Zobrazeno 1 - 10
of 58
pro vyhledávání: '"Zhevlakov Alexey S."'
Transverse momentum dependence of the $T$-even hadronic structure functions in the Drell-Yan process
We present detailed analysis of the $T$-even lepton angular distribution in the Drell-Yan process including $\gamma/Z^0$ gauge boson exchange and using perturbative QCD based on the collinear factorization scheme at leading order in the $\alpha_s$ ex
Externí odkaz:
http://arxiv.org/abs/2408.01243
Autor:
Gninenko, Sergei N., Kirpichnikov, Dmitry V., Krasnikov, Nikolai V., Kuleshov, Sergey, Lyubovitskij, Valery E., Zhevlakov, Alexey S.
We consider the possibility of discovering a light pseudoscalar particle $a$, which could the axion or an axion-like particle (ALP), interacting mainly with quarks using the electron and photon scattering reaction chain $e + Z \rightarrow e + \gamma
Externí odkaz:
http://arxiv.org/abs/2407.01181
Publikováno v:
Phys. Rev. D 109, 114023 (2024)
We calculate the perturbative $T$-odd contributions to the lepton angular distribution in the Drell-Yan process. Using collinear factorization, we work at the first order in QCD perturbation theory where these contributions appear, ${\cal O}(\alpha_s
Externí odkaz:
http://arxiv.org/abs/2403.18741
Autor:
Gninenko, Sergei N., Kirpichnikov, Dmitry V., Kuleshov, Sergey, Lyubovitskij, Valery E., Zhevlakov, Alexey S.
We consider an experiment to search for dark sector particles in dark photon kinetic mixing model by analyze invisible and semi-invisible decays of neutral mesons $M^0 = \pi^0$, $\eta$, $\eta'$, $\omega$, $f_2(1270)$, produced in the NA64 experiment
Externí odkaz:
http://arxiv.org/abs/2312.01703
Autor:
Zhevlakov, Alexey S., Kirpichnikov, Dmitry V., Gninenko, Sergei N., Kuleshov, Sergey, Lyubovitskij, Valery E.
We test a novel idea of using a $\pi^-$ beam in the fixed-target experiments to search for New Physics in the events with missing energy. Bounds for invisible vector $\rho$ meson decay were derived, analyzed, and compared with the current limits on s
Externí odkaz:
http://arxiv.org/abs/2309.09347
We study possible impact of dark photons on lepton flavor phenomenology. We derive the constraints on non-diagonal dark photon couplings with leptons by analyzing corresponding contributions to lepton anomalous magnetic moments, rare lepton decays an
Externí odkaz:
http://arxiv.org/abs/2307.10771
Publikováno v:
EPJ Web of Conferences, Vol 212, p 07005 (2019)
We complete our derivation of upper limits on the CP violating ηππ and η‘ππ couplings from an analysis of their two-loop contribution to the neutron electric dipole moment (nEDM). As a result we obtain numerical upper limits for the ηππ an
Externí odkaz:
https://doaj.org/article/2e5d71fb3fdb490780ff61a4e0173da8
Publikováno v:
EPJ Web of Conferences, Vol 191, p 02003 (2018)
The data for the upper limit on the electric dipole moment of the neutron (nEDM) can be explained by using different mechanisms beyond the Standard Model (SM). The nEDM can be generated by a CP-violating transition of η and η′ mesons into pion pa
Externí odkaz:
https://doaj.org/article/8a2f77a540bd403db8280058b73f02e5
We study the non-abelian $SU(2)_D$ extension of the $U(1)_D$ Stueckelberg portal, which plays a role of the mediator between the Standard Model (SM) and Dark Sector (DS). This portal is specified by the Stueckelberg mechanism for generation of dark g
Externí odkaz:
http://arxiv.org/abs/2210.05555
The link between ordinary Standard model (SM) photon and both dark photon and axion like particle (ALP) can be introduced through the dark axion portal coupling. Given the dark axion portal setup, in the present paper we refer the dark photon as the
Externí odkaz:
http://arxiv.org/abs/2204.09978