Zobrazeno 1 - 10
of 615
pro vyhledávání: '"Volkov, M. P."'
It is shown that the processes $e^+ e^- \to \pi^+ \pi^-$ and $\tau^- \to \pi^- \pi^0 \nu_\tau$ can be described in a unified approach in satisfactory agreement with experiment using the vector coupling constant $g_{\rho} = 6$. In this case, in additi
Externí odkaz:
http://arxiv.org/abs/2407.07986
Autor:
Sobolev, E., Volkov, M., Svirplys, E., Thomas, J., Witting, T., Vrakking, M. J. J., Schütte, B.
The generation of terawatt (TW) near-single-cycle laser pulses is of high interest for applications including attosecond science. Here we demonstrate a three-stage post-compression scheme in a non-guided geometry using He as the nonlinear medium, res
Externí odkaz:
http://arxiv.org/abs/2404.18266
In the framework of the $U(3) \times U(3)$ extended Nambu-Jona-Lasinio model, the processes $e^+e^- \to K^+K^-\pi^0$ and $e^+e^- \to K^+K^-\eta$ are described taking into account both ground and first radially excited intermediate meson states. It is
Externí odkaz:
http://arxiv.org/abs/2404.06329
The $\tau$ lepton decays $\tau \to [K^- K^0 \pi^0, K^- K^+ \pi^-, K ^0 \bar{K^0} \pi^-] \nu_{\tau}$ are described in the $U(3) \times U(3)$ NJL quark model. The contact channel and intermediate channels with axial-vector, vector and pseudoscalar meso
Externí odkaz:
http://arxiv.org/abs/2310.07460
Branching fractions of decays $\tau \to K^0 \pi^- \eta\nu_\tau$, $\tau \to K^- \pi^0 \eta\nu_\tau$, $\tau \to K^-K^0 \eta\nu_\tau$ and $\tau \to K^- \eta \eta \nu_\tau$ are calculated in the $U(3)\times U(3)$ chiral NJL quark model. The contact, vect
Externí odkaz:
http://arxiv.org/abs/2307.09228
The widths of the decays $\tau \to K^- K^+ K^- \nu_\tau$ and $\tau \to K^- K^0 \bar{K}^0 \nu_\tau$ are calculated in the $U(3)\times U(3)$ chiral quark NJL model. Four channels are considered: contact, axial vector, vector and pseudoscalar channels.
Externí odkaz:
http://arxiv.org/abs/2305.09346
The branching fractions of $\tau \to \pi^+ \pi^-\pi^- \nu_\tau$ and $\tau \to \pi^- 2\pi^0\nu_\tau$ are calculated within the chiral NJL model. Features of the axial-vector $a_1$ meson which plays an important role in describing the $\tau$ decays are
Externí odkaz:
http://arxiv.org/abs/2304.09454
The branching fractions of the decays $\tau^- \to K^- \pi^+ \pi^- \nu_\tau$, $\tau^- \to K^- \pi^0 \pi^0 \nu_\tau$ and $\tau^- \to \bar{K}^0 \pi^- \pi^0\nu_\tau$ are calculated in the $U(3)\times U(3)$ Nambu--Jona-Lasinio type chiral model. Four inte
Externí odkaz:
http://arxiv.org/abs/2303.02730
Decays of scalar mesons $K^*_0(800) \to K\pi$ and $K^*_0(1430) \to K\pi, K \eta, K \eta', K_1 \pi$ are described in the extended $U(3 ) \times U(3)$ Nambu - Jona-Lasinio chiral quark model. The obtained results are in satisfactory agreement with the
Externí odkaz:
http://arxiv.org/abs/2210.10557
Autor:
Zhou, D., Semenok, D. V., Volkov, M. A., Troyan, I. A., Seregin, A. Yu., Chepkasov, I. V., Sannikov, D. A., Lagoudakis, P. G., Oganov, A. R., German, K. E.
Publikováno v:
Physical Review B, 004100 (2023)
In this work, we synthesize and investigate lower technetium hydrides at pressures up to 45 GPa using the synchrotron X-ray diffraction, reflectance spectroscopy, and ab initio calculations. In the Tc-H system, the hydrogen content in TcH$_x$ phases
Externí odkaz:
http://arxiv.org/abs/2210.01518