• DOI:10.1140/epjc/s10052-018-5543-4
• Corpus ID: 119426728

Impact of $$\mathcal {CP}$$CP-violating interference effects on MSSM Higgs searches

@article{Fuchs2018ImpactO,
  title={Impact of \$\$\mathcal \{CP\}\$\$CP-violating interference effects on MSSM Higgs searches},
  author={Elina Fuchs and Georg Weiglein},
  journal={The European Physical Journal C},
  year={2018},
  volume={78},
  pages={1-19}
}

• Elina Fuchs, G. Weiglein
• Published 16 May 2017
• Physics
• The European Physical Journal C

Interference and mixing effects between neutral Higgs bosons in the MSSM with complex parameters are shown to have a significant impact on the interpretation of LHC searches for additional Higgs bosons. Complex MSSM parameters introduce mixing between the $$\mathcal {CP}$$CP-even and $$\mathcal {CP}$$CP-odd Higgs states h, H, A into the mass eigenstates $$h_1, h_2, h_3$$h1,h2,h3 and generate $$\mathcal {CP}$$CP-violating interference terms. Both effects are enhanced in the case of almost degenerate states. Employing as an example an extension of a frequently used benchmark scenario by a non-zero phase $$\phi _{A_t}$$ϕAt, the interference contributions are obtained for the production of neutral Higgs bosons in gluon-fusion and in association with b-quarks followed by the decay into a pair of $$\tau $$τ-leptons. While the resonant mixing increases the individual cross sections for the two heavy Higgs bosons $$h_2$$h2 and $$h_3$$h3, strongly destructive interference effects between the contributions involving $$h_2$$h2 and $$h_3$$h3 leave a considerable parameter region unexcluded that would appear to be ruled out if the interference effects were neglected.