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Article: Search for the Higgs boson produced in association with a vector boson and decaying in1to two spin-zero particles in the H → aa → 4b channel in pp collisions at √s = 13 TeV with the ATLAS detector
Title | Search for the Higgs boson produced in association with a vector boson and decaying in1to two spin-zero particles in the H → aa → 4b channel in pp collisions at √s = 13 TeV with the ATLAS detector |
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Authors | |
Keywords | Beyond Standard Model Hadron-Hadron scattering (experiments) Higgs physics |
Issue Date | 2018 |
Publisher | Springer Verlag (Germany): SCOAP3. The Journal's web site is located at http://www.springer.com/physics/particle+and+nuclear+physics/journal/13130 |
Citation | Journal of High Energy Physics, 2018, v. 2018 n. 10, article no. 31, p. 1-48 How to Cite? |
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.
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Persistent Identifier | http://hdl.handle.net/10722/265956 |
ISSN | 2012 Impact Factor: 5.618 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Lo, CY | - |
dc.contributor.author | Orlando, N | - |
dc.contributor.author | Paredes Hernandez, DK | - |
dc.contributor.author | Tu, Y | - |
dc.date.accessioned | 2018-12-17T02:16:22Z | - |
dc.date.available | 2018-12-17T02:16:22Z | - |
dc.date.issued | 2018 | - |
dc.identifier.citation | Journal of High Energy Physics, 2018, v. 2018 n. 10, article no. 31, p. 1-48 | - |
dc.identifier.issn | 1126-6708 | - |
dc.identifier.uri | http://hdl.handle.net/10722/265956 | - |
dc.description.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. Open image in new window | - |
dc.language | eng | - |
dc.publisher | Springer Verlag (Germany): SCOAP3. The Journal's web site is located at http://www.springer.com/physics/particle+and+nuclear+physics/journal/13130 | - |
dc.relation.ispartof | Journal of High Energy Physics | - |
dc.rights | The final publication is available at Springer via http://dx.doi.org/10.1007/JHEP10(2018)031 | - |
dc.rights | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. | - |
dc.subject | Beyond Standard Model | - |
dc.subject | Hadron-Hadron scattering (experiments) | - |
dc.subject | Higgs physics | - |
dc.title | Search for the Higgs boson produced in association with a vector boson and decaying in1to two spin-zero particles in the H → aa → 4b channel in pp collisions at √s = 13 TeV with the ATLAS detector | - |
dc.type | Article | - |
dc.identifier.email | Orlando, N: norlando@HKUCC-COM.hku.hk | - |
dc.identifier.email | Paredes Hernandez, DK: dparedes@hku.hk | - |
dc.identifier.email | Tu, Y: yanjuntu@hku.hk | - |
dc.identifier.authority | Tu, Y=rp01971 | - |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.1007/JHEP10(2018)031 | - |
dc.identifier.scopus | eid_2-s2.0-85054663975 | - |
dc.identifier.hkuros | 296233 | - |
dc.identifier.volume | 2018 | - |
dc.identifier.issue | 10 | - |
dc.identifier.spage | article no. 31, p. 1 | - |
dc.identifier.epage | 48 | - |
dc.identifier.isi | WOS:000447257400001 | - |
dc.publisher.place | Germany | - |
dc.identifier.issnl | 1029-8479 | - |