| Autor: |
Aad, Georges, Abbott, Brad, Abbott, Dale C., Abed Abud, Adam, Abeling, Kira, Abhayasinghe, Deshan Kavishka, Abidi, Syed Haider, AbouZeid, Ossama Sherif Alexander, Abraham, Nadine L., Abramowicz, Halina, Bjørke, Kristian, Bugge, Magnar Kopangen, Cameron, David Gordon, Catmore, James Richard, Garonne, Vincent, Gramstad, Eirik, Heggelund, Andreas, Hellesund, Simen, Håland, Even Simonsen, Morisbak, Vanja, Oppen, Henrik, Ould-Saada, Farid, Pedersen, Maiken, Read, Alexander Lincoln, Rye, Eli Bæverfjord, Røhne, Ole Myren, Sandaker, Heidi, Vadla, Knut Oddvar Høie, Buanes, Trygve, Djuvsland, Julia Isabell, Eigen, Gerald, Fomin, Nikolai, Latour, Bertrand Pascal Christian, Lee, Graham Richard, Lipniacka, Anna, Stugu, Bjarne Sandvik, Træet, Are Sivertsen, Abreu, Henso, Abulaiti, Yiming, Acharya, Bobby S., Achkar, Baida, Adam, Lennart, Adam-Bourdarios, Claire, Adamczyk, Leszek, Adamek, Lukas, Adelman, Jareed, Adigüzel, Aytül, Adorni, Sofia, Adye, Tim, Affolder, Anthony Allen, ATLAS, Collaboration |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
Physics Letters B |
| ISSN: |
0370-2693 |
| Popis: |
This letter reports the observation of photon-induced production of W -boson pairs, γγ → W W . The analysis uses 139 fb−1 of LHC proton–proton collision data taken at √s = 13 TeV recorded by the ATLAS experiment during the years 2015–2018. The measurement is performed selecting one electron and one muon, corresponding to the decay of the diboson system as W W → e±νμ∓ν final state. The background-only hypothesis is rejected with a significance of well above 5 standard deviations consistent with the expectation from Monte Carlo simulation. A cross section for the γγ → W W process of 3.13±0.31(stat.)±0.28(syst.) fb is measured in a fiducial volume close to the acceptance of the detector, by requiring an electron and a muon of opposite signs with large dilepton transverse momentum and exactly zero additional charged particles. This is found to be in agreement with the Standard Model prediction. publishedVersion |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect