Combination of Searches for Higgs Boson Pair Production in pp Collisions at $\sqrt{s}$=13 TeV with the ATLAS Detector
Articolo
Data di Pubblicazione:
2024
Abstract:
This Letter presents results from a combination of searches for Higgs boson pair production using 126–140 fb−1 of proton-proton collision data at s=13 TeV recorded with the ATLAS detector. At 95% confidence level (CL), the upper limit on the production rate is 2.9 times the standard model (SM) prediction, with an expected limit of 2.4 assuming no Higgs boson pair production. Constraints on the Higgs boson self-coupling modifier κλ=λHHH/λHHHSM, and the quartic HHVV coupling modifier κ2V=gHHVV/gHHVVSM, are derived individually, fixing the other parameter to its SM value. The observed 95% CL intervals are −1.2<κλ<7.2 and 0.6<κ2V<1.5, respectively, while the expected intervals are −1.6<κλ<7.2 and 0.4<κ2V<1.6 in the SM case. Constraints obtained for several interaction parameters within Higgs effective field theory are the strongest to date, offering insights into potential deviations from SM predictions.
© 2024 CERN, for the ATLAS Collaboration
2024
CERN
Tipologia CRIS:
03A-Articolo su Rivista
Elenco autori:
Georges Aad; Erlend Aakvaag; Braden Abbott; Sara Abdelhameed; Kira Abeling; Nils Julius Abicht; Syed Haider Abidi; Mohammed Abdelrazek Aboelela; Asmaa Aboulhorma ; Halina Abramowicz; Henso ABREU; Yiming Abulaiti; Bobby Acharya; Anke Ackermann; Claire Bourdarios; Leszek Adamczyk; Sagar Addepalli; Matthew Addison; Jahred Adelman; Aytul Adiguzel; Tim Adye; Anthony Affolder; Yoav Afik; Merve Nazlim Agaras; Jinky Agarwala; Anamika Aggarwal; Catalin AGHEORGHIESEI; Faig Ahmadov; waleed syed ahmed ; Sudha Ahuja; Xiaocong Ai; Giulio Aielli; Arya A; Malak AIT TAMLIHAT; Brahim Aitbenchikh; Melike Akbiyik; Torsten Akesson; Andrey Akimov; Daiya Akiyama; Nilima Akolkar; Sina Aktas; konie al khoury; Gian Luigi Alberghi; Justin Albert; Pietro Albicocco; Guillaume Albouy; Sara Alderweireldt; Zackary Alegria; Martin Aleksa; Igor Alexandrov; Calin Alexa; Riccardo Longo; et al.;
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