Direct constraint on the Higgs-charm coupling from a search for Higgs boson decays into charm quarks with the ATLAS detector
A search for the Higgs boson decaying into a pair of charm quarks is presented. The analysis uses proton-proton collisions to target the production of a Higgs boson in association with a leptonically decaying W or Z boson. The dataset delivered by the LHC at a centre-of-mass energy of and recorded b...
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
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18 August 2022
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| In: |
The European physical journal. C, Particles and fields
Year: 2022, Jahrgang: 82, Heft: 8, Pages: 1-42 |
| ISSN: | 1434-6052 |
| DOI: | 10.1140/epjc/s10052-022-10588-3 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.1140/epjc/s10052-022-10588-3 Verlag, kostenfrei, Volltext: https://link.springer.com/article/10.1140/epjc/s10052-022-10588-3 
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| Verfasserangaben: | ATLAS Collaboration |
MARC
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| 245 | 1 | 0 | |a Direct constraint on the Higgs-charm coupling from a search for Higgs boson decays into charm quarks with the ATLAS detector |c ATLAS Collaboration |
| 264 | 1 | |c 18 August 2022 | |
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| 500 | |a Gesehen am 05.12.2022 | ||
| 500 | |a ATLAS Collaboration: G. Aad, B. Abbott, D.C. Abbott, A. Abed Abud, K. Abeling, D.K. Abhayasinghe, S.H. Abidi, A. Aboulhorma, H. Abramowicz, H. Abreu, Y. Abulaiti, A.C. Abusleme Hoffman, B.S. Acharya, B. Achkar, L. Adam, C. Adam Bourdarios, L. Adamczyk, L. Adamek, S.V. Addepalli, J. Adelman, A. Adiguzel, S. Adorni, T. Adye [und viele weitere] | ||
| 520 | |a A search for the Higgs boson decaying into a pair of charm quarks is presented. The analysis uses proton-proton collisions to target the production of a Higgs boson in association with a leptonically decaying W or Z boson. The dataset delivered by the LHC at a centre-of-mass energy of and recorded by the ATLAS detector corresponds to an integrated luminosity of 139 $$\text{ fb}^{-1}$$. Flavour-tagging algorithms are used to identify jets originating from the hadronisation of charm quarks. The analysis method is validated with the simultaneous measurement of WW, WZ and ZZ production, with observed (expected) significances of 2.6 (2.2) standard deviations above the background-only prediction for the $$(W/Z)Z(\rightarrow c{\bar{c}})$$process and 3.8 (4.6) standard deviations for the $$(W/Z)W(\rightarrow cq)$$process. The $$(W/Z)H(\rightarrow c {\bar{c}})$$search yields an observed (expected) upper limit of 26 (31) times the predicted Standard Model cross-section times branching fraction for a Higgs boson with a mass of , corresponding to an observed (expected) constraint on the charm Yukawa coupling modifier $$|\kappa _c| < 8.5~(12.4)$$, at the 95% confidence level. A combination with the ATLAS $$(W/Z)H, H\rightarrow b{\bar{b}}$$analysis is performed, allowing the ratio $$\kappa _c / \kappa _b$$to be constrained to less than 4.5 at the 95% confidence level, smaller than the ratio of the b- and c-quark masses, and therefore determines the Higgs-charm coupling to be weaker than the Higgs-bottom coupling at the 95% confidence level. | ||
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