CERN LHC signatures of resonant CP violation in a minimal supersymmetric Higgs sector

Journal Article · Fri Oct 01 04:00:00 EDT 2004 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.70.075010· OSTI ID:20705381

Ellis, John ^[1]; Lee, Jae Sik; Pilaftsis, Apostolos ^[2]

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1. Theory Division, Physics Department, CERN, CH-1211 Geneva 23 (Switzerland)
2. Department of Physics and Astronomy, University of Manchester, Manchester M13 9PL (United Kingdom)

We present the general formalism for studying CP-violating phenomena in the production, mixing and decay of a coupled system of CP-violating neutral Higgs bosons at high-energy colliders. Considering the minimal supersymmetric standard model (MSSM) Higgs sector in which CP violation is radiatively induced by phases in the soft supersymmetry-breaking third-generation trilinear squark couplings and gaugino masses, we apply our formalism to neutral Higgs production via bb, gg and W{sup +}W{sup -} collisions at the CERN LHC. We discuss CP asymmetries in the longitudinal and transverse polarizations of {tau}{sup +}{tau}{sup -} pairs. The signatures of CP violation are more prominent in the production via gg and W{sup +}W{sup -} than via bb, and are resonantly enhanced when two (or all three) neutral Higgs bosons are nearly degenerate with mass differences comparable to their decay widths. Such scenarios occur naturally in the MSSM for values of tan{beta} > or approx. 5(30) and large (small) charged Higgs-boson masses. We analyze representative examples with large mixing between the three neutral Higgs bosons weighing about 120 GeV, that may exhibit observable CP asymmetries even as large as 80%.

• OSTI ID: 20705381
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 7 Vol. 70; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
CERN LHC
CP INVARIANCE
GEV RANGE
GLUON-GLUON INTERACTIONS
HIGGS BOSONS
HIGGS MODEL
MASS DIFFERENCE
PARTICLE DECAY
PARTICLE PRODUCTION
POLARIZATION
QUARK-ANTIQUARK INTERACTIONS
SPARTICLES
STANDARD MODEL
SUPERSYMMETRY
SYMMETRY BREAKING
W MINUS BOSONS
W PLUS BOSONS