Electroweak radiative corrections in precision LHC measurements of / +jets

Neda Darvishi (Department of Physics and Astronomy, Michigan State University, East Lansing, USA; Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing, China) ; M.R. Masouminia (Institute for Particle Physics Phenomenology, Durham University, Durham, United Kingdom)

We calculate the fiducial and differential W±/Z0+jet(s) production cross-sections in the presence of electroweak (EW) corrections through virtual loop contributions to the matrix elements (MEs) of the processes and real partonic cascade emissions. The calculations are carried out for proton-proton collisions at s=13 TeV, using Herwig 7 general-purpose Monte-Carlo event generator with leading-order or next-to-leading-order MEs that are interfaced with different parton-shower configurations. The results are compared with precision experimental measurements from ATLAS collaboration and with similar predictions within the kt-factorisation framework, providing a test for the validity of the newly-implemented QCD⊕QED⊕EW parton shower in Herwig 7. It is shown that the inclusion of EW radiations in the parton shower simulations improves Herwig 7's predictions in describing the experimental data. Additionally, the inclusion of parton shower-induced real EW emissions can take precedence over the incorporation of virtual EW corrections for the simulation of EW-sensitive events.

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      "full_name": "Masouminia, M.R.", 
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      "email": "mohammad.r.masouminia@durham.ac.uk"
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      "title": "Electroweak radiative corrections in precision LHC measurements of / +jets"
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      "value": "We calculate the fiducial and differential <math><msup><mrow><mi>W</mi></mrow><mrow><mo>\u00b1</mo></mrow></msup><mo>/</mo><msup><mrow><mi>Z</mi></mrow><mrow><mn>0</mn></mrow></msup><mo>+</mo><mi>j</mi><mi>e</mi><mi>t</mi><mo>(</mo><mi>s</mi><mo>)</mo></math> production cross-sections in the presence of electroweak (EW) corrections through virtual loop contributions to the matrix elements (MEs) of the processes and real partonic cascade emissions. The calculations are carried out for proton-proton collisions at <math><msqrt><mrow><mi>s</mi></mrow></msqrt><mo>=</mo><mn>13</mn></math> TeV, using Herwig 7 general-purpose Monte-Carlo event generator with leading-order or next-to-leading-order MEs that are interfaced with different parton-shower configurations. The results are compared with precision experimental measurements from ATLAS collaboration and with similar predictions within the <math><msub><mrow><mi>k</mi></mrow><mrow><mi>t</mi></mrow></msub></math>-factorisation framework, providing a test for the validity of the newly-implemented QCD\u2295QED\u2295EW parton shower in Herwig 7. It is shown that the inclusion of EW radiations in the parton shower simulations improves Herwig 7's predictions in describing the experimental data. Additionally, the inclusion of parton shower-induced real EW emissions can take precedence over the incorporation of virtual EW corrections for the simulation of EW-sensitive events."
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Published on:
23 November 2022
Publisher:
Elsevier
Published in:
Nuclear Physics B , Volume 985 C (2022)

Article ID: 116025
DOI:
https://doi.org/10.1016/j.nuclphysb.2022.116025
Copyrights:
The Author(s)
Licence:
CC-BY-3.0

Fulltext files: