Higgs interference effects at the one-loop level in the 1-Higgs-Singlet extension of the Standard Model. / Kauer, Nikolas; Lind, Alexander; Maierhofer, Philipp; Song, Weimin.

In: Journal of High Energy Physics, Vol. 2019, 108, 07.2019, p. 1-43.

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Higgs interference effects at the one-loop level in the 1-Higgs-Singlet extension of the Standard Model. / Kauer, Nikolas; Lind, Alexander; Maierhofer, Philipp; Song, Weimin.

In: Journal of High Energy Physics, Vol. 2019, 108, 07.2019, p. 1-43.

Research output: Contribution to journalArticle

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Kauer, Nikolas ; Lind, Alexander ; Maierhofer, Philipp ; Song, Weimin. / Higgs interference effects at the one-loop level in the 1-Higgs-Singlet extension of the Standard Model. In: Journal of High Energy Physics. 2019 ; Vol. 2019. pp. 1-43.

BibTeX

@article{66f0b3ce3e5b4b839d38ddb5e2a934e0,
title = "Higgs interference effects at the one-loop level in the 1-Higgs-Singlet extension of the Standard Model",
abstract = "A detailed study of Higgs interference effects at the one-loop level in the 1-Higgs-Singlet extension of the Standard Model (1HSM) is presented for the WW and tt decay modes with fully leptonic WW decay. We explore interference effects for benchmark points with a heavy Higgs mass that significantly exceeds 2*m_t. In the WW channel, the Higgs signal and the interfering continuum background are loop induced. In the tt channel, which features a tree-level background, we also calculate the interference with the one-loop background, which, due to the appearance of the absorptive part, is found to dominate the normalisation and shape of differential Higgs cross section distributions and should therefore be considered in experimental analyses. The commonly used geometric average K-factor approximation K_interference ~ (K_Higgs*K_background)^(1/2) is not appropriate. We calculate with massive top and bottom quarks. Our 1HSM and SM implementation in Sherpa+OpenLoops is publicly available and can be used as parton-level integrator or event generator. ",
author = "Nikolas Kauer and Alexander Lind and Philipp Maierhofer and Weimin Song",
year = "2019",
month = jul
doi = "10.1007/JHEP07(2019)108",
language = "English",
volume = "2019",
pages = "1--43",
journal = "Journal of High Energy Physics",
issn = "1126-6708",
publisher = "Springer Verlag",

}

RIS

TY - JOUR

T1 - Higgs interference effects at the one-loop level in the 1-Higgs-Singlet extension of the Standard Model

AU - Kauer, Nikolas

AU - Lind, Alexander

AU - Maierhofer, Philipp

AU - Song, Weimin

PY - 2019/7

Y1 - 2019/7

N2 - A detailed study of Higgs interference effects at the one-loop level in the 1-Higgs-Singlet extension of the Standard Model (1HSM) is presented for the WW and tt decay modes with fully leptonic WW decay. We explore interference effects for benchmark points with a heavy Higgs mass that significantly exceeds 2*m_t. In the WW channel, the Higgs signal and the interfering continuum background are loop induced. In the tt channel, which features a tree-level background, we also calculate the interference with the one-loop background, which, due to the appearance of the absorptive part, is found to dominate the normalisation and shape of differential Higgs cross section distributions and should therefore be considered in experimental analyses. The commonly used geometric average K-factor approximation K_interference ~ (K_Higgs*K_background)^(1/2) is not appropriate. We calculate with massive top and bottom quarks. Our 1HSM and SM implementation in Sherpa+OpenLoops is publicly available and can be used as parton-level integrator or event generator.

AB - A detailed study of Higgs interference effects at the one-loop level in the 1-Higgs-Singlet extension of the Standard Model (1HSM) is presented for the WW and tt decay modes with fully leptonic WW decay. We explore interference effects for benchmark points with a heavy Higgs mass that significantly exceeds 2*m_t. In the WW channel, the Higgs signal and the interfering continuum background are loop induced. In the tt channel, which features a tree-level background, we also calculate the interference with the one-loop background, which, due to the appearance of the absorptive part, is found to dominate the normalisation and shape of differential Higgs cross section distributions and should therefore be considered in experimental analyses. The commonly used geometric average K-factor approximation K_interference ~ (K_Higgs*K_background)^(1/2) is not appropriate. We calculate with massive top and bottom quarks. Our 1HSM and SM implementation in Sherpa+OpenLoops is publicly available and can be used as parton-level integrator or event generator.

U2 - 10.1007/JHEP07(2019)108

DO - 10.1007/JHEP07(2019)108

M3 - Article

VL - 2019

SP - 1

EP - 43

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

SN - 1126-6708

M1 - 108

ER -