284 research outputs found
Modified top quark condensation model with the extra heavy fermion, the GeV Pseudo - Goldstone boson, and the additional heavy scalar bosons
We discuss the modified top quark condensation model proposed in
\cite{VZ2015}. This construction was inspired by the top - seesaw scenario, in
which the extra heavy fermion is added that may be paired with the top
quark. Besides, this model incorporates the ideas of the Little Higgs scenario,
in which the GeV scalar particle appears as a Pseudo - Goldstone boson.
This model admits (in addition to the GeV scalar boson ) the heavier
scalar excitation . We consider the region of parameters, where its
mass is TeV, the width of is
, while the mass of the heavy fermion
is TeV. We find that in this model the value of the cross -
section for
TeV is essentially smaller than the present experimental upper bound. Besides,
we find, that for the chosen values of parameters there should exist the CP -
even scalar boson with mass and very small width. In
addition, the model predicts the existence of the extra neutral CP even scalar
boson and the charged scalar boson with masses of the order of TeV.Comment: Latex, 20 page
Anomalous transport phenomena and momentum space topology
Using the derivative expansion applied to the Wigner transform of the two -
point Green function this is possible to derive the response of various
nondissipative currents to the external gauge fields. The corresponding
currents are proportional to the momentum space topological invariants. This
allows to analyse systematically various anomalous transport phenomena
including the anomalous quantum Hall effect and the chiral separation effect.
We discuss the application of this methodology both to the solid state physics
and to the high energy physics.Comment: Latex, 8 pages, proceedings of the XXth International Seminar
"Quarks-2018" (27 May 2018 - 2 June 2018, Valday, Russia
Interleukin-2 receptor β chain as a possible target for low doses of mafosfamide
The 7-day cytotoxic lymphocytes (CTL) induced in mixed lymphocyte culture express only the chain of the interleukin-2 receptor (IL-2R). In the present study this fact has been confirmed in a murine semi-allogeneic system. The ability of low doses of mafosfamide (Mf) to affect IL-2-induced CTL proliferation has been demonstrated. It was also shown that IL-2 activated resting suppressor cells. The pretreatment of the suppressor cells with either monoclonal antibodies (mAbs) against the p75 chain of IL-2R, or with Mf abolished the suppressive effect of these cells. No restoration of the proliferative response occurred when the anti-IL-2Rα mAb had been used. Flow cytometry analysis of 7-day CTL was carried out with mAbs against the α and β chains of IL-2R. CTL treatment with Mf inhibited anti-IL-2Rβ mAb binding. It may be assumed that the anti-proliferative effects of Mf which have been demonstrated in this paper, were a result of blocking the IL-2R β chain
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