<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>T</mml:mi></mml:math>-parity violation by anomalies

Hill, Christopher T.; Hill, Richard J.

doi:10.1103/physrevd.76.115014

Cited by 162 publications

(268 citation statements)

References 40 publications

(32 reference statements)

Supporting

Mentioning

265

Contrasting

Order By: Relevance

“…A more complicated construction can be applied to the non-abelian factors of the SM allowing to get light chiral fermions, and again one finds potential vector or fermion DM candidates. UV completions the little-Higgs models usually render the permutation symmetry anomalous [29], ruining the stability of DM. In the Universal Extra Dimension context, the problem is that truly universal extra dimensions do not give chiral fermions, so that one needs to add extra structures such as boundaries: divergent quantum corrections generate operators there localized, ruining the 'universality'.…”

Section: Dm Annihilations Into Two Massive Vectors Wmentioning

confidence: 99%

Model-independent implications of the e±, p¯ cosmic ray spectra on properties of Dark Matter

Cirelli¹,

Kadastik²,

Raidal³

et al. 2009

Nuclear Physics B

515

412

View full text Add to dashboard Cite

Taking into account spins, we classify all two-body non-relativistic Dark Matter annihilation channels to the allowed polarization states of Standard Model particles, computing the energy spectra of the stable final-state particles relevant for indirect DM detection. We study the DM masses, annihilation channels and cross sections that can reproduce the PAMELA indications of an e + excess consistently with the PAMELAp data and the ATIC/PPB-BETS e + +e − data. From the PAMELA data alone, two solutions emerge: (i) either the DM particles that annihilate into W, Z, h must be heavier than about 10 TeV or (ii) the DM must annihilate only into leptons. Thus in both cases a DM particle compatible with the PAMELA excess seems to have quite unexpected properties. The solution (ii) implies a peak in the e + + e − energy spectrum, which, indeed, seems to appear in the ATIC/PPB-BETS data around 700 GeV. If upcoming data from ATIC-4 and GLAST confirm this feature, this would point to a O(1) TeV DM annihilating only into leptons. Otherwise the solution (i) would be favored. We comment on the implications of these results for DM models, direct DM detection and colliders as well as on the possibility of an astrophysical origin of the excess.

show abstract

Section: Dm Annihilations Into Two Massive Vectors Wmentioning

confidence: 99%

Model-independent implications of the e±, p¯ cosmic ray spectra on properties of Dark Matter

Cirelli¹,

Kadastik²,

Raidal³

et al. 2009

Nuclear Physics B

515

412

View full text Add to dashboard Cite

show abstract

“…As was shown in Ref. [6], this WZW term would be odd under T-parity, leading to the decay of the lightest T-odd particle [8]. However, recently it was shown that a parity can be implemented in a different way such that that it leaves the WZW term invariant [9].…”

Section: The Little Higgs and T-paritymentioning

confidence: 99%

“…[6] it was argued that this picture is not complete, but that a Wess-Zumino-Witten (WZW) term [7] should be added to the Lagrangian of the model. WZW terms typically occur if the symmetry breaking at the scale Λ is facilitated by some strong dynamics.…”

Section: The Little Higgs and T-paritymentioning

confidence: 99%

Signatures of the Minimal Moose Model With Exact Parity

Freitas

Schwaller

Wyler

2010

Nuclear Physics B - Proceedings Supplements

View full text Add to dashboard Cite

In the popular littlest Higgs model, T-parity can be broken by Wess-Zumino-Witten (WZW) terms induced by a strongly coupled UV completion. On the other hand, certain models with multiple scalar multiplets (called moose models) permit the implementation of T-parity such that it is not broken by the WZW terms. Here we present a concrete realization of such a model, and discuss the phenomenology at the Large Hadron Collider, in particular differences with respect to the littlest Higgs model. AbstractIn the popular littlest Higgs model, T-parity can be broken by Wess-Zumino-Witten (WZW) terms induced by a strongly coupled UV completion. On the other hand, certain models with multiple scalar multiplets (called moose models) permit the implementation of an exchange symmetry (X-parity) such that it is not broken by the WZW terms. Here we present a concrete and realistic construction of such a model. The little Higgs model with X-Parity is a concrete and realistic implementation of this idea. In this contribution, the properties of the model are reviewed and the collider phenomenology is discussed in some detail. We also present new results on the decay properties and LHC signatures of the light triplet scalars that are predicted by this model.

show abstract

“…Also, notice that the (%) reduction in Fig. (4) is entirely due to the cosine of the tT mixing angle c L , which according to formula (17) tends to 1 when either…”

Section: Thetbw + Coupling In the Lht Modelmentioning

confidence: 99%

“…Electroweak precision constraints for the LHT model allow the scale f to be as low as ∼ 500 GeV [15]. This model has therefore received more attention recently, with many phenomenological studies on production and decays of the new heavy particles [16] as well as theoretical studies such as T-parity violation [17], top quark induced vacuum alignment [18], and two vacuum expectation value (VEV) scales f in LH models [19].…”

Section: Introductionmentioning

confidence: 99%

tbWvertex in the littlest Higgs model withTparity

Peñuñuri

Larios

2009

Phys. Rev. D

View full text Add to dashboard Cite

A study of the effective tbW vertex is done in the littlest Higgs model with T parity that includes the one loop induced weak dipole coefficient f 2R . The top's width, the W-boson helicity in the t → bW + decay as well as the t-channel and the s-channel modes of single top quark production at the LHC are then obtained for the tbW coupling. Our calculation is done in the Feynman-'t Hooft gauge, and we provide details of the analysis, like exact formulas (to all orders of the expansion variable v/f ) of masses and mixing angles of all the particles involved. Also, a complete and exact diagonalization (and normalization) of the scalar sector of the model is made.

show abstract

T-parity violation by anomalies

Cited by 162 publications

References 40 publications

Model-independent implications of the e±, p¯ cosmic ray spectra on properties of Dark Matter

Model-independent implications of the e±, p¯ cosmic ray spectra on properties of Dark Matter

Signatures of the Minimal Moose Model With Exact Parity

tbWvertex in the littlest Higgs model withTparity

Contact Info

Product

Resources

About