Showing 2005 · hep-phShow all

14 papers · 2 filters

hep-ph2005★ 173 cited

New states above charm threshold

Estia J. Eichten, Kenneth Lane, Chris Quigg

We revise and extend expectations for the properties of charmonium states that lie above charm threshold, in light of new experimental information. We refine the Cornell coupled-ch…

hep-ph2005★ 4 cited

Probing Composite Gravity in Colliders

Takemichi Okui

We explore scenarios in which the graviton is not a fundamental degree of freedom at short distances but merely emerges as an effective degree of freedom at long distances. In gene…

hep-ph2005★ 5 cited

A New Mechanism for Light Composite Higgs Bosons

Kenneth Lane, Adam Martin

Repeated symmetry-breaking and restoration phase transitions occur as one traverses the parameter space of interactions competing to align the vacuum. This phenomenon, augmented wi…

hep-ph2005★ 84 cited

Tensors Mesons in AdS/QCD

Emanuel Katz, Adam Lewandowski, Matthew D. Schwartz

We explore tensor mesons in AdS/QCD focusing on f2 (1270), the lightest spin-two resonance in QCD. We find that the f2 mass and the partial width for f2 -> gamma gamma are in very…

hep-ph2005★ 46 cited

Naturally heavy superpartners and a Little Higgs

Tuhin Roy, Martin Schmaltz

We construct an extension of the MSSM in which scalar superpartners can naturally be as heavy as 1 TeV. In the MSSM, the most significant fine tuning stems from the logarithmically…

hep-ph2005★ 3 cited

Chiral Symmetry Breaking at Nonzero Chemical Potential

J. C. Osborn, K. Splittorff, J. J. M. Verbaarschot

We consider chiral symmetry breaking at nonzero chemical potential and discuss the relation with the spectrum of the Dirac operator. We solve the so called Silver Blaze Problem tha…

hep-ph2005★ 82 cited

Dynamics of Gravity in a Higgs Phase

Nima Arkani-Hamed, Hsin-Chia Cheng, Markus A. Luty +2

We investigate the universal low-energy dynamics of the simplest Higgs phase for gravity, `ghost condensation.' We show that the nonlinear dynamics of the `ghostone' field dominate…

hep-ph2005★ 16 cited

Neutrino Constraints on Spontaneous Lorentz Violation

Yuval Grossman, Can Kilic, Jesse Thaler +1

We study the effect of spontaneous Lorentz violation on neutrinos. We consider two kinds of effects: static effects, where the neutrino acquires a Lorentz-violating dispersion rela…

hep-ph2005★ 14 cited

Testing the dynamics of B -> ππand constraints on α

Yuval Grossman, Andreas Hocker, Zoltan Ligeti +1

In charmless nonleptonic B decays to ππor ρρ, the "color allowed" and "color suppressed" tree amplitudes can be studied in a systematic expansion in \alphas(mb) and Λ/mb. At leadin…

hep-ph2005★ 60 cited

The Effect of Mixing on the Measurement of in Decays

Yuval Grossman, Abner Soffer, Jure Zupan

mixing is the source of the largest theoretical uncertainty in the extraction of from decays. In the Standard Model, the mixing can have a rate close to i…

hep-ph2005★ 97 cited

The Intermediate Higgs

Emanuel Katz, Ann E. Nelson, Devin G. E. Walker

Two paradigms for the origin of electroweak superconductivity are a weakly coupled scalar condensate, and a strongly coupled fermion condensate. The former suffers from a finetunin…

hep-ph2005★ 34 cited

Natural soft leptogenesis

Yuval Grossman, Ryuichiro Kitano, Hitoshi Murayama

Successful soft leptogenesis requires small B-terms for the right-handed sneutrinos and a large CP violating phase between the A- and B-terms. We show that this situation is realiz…

hep-ph2005★ 659 cited

Little Higgs Review

Martin Schmaltz, David Tucker-Smith

Recently there has been renewed interest in the possibility that the Higgs particle of the Standard Model is a pseudo-Nambu-Goldstone boson. This development was spurred by the obs…

hep-ph2005★ 7 cited

Accidental Goldstone Bosons

Kenneth Lane, Adam Martin

We study vacuum alignment in theories in which the chiral symmetry of a set of massless fermions is both spontaneously and explicitly broken. We find that transitions occur between…