Search for the Standard Model Higgs boson decaying into bb[bar] produced in association with top quarks decaying hadronically in pp collisions at √s = 8 TeV with the ATLAS detector
A search for Higgs boson production in association with a pair of top quarks (tt¯H$$ t\overline{t}H $$) is performed, where the Higgs boson decays to bb¯$$ b\overline{b} $$, and both top quarks decay hadronically. The data used correspond to an integrated luminosity of 20.3 fb−1 of pp collisions at...
Enregistré dans:
| Auteurs principaux: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Collectivité auteur: | |
| Format: | Article (Journal) |
| Langue: | anglais |
| Publié: |
27 May 2016
|
| In: |
Journal of high energy physics
Year: 2016, Numéro: 5 |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/JHEP05(2016)160 |
| Accès en ligne: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1007/JHEP05(2016)160
|
| Notes sur l'auteur: | The ATLAS Collaboration* |
| Résumé: | A search for Higgs boson production in association with a pair of top quarks (tt¯H$$ t\overline{t}H $$) is performed, where the Higgs boson decays to bb¯$$ b\overline{b} $$, and both top quarks decay hadronically. The data used correspond to an integrated luminosity of 20.3 fb−1 of pp collisions at s=8$$ \sqrt{s}=8 $$TeV collected with the ATLAS detector at the Large Hadron Collider. The search selects events with at least six energetic jets and uses a boosted decision tree algorithm to discriminate between signal and Standard Model background. The dominant multijet background is estimated using a dedicated data-driven technique. For a Higgs boson mass of 125 GeV, an upper limit of 6.4 (5.4) times the Standard Model cross section is observed (expected) at 95% confidence level. The best-fit value for the signal strength is μ = 1.6 ± 2.6 times the Standard Model expectation for mH = 125 GeV. Combining all tt¯H$$ t\overline{t}H $$searches carried out by ATLAS at s=8$$ \sqrt{s}=8 $$and 7 TeV, an observed (expected) upper limit of 3.1 (1.4) times the Standard Model expectation is obtained at 95% confidence level, with a signal strength μ = 1.7 ± 0.8. |
|---|---|
| Description: | *The ATLAS Collaboration: G. Aad, C.F. Anders, V. Andrei, A.E. Baas, O. Brandt, J.I. Djuvsland, M. Dunford, D.E. Ferreira de Lima, M.P. Geisler, M. Giulini, P. Hanke, J. Jongmanns, E.-E. Kluge, M. Kolb, M. Kretz, A. Kugel, V.S. Lang, M. Lisovyi, K. Meier, H. Meyer zu Theenhausen, D.I. Narrias Villar, V. Radescu, M. Sahinsoy, S. Schaetzel, V. Scharf, A. Schoening, H.-C. Schultz-Coulon, D. Sosa, R. Stamen, P. Starovoitov, S. Suchek, M. Wessels [und sehr viele weitere Personen] Im Titel steht der Buchstabe b mit einem Oberstrich Im Titel steht der Buchstabe s unter dem Wurzelsymbol Gesehen am 28.05.2020 |
| Description matérielle: | Online Resource |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/JHEP05(2016)160 |