Anatomy of Top-Mode Extended Technicolor Model
| dc.creator | Fukano, Hidenori | |
| dc.creator | Yamawaki, Koichi | |
| dc.date | 2008-01-24 | |
| dc.date | 2008-02-19 | |
| dc.date.accessioned | 2026-07-07T11:55:30Z | |
| dc.date.available | 2026-07-07T11:55:30Z | |
| dc.description | We analyze two versions of the extended technicolor (ETC) incorporating the top quark condensate via the flavor-universal coloron type topcolor $SU(3)_1 \times SU(3)_2$: A straightforward top-mode ETC having quarks and techniquarks assigned to a single (strong) $SU(3)_1$, and a ``twisted model'' with techniquarks carrying the weak $SU(3)_2$ while quarks the strong $SU(3)_1$. The straightforward model has the same ETC structure as that of Appelquist et al. without topcolor which we first analyze to find that it yields only too small ETC-induced mass for the third generation. In contrast, our model having topcolor takes the form of a version of the topcolor-assisted technicolor (TC2) after ETC breakings, which triggers the top quark condensate giving rise to a realistic top mass. However, techniquarks have the strong topcolor $SU(3)_1$ in addition to the already strong walking/conformal technicolor, which triggers the techniquark condensate at scale much higher than the weak scale, a disaster. We then consider a ``twisted model'' of TC2, though not an explicit ETC. We find a new feature that ``ETC''-induced quark mass is enhanced to the realistic value by the large anomalous dimension $γ_m \simeq 2$ of Nambu-Jona-Lasinio-type topcolor interactions. The result roughly reproduces the realistic quark masses. We further find a novel effect of the above large anomalous dimension $γ_m \simeq 2$: The top-pion mass has a universal upper bound, $m_{π_t} < 70 \GeV$, in the generic TC2 model. | |
| dc.description | 35 pages, 2 figures, to be published in Prog. Theor. Phys., upper bound of top-pion mass is modified to 70 GeV, other minor corrections | |
| dc.identifier | https://arxiv.org/abs/0801.3716 | |
| dc.identifier | http://arxiv.org/abs/0801.3716 | |
| dc.identifier | Prog.Theor.Phys.119:429-460,2008 | |
| dc.identifier | doi:10.1143/PTP.119.429 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/205266 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Anatomy of Top-Mode Extended Technicolor Model | |
| dc.type | text |