DYNAMICAL SYMMETRY BREAKING, AXION DYNAMICS AND INSTANTON-INDUCED SECOND-CLASS τ-DECAYS

1987 ◽  
Vol 02 (12) ◽  
pp. 945-955 ◽  
Author(s):  
ALAN R. WHITE
Keyword(s):  
Symmetry Breaking ◽  
Decay Mode ◽  
Anomalous Dimension ◽  
Dynamical Symmetry ◽  
Electroweak Symmetry Breaking ◽  
Electroweak Symmetry ◽  
Scaling Properties ◽  
Dynamical Symmetry Breaking ◽  
Axion Mass

Small color instantons, which have been proposed as a mechanism to raise the axion mass, may also produce a large rate for the second-class τ-decay mode τ → πηντ. The growth of the QCD coupling and large anomalous dimension scaling properties needed are natural consequences of dynamical electroweak symmetry breaking by color sextet quarks.

scholarly journals Bootstrap Dynamical Symmetry Breaking

2013 ◽  
Vol 2013 ◽  
pp. 1-19
Author(s):  
Wei-Shu Hou
Keyword(s):  
Symmetry Breaking ◽  
Yukawa Coupling ◽  
Dynamical Symmetry ◽  
Electroweak Symmetry Breaking ◽  
Electroweak Symmetry ◽  
Light Higgs Boson ◽  
Gap Equation ◽  
Dynamical Symmetry Breaking ◽  
Longitudinal Modes ◽  
Goldstone Bosons

Despite the emergence of a 125 GeV Higgs-like particle at the LHC, we explore the possibility of dynamical electroweak symmetry breaking by strong Yukawa coupling of very heavy new chiral quarksQ. Taking the 125 GeV object to be a dilaton with suppressed couplings, we note that the Goldstone bosonsGexist as longitudinal modesVLof the weak bosons and would couple toQwith Yukawa couplingλQ. WithmQ≳700 GeV from LHC, the strongλQ≳4could lead to deeply boundQQ¯states. We postulate that the leading “collapsed state,” the color-singlet (heavy) isotriplet, pseudoscalarQQ¯mesonπ1, isGitself, and a gap equation without Higgs is constructed. Dynamical symmetry breaking is affected via strongλQ, generatingmQwhile self-consistently justifying treatingGas massless in the loop, hence, “bootstrap,” Solving such a gap equation, we find thatmQshould be several TeV, orλQ≳4π, and would become much heavier if there is a light Higgs boson. For such heavy chiral quarks, we find analogy with theπ−Nsystem, by which we conjecture the possible annihilation phenomena ofQQ¯→nVLwith high multiplicity, the search of which might be aided by Yukawa-boundQQ¯resonances.

RADIATIVE EFFECTS AND ELECTROWEAK SYMMETRY BREAKING IN A SUPERSYMMETRIC PREON MODEL

1999 ◽  
Vol 14 (09) ◽  
pp. 1389-1427
Author(s):  
JONGBAE KIM
Keyword(s):  
Symmetry Breaking ◽  
Dynamical Symmetry ◽  
Electroweak Symmetry Breaking ◽  
Effective Theory ◽  
Supersymmetric Particle ◽  
Electroweak Symmetry ◽  
Radiative Effects ◽  
Yukawa Couplings ◽  
Lepton Universality

We construct the low energy effective theory of composite quarks, leptons, and Higgs bosons for a supersymmetric preon model and study the effects of renormalization-group based radiative corrections. The study on the evolution of scalar masses for avoiding color and charge breakings leads us to conclude that Yukawa couplings are bounded from above. The implementation of electroweak symmetry breaking requires that only the purely dynamical symmetry breaking should be needed for the model, but the combined scheme of dynamical and radiative symmetry breaking as well as the purely radiative symmetry breaking scheme be disfavored. Our analysis of [Formula: see text] including radiative effects shows that, should a discrepancy be found between the observed and the theoretical value of [Formula: see text] after experimental determination of supersymmetric particle masses, it would imply that the complete quark–lepton universality in the supersymmetric preon model does not hold either for the Yukawa couplings, or for the condensates, or for both.

scholarly journals THE η6 AT LEP AND TRISTAN

1993 ◽  
Vol 08 (17) ◽  
pp. 1611-1620 ◽  
Author(s):  
KYUNGSIK KANG ◽  
IAN G. KNOWLES ◽  
ALAN R. WHITE
Keyword(s):  
Symmetry Breaking ◽  
Decay Mode ◽  
Quark Condensate ◽  
Electroweak Symmetry Breaking ◽  
Hadronic Decay ◽  
Electroweak Symmetry ◽  
Decay Modes ◽  
Two Photon ◽  
Photon Decay ◽  
Quark Sector

The η6 is a “heavy axion” remnant of dynamical electroweak symmetry breaking by a color sextet quark condensate. Electroweak scale color instanton interactions allow it to be both very massive and yet be responsible for Strong CP conservation in the color triplet quark sector. It may have been seen at LEP via its two-photon decay mode and at TRISTAN via its hadronic decay modes.

