S-parameter and pseudo-Nambu-Goldstone boson mass from lattice QCD

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dc.creatorShintani, E.
dc.creatorAoki, S.
dc.creatorFukaya, H.
dc.creatorHashimoto, S.
dc.creatorKaneko, T.
dc.creatorMatsufuru, H.
dc.creatorOnogi, T.
dc.creatorYamada, N.
dc.creatorCollaboration, for JLQCD
dc.date2008-06-26
dc.date2008-12-03
dc.date.accessioned2026-07-07T12:27:25Z
dc.date.available2026-07-07T12:27:25Z
dc.descriptionWe present a lattice calculation of $L_{10}$, one of the low energy constants in Chiral Perturbation Theory, and the charged-neutral pion squared mass splitting, using dynamical overlap fermion. Exact chiral symmetry of the overlap fermion allows us to reliably extract these quantities from the difference of the vacuum polarization functions for vector and axial-vector currents. In the context of the technicolor models, these two quantities are read as the $S$-parameter and the pseudo-Nambu-Goldstone boson mass respectively, and play an important role in discriminating the models from others. This calculation can serve as a feasibility study of the lattice techniques for more general technicolor gauge theories.
dc.description9 pages, 3 figures, references added, minor corrections made, version to appear in PRL
dc.identifierhttps://arxiv.org/abs/0806.4222
dc.identifierhttp://arxiv.org/abs/0806.4222
dc.identifierPhys.Rev.Lett.101:242001,2008
dc.identifierdoi:10.1103/PhysRevLett.101.242001
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/215202
dc.subjectHigh Energy Physics - Lattice
dc.subjectHigh Energy Physics - Phenomenology
dc.titleS-parameter and pseudo-Nambu-Goldstone boson mass from lattice QCD
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