Publications (169)303.88 Total impact
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ABSTRACT: Determination of the proton charge radius by different methods has produced an inconsistency. The most precise value (from spectroscopy of muonic hydrogen) strongly disagrees with three less accurate values (from spectroscopy of ordinary hydrogen and deuterium, from relative measurements of the cross section of the elastic electronproton scattering at MAMI and from evaluation of the world data on absolute measurements of ep cross sections). Here, we question the accuracy of the determination of the proton charge radius by means of spectroscopy of ordinary hydrogen and deuterium and demonstrate that its accuracy was probably overestimated. In particular, we revisit determination from each relevant transition and find that the results of two optical experiments, which are the most statistically important, are not perfectly consistent. The inconsistency is rather a `tension' between the results than their discrepancy, however, it implies that a more conservative estimation of the uncertainty is needed. With the more realistic estimation of the uncertainty, the results for the proton charge radius from spectroscopy of ordinary and muonic atoms are rather in fair agreement.10/2014;  [Show abstract] [Hide abstract]
ABSTRACT: To date the magnetic radius of the proton has been determined only by means of electronproton scattering, which is not free of controversies. Any existing atomic determinations are irrelevant because they are strongly modeldependent. We consider a socalled Zemach contribution to the hyperfine interval in ordinary and muonic hydrogen and derive a selfconsistent modelindependent value of the magnetic radius of the proton. More accurately, we constrain not a value of the magnetic radius by itself, but its certain combination with the electriccharge radius of the proton, namely, R_E^2+R_M^2. The result from the ordinary hydrogen is found to be R_E^2+R_M^2=1.35(12) fm^2, while the derived muonic value is 1.49(18) fm^2. That allows us to constrain the value of the magnetic radius of proton R_M=0.78(8) fm at the 10% level.Physical Review D 05/2014; 90(5). · 4.86 Impact Factor 
Article: A selfconsistent value of the electric radius of the proton from the Lamb shift in muonic hydrogen
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ABSTRACT: Recently a highprecision measurement of the Lamb shift in muonic hydrogen has been performed. An accurate value of the proton charge radius can be extracted from this datum with a high accuracy. To do that a sufficient accuracy should be achieved also on the theoretical side, including an appropriate treatment of higherorder protonstructure effects. Here we consider a higherorder contribution of the finite size of the proton to the Lamb shift in muonic hydrogen. Only modeldependent results for this correction have been known up to date. Meantime, the involved models are not consistent either with the existing experimental data on the electronproton scattering or with the value for the electric charge radius of the proton extracted from the Lamb shift in muonic hydrogen. We consider the higherorder contribution of the proton finite size in a modelindependent way and eventually derive a selfconsistent value of the electric radius of the proton. The reevaluated value of the proton charge radius is found to be R_E=0.84022(56) fm.Physical Review D 05/2014; 90(5). · 4.86 Impact Factor  [Show abstract] [Hide abstract]
ABSTRACT: Adjusting a previously developed Grotchtype approach to a perturbative calculation of the electronic vacuumpolarization effects in muonic atoms, we find here the twoloop vacuum polarization relativistic recoil correction of order $\alpha^2(Z\alpha)^4m^2/M$ in light muonic atoms. The result is in perfect agreement with the one previously obtained within the Breittype approach. We also discuss here simple approximations of the irreducible part of the twoloop vacuumpolarization dispersion density, which was applied to test our calculations and can be useful for other evaluations with an uncertainty better than 1%.Physical Review A 11/2013; 89(3). · 2.99 Impact Factor  [Show abstract] [Hide abstract]
ABSTRACT: Corrections to energy levels in light muonic atoms are investigated in order $\alpha^2(Z\alpha)^4m$. We pay attention to corrections which are specific for muonic atoms and include the electron vacuum polarization loop. In particular, we calculate relativistic and relativisticrecoil twoloop electron vacuum polarization contributions. The results are obtained for the levels with $n=1,2$ and in particular for the Lamb shift ($2p_{1/2}2s_{1/2}$) and finestructure intervals ($2p_{3/2}2p_{1/2}$) in muonic hydrogen, deuterium, and muonic helium ions.Physical Review D 11/2013; · 4.86 Impact Factor  [Show abstract] [Hide abstract]
ABSTRACT: We continue our account of relativistic recoil effects in muonic atoms and present explicitly analytic results at first order in electronvacuumpolarization effects. The results are obtained within a Grotchtype approach based on an effective Dirac equation. Some expressions are cumbersome and we investigate their asymptotic behavior. Previously relativistic twobody effects due to the oneloop electron vacuum polarization were studied by several groups. Our results found here are consistent with the previous result derived within a Breittype approach (including ours) and disagree with a recent attempt to apply a Grotchtype approach.Physical Review A 11/2013; 89(2). · 2.99 Impact Factor 