INFRARED ANOMALOUS INTERACTIONS AS A SIGNAL FOR ELECTROWEAK SYMMETRY BREAKING BY COLOR SEXTET QUARKS

1986 ◽  
Vol 01 (03) ◽  
pp. 693-708 ◽  
Author(s):  
ERIC BRAATEN ◽  
ALAN R. WHITE ◽  
CHARLES R. WILLCOX
Keyword(s):  
Symmetry Breaking ◽  
Axial Vector ◽  
Dynamical Symmetry ◽  
Chiral Condensate ◽  
Electroweak Symmetry Breaking ◽  
Electroweak Symmetry ◽  
Gauge Invariant ◽  
Effective Lagrangian ◽  
Vector Bosons ◽  
Gauge Anomalies

We study the possibility that electroweak symmetry breaking occurs dynamically as a consequence of a chiral condensate of color sextet quarks. New (but conventional) leptons are used to cancel gauge anomalies. An effective Lagrangian with a Wess-Zumino term is used to describe “sextet pion” interactions and associated chiral anomalies. We show that the gauge-invariant effective Lagrangian which describes infrared interactions of the physical W± and Z0 vector bosons contain axial-vector chiral anomalies generated by lepton loops. Lepton-induced anomalous interactions would therefore be a signal of this form of dynamical symmetry breaking.

scholarly journals A UNIQUE SU(5) AND SO(10) UNIFICATION WITH COMPLETE DYNAMICAL SYMMETRY BREAKING

1987 ◽  
Vol 02 (02) ◽  
pp. 409-442 ◽  
Author(s):  
KYUNGSIK KANG ◽  
ALAN R. WHITE
Keyword(s):  
Symmetry Breaking ◽  
Dynamical Symmetry ◽  
Chiral Condensate ◽  
Physical Significance ◽  
Electroweak Symmetry Breaking ◽  
Dynamical Analysis ◽  
Asymptotic Freedom ◽  
Electroweak Symmetry ◽  
Quark Sector ◽  
The Standard Model

A unique asymptotically free, anomaly-free, SU(5) gauge theory is proposed as a possible complete unification of the standard model in which all symmetry-breaking is dynamical. The asymptotic freedom constraint is saturated, removing renormalon divergences and leaving well-defined instanton interactions as the only nonperturbative ingredient of the theory. Consequently, it is argued, topological vacuum polarization of a very heavy, unconventional quantum number, quark sector dominates the dynamics, producing SU(5) symmetry breaking and a three generation low energy spectrum. Electroweak symmetry breaking is due to a chiral condensate of color sextet quarks. The embedding of the theory in a single SO(10) representation is used for the dynamical analysis and may also have physical significance.

scholarly journals Dark matter spectra from the electroweak to the Planck scale

2021 ◽  
Vol 2021 (6) ◽  
Author(s):  
Christian W. Bauer ◽  
Nicholas L. Rodd ◽  
Bryan R. Webber
Keyword(s):  
Dark Matter ◽  
Standard Model ◽  
Symmetry Breaking ◽  
Planck Scale ◽  
Electroweak Symmetry Breaking ◽  
Indirect Detection ◽  
Electroweak Symmetry ◽  
Stable States ◽  
Decay Spectrum ◽  
Crucial Ingredient

Abstract We compute the decay spectrum for dark matter (DM) with masses above the scale of electroweak symmetry breaking, all the way to the Planck scale. For an arbitrary hard process involving a decay to the unbroken standard model, we determine the prompt distribution of stable states including photons, neutrinos, positrons, and antiprotons. These spectra are a crucial ingredient in the search for DM via indirect detection at the highest energies as being probed in current and upcoming experiments including IceCube, HAWC, CTA, and LHAASO. Our approach improves considerably on existing methods, for instance, we include all relevant electroweak interactions.

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