Resonant CP violation in Higgs radiation at an e{sup +}e{sup -} linear collider

Journal Article · Tue Nov 01 00:00:00 EST 2005 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.72.095006· OSTI ID:20713864

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. School of Physics and Astronomy, University of Manchester, Manchester M13 9PL (United Kingdom)

We study resonant CP violation in the Higgsstrahlung process e{sup +}e{sup -}{yields}H{sub 1,2,3}(Z{yields}e{sup +}e{sup -},{mu}{sup +}{mu}{sup -}) and subsequent decays H{sub 1,2,3}{yields}bb,{tau}{sup -}{tau}{sup +}, in the minimal supersymmetric extension of the standard model (MSSM) with Higgs-sector CP violation induced by radiative corrections. At a high-energy e{sup +}e{sup -} linear collider, the recoil-mass method enables one to determine the invariant mass of a fermion pair produced by Higgs decays with a precision as good as 1 GeV. Assuming an integrated luminosity of 100 fb{sup -1}, we show that the production line shape of a coupled system of neutral Higgs bosons decaying into bb quarks is sensitive to the CP-violating parameters. When the Higgs bosons decay into {tau}{sup -}{tau}{sup +}, two CP asymmetries can be defined using the longitudinal and transverse polarizations of the {tau} leptons. Taking into account the constraints from electric dipole moments, we find that these CP asymmetries can be as large as 80%, in a trimixing scenario where all three neutral Higgs states of the MSSM are nearly degenerate and mix significantly.

• OSTI ID: 20713864
• Journal Information: Physical Review. D, Particles Fields, Vol. 72, Issue 9; Other Information: DOI: 10.1103/PhysRevD.72.095006; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
CP INVARIANCE
ELECTRIC DIPOLE MOMENTS
ELECTRON-POSITRON INTERACTIONS
GEV RANGE
HIGGS BOSONS
HIGGS MODEL
LEPTONIC DECAY
LINEAR COLLIDERS
MUONS MINUS
MUONS PLUS
PAIR PRODUCTION
POLARIZATION
QUARKS
RADIATIVE CORRECTIONS
STANDARD MODEL
SUPERSYMMETRY
TAU PARTICLES
Z NEUTRAL BOSONS