Realistic supersymmetric model with composite quarks

Journal Article · Wed Oct 01 04:00:00 EDT 1997 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.56.4226· OSTI ID:542768

Nelson, A E ^[1]; Strassler, M J ^[2]

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1. Department of Physics, Box 351560, University of Washington, Seattle, Washington 98195-1560 (United States)
2. Department of Physics and Astronomy, Rutgers University, P.O. Box 849, Piscataway, New Jersey 08855 (United States)

We describe a realistic, renormalizable, supersymmetric {open_quotes}quindecuplet{close_quotes} model in which the top quark, left-handed bottom quark, and up-type Higgs boson are composite, with a compositeness scale {approximately}1{endash}3 TeV. The top-quark{endash}Higgs-boson Yukawa coupling is a dynamically generated strong interaction effect, and is naturally much larger than any other Yukawa coupling. The light-quark doublets and right-handed up-type quarks are also composite but at higher energies; the hierarchy of quark masses and mixings is due to a hierarchy in the compositeness scales. Flavor-changing neutral currents are naturally suppressed, as is baryon-number violation by Planck-scale dimension-five operators. The model predicts that the most easily observable effects would be on b-quark physics and on the {rho} parameter. In particular, a small negative {Delta}{rho}={minus}{epsilon} leads to {Delta}R{sub b}>+2{epsilon}. There are effects on B-meson mixing and on flavor-changing neutral-current b-quark decays to leptons which might be detectable, but not on b{r_arrow}s{gamma}. The model also suggests the supersymmetry-breaking mass for the right-handed top squark might be considerably larger than that of the left-handed top squark. {copyright} {ital 1997} {ital The American Physical Society}

• DOE Contract Number: FG05-90ER40559; FG06-91ER40614
• OSTI ID: 542768
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 7 Vol. 56; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
B MESONS
B QUARKS
COMPOSITE MODELS
FLAVOR
HIGGS BOSONS
MASS
MIXING
NEUTRAL CURRENTS
QUARKS
RENORMALIZATION
SUPERSYMMETRY
T QUARKS
UNIFIED GAUGE MODELS
YUKAWA POTENTIAL