Virtual Effects of Excited Quarks as Probes of a Possible New Hadronic Mass Scale

Burges, C.J.C.; Schnitzer, Howard J.

doi:10.1016/0550-3213(83)90555-2

Virtual Effects of Excited Quarks as Probes of a Possible New Hadronic Mass Scale

C.J.C. Burges
(
- Brandeis U.
)
,
Howard J. Schnitzer
(
- Brandeis U.
)

Apr, 1983

37 pages

Published in:

Nucl.Phys.B 228 (1983) 464-500

Published: 1983

DOI:

10.1016/0550-3213(83)90555-2

Report number:

Print-83-0346 (BRANDEIS)

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Abstract: (Elsevier)

The effects of spin - 3 2 excited quarks are considered as probes of a possible new hadronic mass-scale Λ. A specific model is developed which describes virtual spin - 3 2 quarks of mass of O(Λ). Induced effects, which are corrections to the standard SU(2) × U(1) electroweak model, include right-handed charged currents and flavor changing neutral currents. A model-independent classification of all SU(3) × SU(2) × U(1) invariant quark operators of dimension six or less is also presented. Ambiguities in converting this analysis and existing experiments to a definitive lower-bound for Λ are discussed. It is found, depending on the strength of certain Higgs couplings and the underlying global flavor symmetries in the absence of Higgs couplings, that a lower bound as small as Λ > 500 GeV or as large as Λ > 100 TeV is possible.

QUARK: EXCITED STATE
SPIN: 3/2
3/2: SPIN
QUANTUM CHROMODYNAMICS
MODEL: STRONG INTERACTION
STRONG INTERACTION: MODEL
GAUGE FIELD THEORY: LAMBDA PARAMETER
MODEL: PREQUARK
GAUGE FIELD THEORY: SU(3) X SU(2) X U(1)
MODEL: HIGGS

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