http://fafnir.phyast.pitt.edu/py3765/walkingTCReview.pdf

Strong dynamics and electroweak symmetry breaking

This chapter of the report of the “Flavor in the era of the LHC” Workshop discusses the theoretical, phenomenological and experimental issues related to flavor phenomena in the charged lepton sector and in flavor conserving CP-violating processes. We review the current experimental limits and the main theoretical models for the flavor structure of fundamental particles. We analyze the phenomenological consequences of the available data, setting constraints on explicit models beyond the standard model, presenting benchmarks for the discovery potential of forthcoming measurements both at the LHC and at low energy, and exploring options for possible future experiments.

/pdf/flavor-physics-of-leptons-and-dipole-moments-26infwadhn.pdf

Flavor physics of leptons and dipole moments

We systematically calculate various flavor-changing neutral-current top-quark processes induced by supersymmetry at the Large Hadron Collider, which include five decay modes and six production channels. To reveal the characteristics of these processes, we first compare the dependence of the rates for these channels on the relevant supersymmetric parameters, then we scan the whole parameter space to find their maximal rates, including all the direct and indirect current experimental constraints on the scharm-stop flavor mixings. We find that, under all these constraints, only a few channels, through cg -> t at parton level and t -> ch, may be observable at the Large Hadron Collider.

Supersymmetry-induced flavor-changing neutral-current top-quark processes at the CERN Large Hadron Collider

The top quark is the heaviest elementary particle observed to date. Its large mass makes the top quark an ideal laboratory to test predictions of perturbation theory concerning heavy quark production at hadron colliders. The top quark is also a powerful probe for new phenomena beyond the Standard Model (SM) of particle physics. In addition, the top quark mass is a crucial parameter for scrutinizing the SM in electroweak precision tests and for predicting the mass of the yet unobserved Higgs boson. Ten years after the discovery of the top quark at the Fermilab Tevatron, top quark physics has entered an era where detailed measurements of top quark properties are undertaken. In this paper an introduction to the phenomenology of top quark production in hadron collisions is given, the lessons learned in Tevatron Run I are summarized and the first Run II results are discussed. A brief outlook of the possibilities of top quark research at the Large Hadron Collider, currently under construction at CERN, is included.

/pdf/top-quark-physics-in-hadron-collisions-1tkfdpidnl.pdf

Top quark physics in hadron collisions

Unparticles and Muon Decay

Non-universal gauge bosons Z′ and lepton flavor-violating tau decays

There are many models beyond the standard model predicting the existence of non-universal gauge bosons $Z^{\prime}$, which can give rise to very rich phenomena. We calculate the contributions of the non-universal gauge bosons $Z^{\prime}$, predicted by topcolor-assisted technicolor (TC2) models and flavor-universal TC2 models, to the lepton flavor-violation tau decays $\tau\to l_{i}\gamma$ and $\tau\to l_{i}l_{j}l_{k}$. We find that the branching ratio $B_{r}(\tau\longrightarrow l_{i}l_{j}l_{k})$ is larger than that of the process $\tau\longrightarrow l_{i}\gamma$ in all of the parameter space. Over a sizable region of the parameter space, we have $B_{r}(\tau\longrightarrow l_{i}l_{j}l_{k})\sim 10^{-8}$, which may be detected in the future experiments.

Non-universal gauge bosons $Z^{\prime}$ and lepton flavor-violation tau decays

Lepton flavor violating Z→lilj in flavor-universal topcolor-assisted technicolor

The flavor-changing rare top decays t→cVV in topcolor-assisted technicolor theory

We consider the flavor changing neutral current (FCNC) process e(+)e(-) --> (t) over barc (or t (c) over bar) in the context of topcolor-assisted technicolor (TC2) models. We find that the contributions of charged scalars (technipions and top-pions) and topcolor gauge bosons are negligibly small. The neutral scalars (top-pion pi(t)(0) and top-Higgs h(t)(0)) can give significant contributions to this process. With reasonable values of the parameters in TC2 models, there will be several tens of the observable is events to be generated in the future e(+)e(-) linear colliders. (C) 2002 Elsevier Science B.V. All tights reserved.

Chongxing Yue

Papers

Non-universal gauge bosons Z′ and lepton flavor-violating tau decays

Non-universal gauge bosons $Z^{\prime}$ and lepton flavor-violation tau decays

Lepton flavor violating Z→lilj in flavor-universal topcolor-assisted technicolor

The flavor-changing rare top decays t→cVV in topcolor-assisted technicolor theory

The process e(+)e(-)->(t)over-bar-c in topcolor-assisted technicolor models