Predictions of m(b)/m(tau) and m(t) in an asymptotically nonfree theory
dc.contributor.author | Bando, M. | en |
dc.contributor.author | Onogi, T. | en |
dc.contributor.author | Sato, J. | en |
dc.contributor.author | Takeuchi, Tatsu | en |
dc.contributor.department | Physics | en |
dc.date.accessioned | 2016-10-18T23:49:28Z | en |
dc.date.available | 2016-10-18T23:49:28Z | en |
dc.date.issued | 1997-08-01 | en |
dc.description.abstract | We discuss an extension of the Minimal Supersymmetric Standard Model (MSSM) with 5 generations of matter superfields. The extra generations are assumed to form a generation–mirror generation pair (the 4th and anti-4th generations) enabling the extra fermions to have SU(2)<sub>L</sub> × U(1)<sub>Y</sub> invariant masses. Due to the contribution of the extra generations, all three running gauge couplings of SU(3)<sub>C</sub> × SU(2)<sub>L</sub> × U(1)<sub>Y</sub> become asymptotically non– free while preserving gauge coupling unification at the GUT scale. We show that due to the asymptotically non–free character of the gauge couplings: (1) the top and bottom Yukawa couplings are strongly focused onto infrared fixed points as they are evolved down in scale making their values at µ = M<sub>Z</sub> insensitive to their initial values at µ = M<sub>GUT</sub>; (2) the model predicts R<sub>bτ</sub> ( MZ ) ≡ Y<sub>b</sub>/Y<sub>τ</sub> |<sub>µ=M<sub>Z</sub></sub> ≈ 1 .8, which is consistent with the experimental value provided we take the ratio of Yukawa couplings at the GUT scale to be R<sub>bτ</sub>(M<sub>GUT</sub>) = Y<sub>b</sub>/Y<sub>τ</sub> |<sub>µ=M<sub>GUT</sub></sub> = 1/3; (3) the t mass prediction comes out to be m<sub>t</sub> ≈ 180 GeV which is also consistent with experiment. | en |
dc.description.version | Published version | en |
dc.format.extent | 1589 - 1597 (9) page(s) | en |
dc.format.mimetype | application/pdf | en |
dc.identifier.doi | https://doi.org/10.1103/PhysRevD.56.1589 | en |
dc.identifier.issn | 1550-7998 | en |
dc.identifier.issue | 3 | en |
dc.identifier.uri | http://hdl.handle.net/10919/73266 | en |
dc.identifier.volume | 56 | en |
dc.language.iso | en | en |
dc.publisher | American Physical Society | en |
dc.relation.uri | http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:A1997XM77500027&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=930d57c9ac61a043676db62af60056c1 | en |
dc.rights | In Copyright | en |
dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | en |
dc.subject | Astronomy & Astrophysics | en |
dc.subject | Physics, Particles & Fields | en |
dc.subject | Physics | en |
dc.subject | ELECTROWEAK SYMMETRY-BREAKING | en |
dc.subject | GRAND UNIFIED THEORIES | en |
dc.subject | TOP-QUARK MASS | en |
dc.subject | INFRARED FIXED-POINT | en |
dc.subject | YUKAWA UNIFICATION | en |
dc.subject | STANDARD MODEL | en |
dc.subject | SUSY MODEL | en |
dc.subject | COUPLING UNIFICATION | en |
dc.subject | B->S-GAMMA DECAY | en |
dc.subject | HEAVY FAMILIES | en |
dc.title | Predictions of m(b)/m(tau) and m(t) in an asymptotically nonfree theory | en |
dc.title.serial | Physical Review D | en |
dc.type | Article - Refereed | en |
dc.type.dcmitype | Text | en |
pubs.organisational-group | /Virginia Tech | en |
pubs.organisational-group | /Virginia Tech/All T&R Faculty | en |
pubs.organisational-group | /Virginia Tech/Science | en |
pubs.organisational-group | /Virginia Tech/Science/COS T&R Faculty | en |
pubs.organisational-group | /Virginia Tech/Science/Physics | en |