Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/126347
Citations | ||
Scopus | Web of Science® | Altmetric |
---|---|---|
?
|
?
|
Type: | Journal article |
Title: | Search for the Higgs boson produced in association with a vector boson and decaying into two spin-zero particles in the H → aa → 4b channel in pp collisions at √s = 13 TeV with the ATLAS detector |
Other Titles: | Search for the Higgs boson produced in association with a vector boson and decaying into two spin-zero particles in the H → aa → 4b channel in pp collisions at root s = 13 TeV with the ATLAS detector |
Author: | Aaboud, M. Aad, G. Abbott, B. Abdinov, O. Abeloos, B. Abhayasinghe, D.K. Abidi, S.H. AbouZeid, O.S. Abraham, N.L. Abramowicz, H. Abreu, H. Abulaiti, Y. Acharya, B.S. Adachi, S. Adamczyk, L. Adelman, J. Adersberger, M. Adiguzel, A. Adye, T. Affolder, A.A. et al. |
Citation: | The Journal of High Energy Physics, 2018; 2018(10):031[i],1-031-47 |
Publisher: | Springer Nature |
Issue Date: | 2018 |
ISSN: | 1126-6708 1029-8479 |
Statement of Responsibility: | M. Aaboud … D. Duvnjak … P. Jackson … J.L. Oliver … A. Petridis … A. Qureshi … A.S. Sharma … M.J. White … et al. [The ATLAS Collaboration] |
Abstract: | A search for exotic decays of the Higgs boson into a pair of spin-zero particles, H → aa, where the a-boson decay sin to b-quarks promptly or with a mean proper lifetime cτₐ up to 6 mm and has a mass in the range of 20–60 GeV, is presented. The search is performed in events where the Higgs boson is produced in association with a W or Z boson, giving rise to a signature of one or two charged leptons (electrons or muons) and multiple jets from b-quark decays. The analysis is based on the dataset of proton-proton collisions at s√=13 TeV recorded in 2015 and 2016 by the ATLAS detector at the CERN Large Hadron Collider, corresponding to an integrated luminosity of 36.1 fb⁻¹. No significant excess of events above the Standard Model background prediction is observed, and 95% confidence-level upper limits are derived for the production cross-sections for pp → WH, ZH and their combination, times the branching ratio of the decay chain H → aa → 4b. For a-bosons which decay promptly, the upper limit on the combination of cross-sections for WH and ZH times the branching ratio of H → aa → 4b ranges from 3.0 pb for ma = 20 GeV to 1.3 pb for mₐ = 60 GeV, assuming that the ratio of WH to ZH cross-sections follows the Standard Model prediction. For a-bosons with longer proper lifetimes, the most stringent limits are 1.8 pb and 0.68 pb, respectively, at cτa ∼ 0.4 mm. |
Keywords: | Beyond Standard Model, hadron-hadron scattering (experiments), Higgs physics |
Rights: | Copyright CERN, for the benefit of the ATLAS Collaboration. Article funded by SCOAP³. Open Access. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited. |
DOI: | 10.1007/JHEP10(2018)031 |
Grant ID: | ARC |
Published version: | http://dx.doi.org/10.1007/jhep10(2018)031 |
Appears in Collections: | Aurora harvest 4 Physics publications |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
hdl_126347.pdf | Published version | 940.54 kB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.