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Related papers: Discovering 125 GeV techni-dilaton at LHC

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We present discovery signatures of techni-dilaton (TD) at LHC. The TD was predicted long ago as a pseudo Nambu-Goldstone boson (pNGB) associated with the spontaneous breaking of the approximate scale symmetry in the walking technicolor…

High Energy Physics - Phenomenology · Physics 2011-09-14 Shinya Matsuzaki , Koichi Yamawaki

We explore discovery signatures of techni-dilaton (TD) at LHC. The TD was predicted long ago as a composite pseudo Nambu-Goldstone boson (pNGB) associated with the spontaneous breaking of the approximate scale symmetry in the walking…

High Energy Physics - Phenomenology · Physics 2012-03-03 Shinya Matsuzaki , Koichi Yamawaki

The technidilaton (TD) is a composite scalar predicted in walking technicolor (WTC), arising as a pseudo Nambu-Goldstone boson associated with the spontaneous breaking of the approximate scale invariance. Due to the Nambu-Goldstone boson's…

High Energy Physics - Phenomenology · Physics 2017-08-23 Shinya Matsuzaki

A new particle at around 125 GeV has been observed at the LHC, which we show could be identified with the techni-dilaton (TD) predicted in the walking technicolor and thus should be an evidence of walking technicolor. The TD is a pseudo…

High Energy Physics - Phenomenology · Physics 2015-06-05 Shinya Matsuzaki , Koichi Yamawaki

In contrast to the folklore that Technicolor (TC) is a "Higgsless theory", we shall discuss existence of a composite Higgs boson, Techni-Dilaton (TD), a pseudo-Nambu-Goldstone boson of the scale invariance in the…

High Energy Physics - Phenomenology · Physics 2010-11-15 Koichi Yamawaki

Walking technicolor predicts a light composite scalar, techni-dilaton, arising as a pseudo Nambu-Goldstone boson for the approximate scale symmetry spontaneously broken by techni-fermion condensation. We show that a light techni-dilaton…

High Energy Physics - Phenomenology · Physics 2015-06-03 Shinya Matsuzaki , Koichi Yamawaki

We find that a holographic walking technicolor model has a limit ("conformal limit") where the techni-dilaton (TD) becomes an exactly massless Nambu-Goldstone boson of the scale symmetry with its nonzero finite decay constant F_phi /= 0,…

High Energy Physics - Phenomenology · Physics 2015-06-11 Shinya Matsuzaki , Koichi Yamawaki

Walking technicolor, having a large anomalous dimension $\gamma_m \simeq 1$ and approximate scale symmetry, predicts Technidilaton, a light composite Higgs as a pseudo-Nambu-Goldstone boson of the approximate scale symmetry, which can be…

High Energy Physics - Phenomenology · Physics 2013-05-29 Koichi Yamawaki

We study a holographic model dual to walking/conformal technicolor (W/C TC) deforming a hard-wall type of bottom-up setup by including effects from techni-gluon condensation. We calculate masses of (techni-) $\rho$ meson, $a_1$ meson, and…

High Energy Physics - Phenomenology · Physics 2010-03-16 Kazumoto Haba , Shinya Matsuzaki , Koichi Yamawaki

The walking technicolor based on the ladder Schwinger-Dyson gap equation is studied, with the scale-invariant coupling being an idealization of the Caswell-Banks-Zaks infrared fixed point in the "anti-Veneziano limit", such that $N_C…

High Energy Physics - Phenomenology · Physics 2016-11-15 Shinya Matsuzaki , Koichi Yamawaki

The almost conformal dynamics of walking technicolor (TC) implies the existence of the approximate scale invariance, which breaks down spontaneously by the condensation of anti-techni and techni-fermions. According to the Goldstone theorem,…

High Energy Physics - Phenomenology · Physics 2015-06-03 Ki-Young Choi , Deog Ki Hong , Shinya Matsuzaki

Techni-dilaton, a pseudo-Nambu-Goldstone boson of scale symmetry, was predicted long ago in the Scale-invariant/Walking/Conformal Technicolor (SWC-TC) as a remnant of the (approximate) scale symmetry associated with the conformal fixed…

High Energy Physics - Phenomenology · Physics 2014-11-21 Kazumoto Haba , Shinya Matsuzaki , Koichi Yamawaki

Higgs boson may be a composite particle as Sakata vigorously looked for never-ending substructures of Nature. He proposed the Sakata model for hadrons, which was the prototype of the quark model and thus lauched the last Revolution in…

High Energy Physics - Phenomenology · Physics 2015-06-05 Koichi Yamawaki

The LHC Higgs can be identified as the technidilaton, a composite scalar, arising as a pseudo Nambu-Goldstone boson for the spontaneous breaking of scale symmetry in walking technicolor. One interesting candidate for the walking technicolor…

High Energy Physics - Phenomenology · Physics 2015-10-26 Shinya Matsuzaki

The dilaton, a pseudo-Nambu-Goldstone boson appearing in spontaneous scale symmetry breaking at a TeV scale f, may be found in Higgs boson searches. The dilaton couples to standard model fermions and weak bosons with the same structure as…

High Energy Physics - Phenomenology · Physics 2013-05-30 Vernon Barger , Muneyuki Ishida , Wai-Yee Keung

We formulate a scale-invariant hidden local symmetry (HLS) as a low-energy effective theory of walking technicolor (WTC) which includes the technidilaton, technipions, and technirho mesons as the low-lying spectra. As a benchmark for LHC…

High Energy Physics - Phenomenology · Physics 2014-11-10 Masafumi Kurachi , Shinya Matsuzaki , Koichi Yamawaki

Precision electroweak data, a light higgs and LHC searches for new spin one particles are all very constraining on technicolor models. We use a holographic model of walking techicolor (WTC) gauge dynamics, tuned to produce a light higgs and…

High Energy Physics - Phenomenology · Physics 2019-05-15 Alexander Belyaev , Azaria Coupe , Nick Evans , Marc Scott

The ATLAS collaboration has recently reported an excess of about 2.5 $\sigma$ global significance at around 2 TeV in the diboson channel with the boson-tagged fat dijets, which may imply a new resonance beyond the standard model. We provide…

High Energy Physics - Phenomenology · Physics 2015-09-30 Hidenori S. Fukano , Masafumi Kurachi , Shinya Matsuzaki , Koji Terashi , Koichi Yamawaki

In this talk I argue that a light techni-dilaton exists in models of walking technicolor near the conformal window. The light techni-dilaton then mixes with the composite Higgs, which is predicted to be narrow and light in walking…

High Energy Physics - Phenomenology · Physics 2017-08-23 Deog Ki Hong

We show that the Standard Model (SM) Higgs Lagrangian is identical to the nonlinear realization of both the scale and chiral symmetries ("scale-invariant nonlinear sigma model"), and is further gauge equivalent to the "scale-invariant…

High Energy Physics - Phenomenology · Physics 2015-11-25 Koichi Yamawaki
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