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Higgs pair production at NLO QCD for CP-violating Higgs sectors

Gröber, R.; Mühlleitner, M. 1; Spira, M.
1 Institut für Theoretische Physik (ITP), Karlsruher Institut für Technologie (KIT)


Higgs pair production through gluon fusion is an important process at the LHC to test the dynamics underlying electroweak symmetry breaking. Higgs sectors beyond the Standard Model (SM) can substantially modify this cross section through novel couplings not present in the SM or the on-shell production of new heavy Higgs bosons that subsequently decay into Higgs pairs. CP violation in the Higgs sector is important for the explanation of the observed matter-antimatter asymmetry through electroweak baryogenesis. In this work we compute the next-to-leading order (NLO) QCD corrections in the heavy top quark limit, including the effects of CP violation in the Higgs sector. We choose the effective theory (EFT) approach, which provides a rather model-independent way to explore New Physics (NP) effects by adding dimension-6 operators, both CP-conserving and CP-violating ones, to the SM Lagrangian. Furthermore, we perform the computation within a specific UV-complete model and choose as benchmark model the general 2-Higgs-Doublet Model with CP violation, the C2HDM. Depending on the dimension-6 coefficients, the relative NLO QCD corrections are affected by several per cent through the new CP-violating operators. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000076983
Veröffentlicht am 28.11.2017
DOI: 10.1016/j.nuclphysb.2017.10.002
Zitationen: 28
Web of Science
Zitationen: 26
Zitationen: 25
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Theoretische Physik (ITP)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 12.2017
Sprache Englisch
Identifikator ISSN: 0550-3213, 1873-1562
KITopen-ID: 1000076983
Erschienen in Nuclear physics <Amsterdam> / B
Verlag North-Holland Publishing
Band 925
Seiten 1-27
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
Vorab online veröffentlicht am 04.10.2017
Nachgewiesen in Web of Science
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