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pro vyhledávání: '"Eides, Michael I."'
Autor:
Eides, Michael I.
Energy levels of hydrogen are calculated as one-loop matrix elements of the QED energy-momentum tensor trace in the external field approximation. An explicit connection established between the one-loop trace diagrams and the standard Lamb shift one-l
Externí odkaz:
http://arxiv.org/abs/2407.00089
Autor:
Eides, Michael I., Shelyuto, Valery A.
We calculate hard spin-independent contributions to energy levels in muonium and positronium which are due to radiatively corrected electron factor insertion in two-photon exchange diagrams. Calculation of these corrections is motivated by the new ro
Externí odkaz:
http://arxiv.org/abs/2306.07748
Autor:
Eides, Michael I.
Electron mass is considered as a matrix element of the energy-momentum trace in the rest frame. The one-loop diagrams for this matrix element are different from the textbook diagrams for the electron mass renormalization. We clarify connection betwee
Externí odkaz:
http://arxiv.org/abs/2301.02883
Autor:
Eides, Michael I., Shelyuto, Valery A.
Hard spin-independent three-loop radiative contributions to energy levels in positronium generated by the two-photon-exchange diagrams with one-loop radiative insertions in the fermion lines and exchanged photons are calculated. This is a next step i
Externí odkaz:
http://arxiv.org/abs/2203.07515
Autor:
Eides, Michael I., Shelyuto, Valery A.
We calculate hard spin-independent three-loop radiative corrections to energy levels in muonium and positronium which are due to radiative insertions in two-photon exchange diagrams. These corrections could be relevant for the new generation of preci
Externí odkaz:
http://arxiv.org/abs/2110.13279
Publikováno v:
Mod. Phys. Lett. A 35, No. 18, 2050151 (2020)
New LHCb Collaboration results on pentaquarks with hidden charm [1] are discussed. These results fit nicely in the hadrocharmonium pentaquark scenario [2,3]. In the new data the old LHCb pentaquark $P_c(4450)$ splits into two states $P_c(4440)$ and $
Externí odkaz:
http://arxiv.org/abs/1904.11616
Autor:
Eides, Michael I.
In the last twenty years, the theory of hyperfine splitting in muonium developed without any experimental input. Finally, this situation is changing and a new experiment on measuring hyperfine splitting in muonium is now in progress at J-PARC. The go
Externí odkaz:
http://arxiv.org/abs/1812.10881
Autor:
Eides, Michael I., Petrov, Victor Yu.
Publikováno v:
Phys. Rev. D 98, 114037 (2018)
We consider decays of the hidden charm LHCb pentaquarks in the hadrocharmonium and molecular scenarios. In both pictures the LHCb pentaquarks are essentially nonrelativistic bound states. We develop a semirelativistic framework for calculation of the
Externí odkaz:
http://arxiv.org/abs/1811.01691
We consider hidden charm pentaquarks as hadroquarkonium states in a QCD inspired approach. Pentaquarks arise naturally as bound states of quarkonia excitations and ordinary baryons. The LHCb $P_c(4450)$ pentaquark is interpreted as a $\psi'$-nucleon
Externí odkaz:
http://arxiv.org/abs/1709.09523