Usage of the or T Anti-t Decay Mode to Distinguish an Intermediate Mass Higgs Boson From a Technipion
Nov 18, 198817 pages
Published in:
- Nucl.Phys.B 320 (1989) 86-102
- Published: 1989
Report number:
- SUNY-BING-3-31-88-REV,
- SUNY-BING-3-31-88
Citations per year
Abstract: (Elsevier)
A technipion and an elementary Higgs particle with a mass greater than about 10 GeV can always be distinguished by a 10–20% accuracy measurement of the full sequential decay correlation function I ( E 1 , E 2 , cos ψ 12 ) = S + γ CP D in the Higgs/technipion rest frame for a decay mode such as τ τ with τ ± → ℓ ± ν ν or t t with t → b μ + ν , t → b μ − ν , where E 1,2 are the charged lepton energies and ψ 12 is the angle between the charged lepton momenta. For the charged leptons back-to-back, in the extreme relativistic scaling limit D / S ≅ 21% for E 1 = E 2 ≅ ( E max /2), whereas for M H = 70 GeV already D / S ≅ 19% so the scaling limit is rapidly reached. If for the t t mode the b jets′ momenta are also measured, then a correlation function in t quark rest frames′ helicity angles and energies can be used instead to determine γ CP but from a much smaller number of events. This procedure is possible because the standard ν ν correlation function is symmetric in the azimuthal angle φ ν ν , so cos φ ν ν and the helicity polar angles θ ν and θ ν of the missing and antineutrino are measurable in spite of a two-fold kinematic ambiguity in the t and t momenta directions. If the top quark has a mass m t ≥ 100 GeV, the t t mode with t → bW + , t → b W − can be used to determine γ CP by measuring the two b jets′ momenta.Note:
- Revised version
- HIGGS PARTICLE: DECAY MODES
- DECAY MODES: HIGGS PARTICLE
- HIGGS PARTICLE: WIDTH
- TAU: PAIR PRODUCTION
- PAIR PRODUCTION: TAU
- top: PAIR PRODUCTION
- PAIR PRODUCTION: TOP
- CORRELATION FUNCTION
- TAU: LEPTONIC DECAY
- LEPTONIC DECAY: TAU
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