an integrated luminosity of 140 fb$^{\text -1}$. Differential cross-sections are presented as a function of the transverse momentum of the $b$-jet for both the electron and muon decay modes of the $W$ boson. The results corrected for all detector effects are presented in a fiducial region defined with basic lepton and jet kinematics, and compared with theoretical predictions. The averaged fiducial cross-section of $W+b$-jets for the electron and muon channels is measured to be $16.6\pm1.9$ pb, which is consistent with the next-to-leading-order QCD prediction of $16.8\pm2.3$ pb. The relative precision of this measurement is improved by approximately a factor of two compared with the previous ATLAS measurement at $\sqrt{s}=7$ TeV. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_31205 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Measurement of the cross-section for the production of a $W$ boson in association with $b$-jets in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector ATLAS Collaboration High Energy Physics - Experiment This paper presents a measurement of the production cross-section of a $W$ boson associated with one or two jets, where at least one jet originates from a $b$-quark. The data are collected with the ATLAS detector at the LHC in proton-proton collisions at $\sqrt{s}=13$ TeV, corresponding to an integrated luminosity of 140 fb$^{\text -1}$. Differential cross-sections are presented as a function of the transverse momentum of the $b$-jet for both the electron and muon decay modes of the $W$ boson. The results corrected for all detector effects are presented in a fiducial region defined with basic lepton and jet kinematics, and compared with theoretical predictions. The averaged fiducial cross-section of $W+b$-jets for the electron and muon channels is measured to be $16.6\pm1.9$ pb, which is consistent with the next-to-leading-order QCD prediction of $16.8\pm2.3$ pb. The relative precision of this measurement is improved by approximately a factor of two compared with the previous ATLAS measurement at $\sqrt{s}=7$ TeV. |
| title | Measurement of the cross-section for the production of a $W$ boson in association with $b$-jets in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector |
| topic | High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2605.31205 |