Anthropic tuning of the weak scale and of m{sub u}/m{sub d} in two-Higgs-doublet models

Journal Article · Wed Aug 15 00:00:00 EDT 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.76.045002· OSTI ID:21027626

Barr, S M; Khan, Almas ^[1]

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1. Bartol Research Institute, University of Delaware, Newark, Delaware 19716 (United States)

It is shown that, in a model in which up-type and down-type fermions acquire mass from different Higgs doublets, the anthropic tuning of the Higgs mass parameters can explain the fact that the observed masses of the d and u quarks are nearly the same with d slightly heavier. If Yukawa couplings are assumed not to scan (vary among domains), this would also help explain why t is much heavier than b. It is also pointed out that the existence of dark matter invalidates some earlier anthropic arguments against the viability of domains where the standard model Higgs has positive {mu}{sup 2}, but makes other even stronger arguments possible.

• OSTI ID: 21027626
• Journal Information: Physical Review. D, Particles Fields, Vol. 76, Issue 4; Other Information: DOI: 10.1103/PhysRevD.76.045002; (c) 2007 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
COUPLING
HIGGS BOSONS
HIGGS MODEL
NONLUMINOUS MATTER
REST MASS
STANDARD MODEL
U QUARKS
WEAK INTERACTIONS