V. I. Kuksa

Near-threshold w-pair production in the model of unstable particles with smeared mass

Near-threshold production of charged boson pairs is considered within the framework of the model of unstable particles with smeared mass. The results of calculations are in good agreement with LEP II data and Monte Carlo simulations. Suggested approach significantly simplifies calculations with respect to standard perturbative one.

Chiral-symmetric technicolor with standard model Higgs boson

Most of the traditional technicolor-based models are known to be in a strong tension with the electroweak precision tests. We show that this serious issue is naturally cured in strongly coupled sectors with chiral-symmetric vectorlike gauge interactions in the framework of the gauged linear sigma model. We discuss possible phenomenological implications of such a nonstandard chiral-symmetric technicolor scenario in its simplest formulation preserving the standard model (SM) Higgs mechanism. For this purpose, we assume the existence of an extra technifermion sector confined under extra SU(3)(TC) at the energy scales reachable at the LHC, Lambda(TC) similar to 0: 1-1 TeV and interacting with the SM gauge bosons in a chiral-symmetric (vectorlike) way. In the framework of this scenario, the SM Higgs vacuum expectation value acquires a natural interpretation in terms of the condensate of technifermions in confinement in the nearly conformal limit. We study the influence of the lowest-lying composite physical states, namely, technipions, technisigma, and constituent technifermions, on the Higgs sector properties in the SM and other observables at the LHC. We find that the predicted Higgs boson signal strengths in gamma gamma, vector-boson VV*, and fermion f (f) over bar decay channels can be sensitive to the new strongly coupled dynamics and are consistent with the current SM-like Higgs boson observations in the limit of relatively small Higgs-technisigma mixing. At the same time, the chiral-symmetric technicolor provides us with rich technipion phenomenology at the LHC, and its major implications are discussed in detail. (Less)

ERRATA: "FINITE-WIDTH EFFECTS IN THE MODEL OF UNSTABLE PARTICLES WITH A SMEARED MASS"

The quantum field model of unstable particles with a smeared mass is suggested to describe the finite-width effects. Within the framework of this model, we derive the convolution formula for a width and factorized formula for a cross-section. The phenomenological consequences of the mass smearing is discussed in the various fields of particle physics.

Vector-like technineutron Dark Matter: is a QCD-type Technicolor ruled out by XENON100?

One of the specific predictions of a new strongly coupled dynamics at a TeV scale is the existence of stable vector-like technibaryon states so that the lightest neutral one could serve as a Dark Matter candidate. We study the latter hypothesis in the QCD-type technicolor with

FACTORIZATION EFFECTS IN A MODEL OF UNSTABLE PARTICLES

\mathrm{SU}(3)_\mathrm{TC}

Near-threshold boson pair production in the model of smeared-mass unstable particles

SU(3)TC confined group and one

ERRATA: "FACTORIZED FORMULA FOR THE CROSS-SECTION OF TWO-PARTICLE SCATTERING"

\mathrm{SU}(2)_\mathrm{W}