Article: Relativistic recoil effects in a muonic atom within a Grotchtype approach: General approach
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ABSTRACT: Recently we calculated relativistic recoil corrections to the energy levels of the low lying states in muonic hydrogen induced by electron vacuum polarization effects. The results were obtained by Breittype and Grotchtype calculations. The former were described in our previous papers in detail, and here we present the latter. The Grotch equation was originally developed for pure Coulomb systems and allowed to express the relativistic recoil correction in order $(Z\alpha)^4m^2/M$ in terms of the relativistic nonrecoil contribution $(Z\alpha)^4m$. Certain attempts to adjust the method to electronic vacuum polarization took place in the past, however, the consideration was incomplete and the results were incorrect. Here we present a Grothtype approach to the problem and in a series of papers consider relativistic recoil effects in order $\alpha(Z\alpha)^4m^2/M$ and $\alpha^2(Z\alpha)^4m^2/M$. That is the first paper of the series and it presents a general approach, while two other papers present results of calculations of the $\alpha(Z\alpha)^4m^2/M$ and $\alpha^2(Z\alpha)^4m^2/M$ contributions in detail. In contrast to our previous calculation, we address now a variety of states in muonic atoms with a certain range of the nuclear charge $Z$.Physical Review A 11/2013; 89(2). · 2.99 Impact Factor 
Article: Recent progress in determination of fundamental constants and fundamental physics at low energies
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ABSTRACT: A brief overview on determination of the values of fundamental constants by means of atomic physics is given. Recommended values of CODATA2010 least square adjustment are discussed as well as the related input data.Annalen der Physik 07/2013; 525(7). · 1.51 Impact Factor  [Show abstract] [Hide abstract]
ABSTRACT: The relativistic recoil contributions to the Uehling corrections are revisited. A controversy in recent calculations is considered, which is based on different approaches including Breittype and Grotchtype calculations. It is found that calculations in those works were in fact done in different gauges and in some of those gauges contributions to retardation and twophotonexchange effects were missed. Such effects are evaluated and a consistent result is obtained. A correct expression for the Grotchtype approach is presented, which produces a correct gaugeinvariant result. A finitenuclearsize correction for the Uehling term is also considered. The results are presented for muonic hydrogen and deuterium atoms and for muonic 3He and 4He ions.Physical Review A 03/2012; 85(3). · 2.99 Impact Factor  [Show abstract] [Hide abstract]
ABSTRACT: A possibility to constrain axionlike particles from precision atomic physics is considered.Physical Review A 12/2011; 84. · 2.99 Impact Factor  [Show abstract] [Hide abstract]
ABSTRACT: A constraint on a spindependent interaction, induced by a pseudovector light boson, is presented. The interaction includes a Yukawatype contribution α″(s1·s2)eλr/r and a contact spinspin term. To disentangle the longrange and contact terms we utilize experimental data on the 1s and 2s hyperfine intervals for light twobody atoms and construct a specific difference 8×Ehfs(2s)Ehfs(1s). That allows one to constrain the spindependent coupling constant α″ of an electronnucleus Yukawatype interaction in hydrogen, deuterium, and the helium3 ion at the level below a part in 1016. The derived constraint is related to the range of masses below 4 keV/c2. The combined constraint including the contact terms is also presented.Physical Review A 06/2011; 83(6). · 2.99 Impact Factor  [Show abstract] [Hide abstract]
ABSTRACT: The results for the total multiphoton decay rates of the 3p and 4s levels of hydrogen, presented by D. Solovyev and L. Labzowsky within the cascade approximation, are revisited. The corrected results for certain decay channels differ from original ones of those authors sometimes by order of magnitude. Some aspects with respect to the cosmological recombination process are clarified.04/2011;  [Show abstract] [Hide abstract]
ABSTRACT: We calculate vacuumpolarization corrections to the gfactor of a bound electron in the ground state of a hydrogenlike atom. The result is found in a closed analytic form for an arbitrary value of the nuclear charge Z. It is valid for both electronic and muonic atoms. Some useful asymptotics are also presented. The result for the electronic atoms is consistent with published numerical data. PACS Nos.: 31.30JvCanadian Journal of Physics 02/2011; 79(1):8186. · 0.93 Impact Factor  [Show abstract] [Hide abstract]
ABSTRACT: Nuclear magnetic resonance (NMR) spectroscopy of hydrogen deuteride (HD) is an attractive tool for a determination of the protontodeuteron ratio of magnetic moments. Potentially, it may provide a result an order of magnitude more accurate than the present value based on the study of atomic hydrogen and deuterium. NMR spectroscopy does not deal with single molecules but with a molecular gas and here we study the pressure dependence of the results.PACS Nos.: 12.20Ds, 21.20Ky, 27.10+h, 31.30Gs, 76.60Cq, 82.56HgCanadian Journal of Physics 02/2011; 83(4):405412. · 0.93 Impact Factor  [Show abstract] [Hide abstract]
