Electroweak chiral Lagrangian from the topcolor-assisted technicolor model with nontrivial technicolor fermion condensation and walking

Autor:	Feng-Jun Ge, Qing Wang, Shao-Zhou Jiang
Rok vydání:	2011
Předmět:	Physics Nuclear and High Energy Physics Particle physics Hypercharge Critical phenomena High Energy Physics::Phenomenology Electroweak interaction Topcolor Order (ring theory) Technicolor Fermion Upper and lower bounds
Zdroj:	Physical Review D. 84
ISSN:	1550-2368 1550-7998
DOI:	10.1103/physrevd.84.015009
Popis:	The electroweak chiral Lagrangian for the topcolor-assisted technicolor model proposed by K. Lane, which uses nontrivial patterns of techniquark condensation and walking, was investigated in this study. We found that the features of the model are qualitatively similar to those of Lane's previous natural topcolor-assisted technicolor prototype model, but there is no limit on the upper bound of the ${Z}^{\ensuremath{'}}$ mass. We discuss the phase structure and possible walking behavior of the model. We obtained the values of all coefficients of the electroweak chiral Lagrangian up to an order of ${p}^{4}$. We show that although the walking effect reduces the $S$ parameter to half its original value, it maintains an order of 2. Moreover, a special hypercharge arrangement is needed to achieve further reductions in its value.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8b40c20abdc3735546a2e4d9a98db14f https://doi.org/10.1103/physrevd.84.015009 Zobrazit plný text záznamu