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Advancing LHC probes of dark matter from the inert two-Higgs-doublet model with the monojet signal

Advancing LHC probes of dark matter from the inert two-Higgs-doublet model with the monojet signal
Advancing LHC probes of dark matter from the inert two-Higgs-doublet model with the monojet signal

The inert two-Higgs-doublet Model (i2HDM) is a well-motivated minimal consistent dark matter (DM) model, but it is rather challenging to test at the LHC in the parameter space allowed by relic density and DM direct detection constraints. This is especially true when considering the latest XENON 1T data on direct DM searches, which we use here to present the best current combined limit on the i2HDM parameter space. In this analysis, we present prospects to advance the exploitation of DM monojet signatures from the i2HDM at the LHC, by emphasising that a shape analysis of the missing transverse momentum distribution allows one to sizably improve the LHC discovery potential. For a key element of our analysis, we explore the validity of using an effective vertex, ggH, for the coupling of the Higgs boson to gluons using a full one-loop computation. We have found sizeable differences between the two approaches, especially in the high missing transverse momentum region, and incorporated the respective K-factors to obtain the correct kinematical distributions. As a result, we delineate a realistic search strategy and present the improved current and projected LHC sensitivity to the i2HDM parameter space.

2470-0010
1-19
Belyaev, A.
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
Moretti, S.
b57cf0f0-4bc3-4e02-96e3-071255366614
Fernandez Perez Tomei, T.R.
4d9db3e7-14c9-4786-8936-77edfdb26c77
Novaes, S. F.
e02ccce4-0ec9-4828-8602-d41a058381c2
Mercadante, P.G.
79e0c545-12f2-48f2-b643-81dcbe4dc8f7
Moon, C.S.
97fcf6aa-a407-4f88-ab72-d26fd0bf8559
Panizzi, L.
e8ade38e-ee5d-4e2d-8307-3286a8b92740
Rojas, F.
d22a3dcb-c0ee-4e1a-ab07-6b73ce4550cb
Thomas, M.
4565b5ac-e472-4a45-8215-04d715f52320
Belyaev, A.
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
Moretti, S.
b57cf0f0-4bc3-4e02-96e3-071255366614
Fernandez Perez Tomei, T.R.
4d9db3e7-14c9-4786-8936-77edfdb26c77
Novaes, S. F.
e02ccce4-0ec9-4828-8602-d41a058381c2
Mercadante, P.G.
79e0c545-12f2-48f2-b643-81dcbe4dc8f7
Moon, C.S.
97fcf6aa-a407-4f88-ab72-d26fd0bf8559
Panizzi, L.
e8ade38e-ee5d-4e2d-8307-3286a8b92740
Rojas, F.
d22a3dcb-c0ee-4e1a-ab07-6b73ce4550cb
Thomas, M.
4565b5ac-e472-4a45-8215-04d715f52320

Belyaev, A., Moretti, S., Fernandez Perez Tomei, T.R., Novaes, S. F., Mercadante, P.G., Moon, C.S., Panizzi, L., Rojas, F. and Thomas, M. (2019) Advancing LHC probes of dark matter from the inert two-Higgs-doublet model with the monojet signal. Physical Review D, 99 (1), 1-19. (doi:10.1103/PhysRevD.99.015011).

Record type: Article

Abstract

The inert two-Higgs-doublet Model (i2HDM) is a well-motivated minimal consistent dark matter (DM) model, but it is rather challenging to test at the LHC in the parameter space allowed by relic density and DM direct detection constraints. This is especially true when considering the latest XENON 1T data on direct DM searches, which we use here to present the best current combined limit on the i2HDM parameter space. In this analysis, we present prospects to advance the exploitation of DM monojet signatures from the i2HDM at the LHC, by emphasising that a shape analysis of the missing transverse momentum distribution allows one to sizably improve the LHC discovery potential. For a key element of our analysis, we explore the validity of using an effective vertex, ggH, for the coupling of the Higgs boson to gluons using a full one-loop computation. We have found sizeable differences between the two approaches, especially in the high missing transverse momentum region, and incorporated the respective K-factors to obtain the correct kinematical distributions. As a result, we delineate a realistic search strategy and present the improved current and projected LHC sensitivity to the i2HDM parameter space.

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PhysRevD.99.015011 - Version of Record
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Published date: 7 January 2019

Identifiers

Local EPrints ID: 428767
URI: https://eprints.soton.ac.uk/id/eprint/428767
ISSN: 2470-0010
PURE UUID: 525a63d9-a7fa-46bd-93e9-d497e0d901d2
ORCID for A. Belyaev: ORCID iD orcid.org/0000-0002-1733-4408

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Date deposited: 08 Mar 2019 17:30
Last modified: 15 Aug 2019 00:42

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