ABSTRACT: Contributions to the energy levels in light muonic atoms and, in particular, to the Lamb shift fall into a few welldistinguished classes. The related diagrams are calculated using different approaches. In particular, there is a specific type of nonrelativistic (NR) contribution. Here, we consider such corrections to the Lamb shift of order α5mμ. These contributions are due to free vacuumpolarization loops as well as to various effects of lightbylight scattering. The closed loop in the related diagrams is an electronic one, which allows an NR consideration of the muon. Both types of contributions have been known for some time, however, the results obtained to date are only partial results. We complete a calculation of the α5mμ contributions for muonic hydrogen. The results are also adjusted for muonic deuterium atom and helium ion.Physical Review A 06/2010; · 2.99 Impact Factor 
Article: Precision physics of simple atoms and constraints on a light boson with ultraweak coupling.
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ABSTRACT: Constraint on spindependent and spinindependent Yukawa potential at atomic scale is developed. That covers constraints on a coupling constant of an additional photon γ* and a pseudovector boson. The mass range considered is from 1 eV/c2 to 1 MeV/c2. The strongest constraint on a coupling constant α' is at the level of a few parts in 10913) (for γ*) and below one part in 10(16) (for a pseudovector) corresponding to mass below 1 keV/c2. The constraints are derived from lowenergy tests of quantum electrodynamics and are based on spectroscopic data on light hydrogenlike atoms and experiments with magnetic moments of leptons and light nuclei.Physical Review Letters 06/2010; 104(22):220406. · 7.73 Impact Factor  [Show abstract] [Hide abstract]
ABSTRACT: Constraints on a spinindependent interaction by exchange of a neutral light boson are derived from precision data on the electron anomalous magnetic moment and from atomic spectroscopy of hydrogen and deuterium atoms. The mass range from $1 $eV$/c^2$ to $1 $Mev$/c^2$ is studied and the effective coupling constant $\alpha^\prime$ is allowed below the level of $10^{11}  10^{13}$ depending on the value of the boson mass. The mass range corresponds to the Yukawa radius from 0.0002 nm to 20 nm, which covers the distances far above and far below the Bohr radius of the hydrogen atom. Comment: A cross reference to Arxiv is updated (arXiv:1005.4859)Physical review D: Particles and fields 05/2010;  [Show abstract] [Hide abstract]
ABSTRACT: The complete contribution of diagrams with the lightbylight scattering to the Lamb shift is found for muonic hydrogen, deuterium and helium ion. The results are obtained in the staticmuon approximation and a part of the paper is devoted to the verification of this approximation and analysis of its uncertainty.JETP Letters 05/2010; 92(1):814. · 1.36 Impact Factor  [Show abstract] [Hide abstract]
ABSTRACT: We present a phenomenological constraint on a pseudovector light boson beyond the Standard Model, which can induce a longrange spindependent interaction $\alpha^{\prime\prime}({\bf s}_1\cdot{\bf s}_2)\,{\rm e}^{\lambda r}/r$. In the range of masses from $4\;{\rm keV}/c^2$ to those related to macroscopic distances (of $\lambda^{1}\sim1\;$cm) the spindependent coupling constant $\alpha^{\prime\prime}$ of the electronmuon interaction is constrained at the level below a part in $10^{15}$. The constraint is weakened while extending to higher masses. The strongest constraint is related to the leptonlepton interaction. Constraints on spindependent interactions of some other particles are also discussed. The results are obtained from data on the HFS interval of the ground state in muonium and a few other light hydrogenlike atoms.Physical review D: Particles and fields 05/2010; 82(7).  [Show abstract] [Hide abstract]
ABSTRACT: Contributions to the energy levels in light muonic atoms and, in particular, to the Lamb shift fall into a few welldistinguished classes. The related diagrams are calculated using different approaches. In particular, there is a specific type of nonrelativistic (NR) contribution. Here, we consider such corrections to the Lamb shift of order Î±âµm{sub Î¼.} These contributions are due to free vacuumpolarization loops as well as to various effects of lightbylight scattering. The closed loop in the related diagrams is an electronic one, which allows an NR consideration of the muon. Both types of contributions have been known for some time, however, the results obtained to date are only partial results. We complete a calculation of the Î±âµm{sub Î¼}contributions for muonic hydrogen. The results are also adjusted for muonic deuterium atom and helium ion.Physical Review A  PHYS REV A. 01/2010; 81(6):060501060501.
Publication Stats
2k  Citations  
303.88  Total Impact Points  
Top Journals
 Physical Review A (19)
 Canadian Journal of Physics (15)
 Physics Letters B (12)
 Lecture Notes in Physics (10)
 Physics of Atomic Nuclei (10)
Institutions

2013

Pulkovo Observatory
SanktPeterburg, St.Petersburg, Russia


2004–2013

Max Planck Institute of Quantum Optics
Arching, Bavaria, Germany 
University of New South Wales
 School of Physics
Kensington, New South Wales, Australia


2010

Max Planck Society
München, Bavaria, Germany


1991–2009

D.I. Mendeleyev Institute for Metrology
SanktPeterburg, St.Petersburg, Russia


1989–1995

FGUP UNIIM
Sverolovsk, Sverdlovsk, Russia


1993

Petersburg Nuclear Physics Institute
Krasnogwardeisk, Leningrad, Russia
