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Mixed QCD-electroweak corrections to on-shell Z production at the LHC
We present the first complete calculation of mixed QCD-electroweak corrections to the production of on-shell Z bosons in hadron collisions and their decays to massless charged leptons. Our computation is fully differential with respect to final state QCD partons and resolved photons, allowing us to...
| Autores principales: | , , , , , |
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| Lenguaje: | eng |
| Publicado: |
2020
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1016/j.physletb.2020.135969 http://cds.cern.ch/record/2718771 |
| _version_ | 1780965662177361920 |
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| author | Buccioni, Federico Caola, Fabrizio Delto, Maximilian Jaquier, Matthieu Melnikov, Kirill Röntsch, Raoul |
| author_facet | Buccioni, Federico Caola, Fabrizio Delto, Maximilian Jaquier, Matthieu Melnikov, Kirill Röntsch, Raoul |
| author_sort | Buccioni, Federico |
| collection | CERN |
| description | We present the first complete calculation of mixed QCD-electroweak corrections to the production of on-shell Z bosons in hadron collisions and their decays to massless charged leptons. Our computation is fully differential with respect to final state QCD partons and resolved photons, allowing us to compute any infra-red safe observable pertinent to the pp→Z→l+l− process in the approximation that the Z boson is on shell. Although mixed QCD-electroweak corrections are small, at about the per mill level, we observe that the interplay between QCD-QED and QCD-weak contributions is subtle and observable-dependent. It is therefore not possible to avoid computing one or the other if O(αEWαs) precision is desired. |
| id | cern-2718771 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2020 |
| record_format | invenio |
| spelling | cern-27187712022-05-04T05:38:01Zdoi:10.1016/j.physletb.2020.135969http://cds.cern.ch/record/2718771engBuccioni, FedericoCaola, FabrizioDelto, MaximilianJaquier, MatthieuMelnikov, KirillRöntsch, RaoulMixed QCD-electroweak corrections to on-shell Z production at the LHChep-exParticle Physics - Experimenthep-phParticle Physics - PhenomenologyWe present the first complete calculation of mixed QCD-electroweak corrections to the production of on-shell Z bosons in hadron collisions and their decays to massless charged leptons. Our computation is fully differential with respect to final state QCD partons and resolved photons, allowing us to compute any infra-red safe observable pertinent to the pp→Z→l+l− process in the approximation that the Z boson is on shell. Although mixed QCD-electroweak corrections are small, at about the per mill level, we observe that the interplay between QCD-QED and QCD-weak contributions is subtle and observable-dependent. It is therefore not possible to avoid computing one or the other if O(αEWαs) precision is desired.We present the first complete calculation of mixed QCD-electroweak corrections to the production of on-shell $Z$ bosons in hadron collisions and their decays to massless charged leptons. Our computation is fully differential with respect to final state QCD partons and resolved photons, allowing us to compute any infra-red safe observable pertinent to the $pp \to Z \to l^+ l^-$ process in the approximation that the $Z$ boson is on shell. Although mixed QCD-electroweak corrections are small, at about the per mill level, we observe that the interplay between QCD-QED and QCD-weak contributions is subtle and observable-dependent. It is therefore not possible to avoid computing one or the other if ${\cal O}(\alpha_{EW} \alpha_s)$ precision is desired.arXiv:2005.10221OUTP-20-04P,TTP20-021P3H-20-019CERN-TH-2020-072oai:cds.cern.ch:27187712020-05-20 |
| spellingShingle | hep-ex Particle Physics - Experiment hep-ph Particle Physics - Phenomenology Buccioni, Federico Caola, Fabrizio Delto, Maximilian Jaquier, Matthieu Melnikov, Kirill Röntsch, Raoul Mixed QCD-electroweak corrections to on-shell Z production at the LHC |
| title | Mixed QCD-electroweak corrections to on-shell Z production at the LHC |
| title_full | Mixed QCD-electroweak corrections to on-shell Z production at the LHC |
| title_fullStr | Mixed QCD-electroweak corrections to on-shell Z production at the LHC |
| title_full_unstemmed | Mixed QCD-electroweak corrections to on-shell Z production at the LHC |
| title_short | Mixed QCD-electroweak corrections to on-shell Z production at the LHC |
| title_sort | mixed qcd-electroweak corrections to on-shell z production at the lhc |
| topic | hep-ex Particle Physics - Experiment hep-ph Particle Physics - Phenomenology |
| url | https://dx.doi.org/10.1016/j.physletb.2020.135969 http://cds.cern.ch/record/2718771 |
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