dc.contributor.author Roloff, Philipp dc.contributor.author Schnoor, Ulrike dc.contributor.author Simoniello, Rosa dc.contributor.author Xu, Boruo dc.date.accessioned 2020-12-22T19:01:40Z dc.date.available 2020-12-22T19:01:40Z dc.date.issued 2020-11 dc.date.submitted 2019-12-17 dc.identifier.issn 1434-6044 dc.identifier.other s10052-020-08567-7 dc.identifier.other 8567 dc.identifier.uri https://www.repository.cam.ac.uk/handle/1810/315484 dc.description.abstract AbstractThe Compact Linear Collider (CLIC) is a future electron–positron collider that will allow measurements of the trilinear Higgs self-coupling in double Higgs boson events produced at its high-energy stages with collision energies from $$\sqrt{s}$$ s  = 1.4 to 3 TeV. The sensitivity to the Higgs self-coupling is driven by the measurements of the cross section and the invariant mass distribution of the Higgs-boson pair in the W-boson fusion process, $$\text {e}^{+}\text {e}^{-}\rightarrow {\text {H}\text {H}\nu \bar{\nu }}$$ e + e - HH ν ν ¯ . It is enhanced by including the cross-section measurement of ZHH production at 1.4 TeV. The expected sensitivity of CLIC for Higgs pair production through W-boson fusion is studied for the decay channels $$\mathrm{b}\bar{\mathrm{b}}\mathrm{b}\bar{\mathrm{b}}$$ b b ¯ b b ¯   and $$\mathrm{b}\bar{\mathrm{b}}\mathrm{W}\mathrm{W}^{*}$$ b b ¯ W W   using full detector simulation including all relevant backgrounds at $$\sqrt{s}$$ s = 1.4 TeV with an integrated luminosity of $$\mathcal {L}$$ L  = 2.5 ab$$^{-1}$$ - 1 and at $$\sqrt{s}$$ s = 3 TeV with $$\mathcal {L}$$ L  = 5 ab$$^{-1}$$ - 1 . Combining $$\text {e}^{+}\text {e}^{-}\rightarrow {\text {H}\text {H}\nu \bar{\nu }}$$ e + e - HH ν ν ¯ and ZHH  cross-section measurements at 1.4 TeV with differential measurements in $$\text {e}^{+}\text {e}^{-}\rightarrow {\text {H}\text {H}\nu \bar{\nu }}$$ e + e - HH ν ν ¯ events at 3 TeV, CLIC will be able to measure the trilinear Higgs self-coupling with a relative uncertainty of $$-8\%$$ - 8 % and $$+11\%$$ + 11 % at 68% C.L., assuming the Standard Model. In addition, prospects for simultaneous constraints on the trilinear Higgs self-coupling and the Higgs-gauge coupling HHWW are derived based on the $${\text {H}\text {H}\nu \bar{\nu }}$$ HH ν ν ¯ measurement. dc.language en dc.publisher Springer Science and Business Media LLC dc.rights Attribution 4.0 International (CC BY 4.0) dc.rights.uri https://creativecommons.org/licenses/by/4.0/ dc.subject Regular Article – Experimental Physics dc.title Double Higgs boson production and Higgs self-coupling extraction at CLIC dc.type Article dc.date.updated 2020-12-22T19:01:40Z prism.issueIdentifier 11 prism.publicationName The European Physical Journal C prism.volume 80 dc.identifier.doi 10.17863/CAM.62591 dcterms.dateAccepted 2020-10-18 rioxxterms.versionofrecord 10.1140/epjc/s10052-020-08567-7 rioxxterms.version VoR rioxxterms.licenseref.uri http://creativecommons.org/licenses/by/4.0/ dc.contributor.orcid Roloff, Philipp [0000-0001-7378-4350] dc.contributor.orcid Schnoor, Ulrike [0000-0002-2237-384X] dc.contributor.orcid Simoniello, Rosa [0000-0003-2042-6394] dc.identifier.eissn 1434-6052 cam.issuedOnline 2020-11-02
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