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21.
V. V. Braguta P. V. Buividovich T. Kalaydzhyan S. V. Kuznetsov M. I. Polikarpov 《Physics of Atomic Nuclei》2012,75(4):488-492
We study some properties of the non-Abelian vacuum induced by strong external magnetic field. We perform calculations in the
quenched SU(3) lattice gauge theory with tadpole-improved Lüscher-Weisz action and chirally invariant lattice Dirac operator. The following
results are obtained: The chiral symmetry breaking is enhanced by the magnetic field. The chiral condensate depends on the
strength of the applied field as a power function with exponent ν = 1.6 ± 0.2. There is a paramagnetic polarization of the vacuum. The corresponding susceptibility and other magnetic properties
are calculated and compared with the theoretical estimations. There are nonzero local fluctuations of the chirality and electromagnetic
current, which grow with the magnetic field strength. These fluctuations can be a manifestation of the Chiral Magnetic Effect. 相似文献
22.
The T-odd correlation
in the decays K
+ → π
0
l
+
νγ (l = e, μ) is investigated as a function of the parameters of the effective Lagrangian. It is shown that the T-odd correlation offers a good indicator of new physics in the vector and pseudovector sectors of the model under consideration.
In the scalar and pseudoscalar sectors, investigation of the T-odd correlation gives no way to improve the current limits on the parameters of various extensions of the Standard Model.
__________
Translated from Yadernaya Fizika, Vol. 67, No. 5, 2004, pp. 1025–1032.
Original Russian Text Copyright ? 2004 by Braguta, Likhoded, Chalov. 相似文献
23.
The \(e^ + e^ - \to b\bar bv\bar v\) process, where υ is an electron, muon, or τ-lepton neutrino, is analyzed in detail for the general form of the coupling constant of a Higgs boson with b quarks, with the (m b /v)(a+Iγ5b) parameterization of the \(Hb\bar b\) interaction. This process is shown to be highly sensitive to this coupling constant. Experiments at the future with \(\sqrt s = 500 - GeV\) linear collider will provide limits of 2 and 20% for deviations of the parameters a and b, respectively, from their Standard Model values. Results concerning the \(e^ + e^ - \to b\bar bv\bar v\) process in combination with the independent measurements of the partial width \(\Gamma _{H \to b\bar b}\) can testify to the CP origin of the Higgs sector of the theory. 相似文献