S. G. Karshenboim

Pulkovo Observatory, Sankt-Peterburg, St.-Petersburg, Russia

Are you S. G. Karshenboim?

Claim your profile

Publications (174)271.04 Total impact

  • Source
    Savely G. Karshenboim
    [Show abstract] [Hide abstract]
    ABSTRACT: To date the magnetic radius of the proton has been determined only by means of electron-proton scattering, which is not free of controversies. Any existing atomic determinations are irrelevant because they are strongly model-dependent. We consider a so-called Zemach contribution to the hyperfine interval in ordinary and muonic hydrogen and derive a self-consistent model-independent 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 electric-charge 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.
    05/2014;
  • Source
    Savely G. Karshenboim
    [Show abstract] [Hide abstract]
    ABSTRACT: Recently a high-precision 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 higher-order proton-structure effects. Here we consider a higher-order contribution of the finite size of the proton to the Lamb shift in muonic hydrogen. Only model-dependent 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 electron-proton scattering or with the value for the electric charge radius of the proton extracted from the Lamb shift in muonic hydrogen. We consider the higher-order contribution of the proton finite size in a model-independent way and eventually derive a self-consistent value of the electric radius of the proton. The re-evaluated value of the proton charge radius is found to be R_E=0.84022(56) fm.
    05/2014;
  • Source
    Savely G. Karshenboim, Evgeny Yu. Korzinin, Vladimir G. Ivanov
    [Show abstract] [Hide abstract]
    ABSTRACT: Adjusting a previously developed Grotch-type approach to a perturbative calculation of the electronic vacuum-polarization effects in muonic atoms, we find here the two-loop 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 Breit-type approach. We also discuss here simple approximations of the irreducible part of the two-loop vacuum-polarization dispersion density, which was applied to test our calculations and can be useful for other evaluations with an uncertainty better than 1%.
    11/2013; 89(3).
  • Source
    Evgeny Yu. Korzinin, Vladimir G. Ivanov, Savely G. Karshenboim
    [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 relativistic-recoil two-loop 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 fine-structure intervals ($2p_{3/2}-2p_{1/2}$) in muonic hydrogen, deuterium, and muonic helium ions.
    Physical Review D 11/2013; · 4.69 Impact Factor
  • Source
    Vladimir G. Ivanov, Evgeny Yu. Korzinin, Savely G. Karshenboim
    [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 electron-vacuum-polarization effects. The results are obtained within a Grotch-type approach based on an effective Dirac equation. Some expressions are cumbersome and we investigate their asymptotic behavior. Previously relativistic two-body effects due to the one-loop electron vacuum polarization were studied by several groups. Our results found here are consistent with the previous result derived within a Breit-type approach (including ours) and disagree with a recent attempt to apply a Grotch-type approach.
    11/2013; 89(2).
  • Source
    Savely G. Karshenboim, Vladimir G. Ivanov, Evgeny Yu. Korzinin
    [Show abstract] [Hide abstract]
    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 Breit-type and Grotch-type 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 non-recoil 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 Groth-type 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 $Z$.
    11/2013; 89(2).
  • Source
    Savely G. Karshenboim
    [Show abstract] [Hide abstract]
    ABSTRACT: A brief overview on determination of the values of fundamental constants by means of atomic physics is given. Recommended values of CODATA-2010 least square adjustment are discussed as well as the related input data.
    Annalen der Physik 07/2013; 525(7). · 1.51 Impact Factor
  • Source
    Savely G. Karshenboim, Vladimir G. Ivanov, Evgeny Yu. Korzinin
    [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 Breit-type and Grotch-type 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 two-photon-exchange effects were missed. Such effects are evaluated and a consistent result is obtained. A correct expression for the Grotch-type approach is presented, which produces a correct gauge-invariant result. A finite-nuclear-size 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). · 3.04 Impact Factor
  • S. G. Karshenboim
    [Show abstract] [Hide abstract]
    ABSTRACT: A constraint on a spin-dependent interaction, induced by a pseudovector light boson, is presented. The interaction includes a Yukawa-type contribution α″(s1·s2)e-λr/r and a contact spin-spin term. To disentangle the long-range and contact terms we utilize experimental data on the 1s and 2s hyperfine intervals for light two-body atoms and construct a specific difference 8×Ehfs(2s)-Ehfs(1s). That allows one to constrain the spin-dependent coupling constant α″ of an electron-nucleus Yukawa-type interaction in hydrogen, deuterium, and the helium-3 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). · 3.04 Impact Factor
  • Source
    S. G. Karshenboim, V. G. Ivanov, J. Chluba
    [Show abstract] [Hide abstract]
    ABSTRACT: The results for the total multi-photon 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;
  • S G Karshenboim, V G Ivanov, V M Shabaev
    [Show abstract] [Hide abstract]
    ABSTRACT: We calculate vacuum-polarization corrections to the g-factor 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.: 31.30Jv
    Canadian Journal of Physics 02/2011; 79(1):81-86. · 0.90 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 proton-to-deuteron 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, 82.56Hg
    Canadian Journal of Physics 02/2011; 83(4):405-412. · 0.90 Impact Factor
  • Source
    S. G. Karshenboim, V. V. Flambaum
    [Show abstract] [Hide abstract]
    ABSTRACT: A possibility to constrain axionlike particles from precision atomic physics is considered.
    Physical Review A 01/2011; 84. · 3.04 Impact Factor
  • Savely G. Karshenboim, V. G. Ivanov, E. Y. Korzinin, V. A. Shelyuto
    [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 well-distinguished 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 vacuum-polarization loops as well as to various effects of light-by-light 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; · 3.04 Impact Factor
  • Source
    S G Karshenboim
    [Show abstract] [Hide abstract]
    ABSTRACT: Constraint on spin-dependent and spin-independent 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 low-energy 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
  • Source
    S. G. Karshenboim
    [Show abstract] [Hide abstract]
    ABSTRACT: Constraints on a spin-independent 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;
  • Source
    S. G. Karshenboim
    [Show abstract] [Hide abstract]
    ABSTRACT: A constraint on a long-range spin-dependent interaction $\alpha^{\prime\prime}({\bf s}_1\cdot{\bf s}_2)\,{\rm e}^{-\lambda r}/r$, which can be induced by a pseudovector light boson, is presented. We study theoretical and experimental data on a specific difference $8\times E_{\rm hfs}(2s)-E_{\rm hfs}(1s)$ for light two-body atoms. The spin-dependent coupling constant $\alpha^{\prime\prime}$ of electron-nucleus interaction in hydrogen, deuterium and helium-3 ion is constrained at the level below a part in $10^{16}$. The derived constraints are related to the range of masses below $4\;{\rm keV}/c^2$.
    05/2010;
  • Source
    [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 well-distinguished classes. The related diagrams are calculated using different approaches. In particular, there is a specific kind of non-relativistic contributions. Here we consider such corrections to the Lamb shift in order $\alpha^5m_\mu$. These contributions are due to free vacuum polarization loops as well as to various effects of light-by-light scattering. The closed loop in the related diagrams is an electronic one, which allows a non-relativistic consideration of the muon. Both kinds of contributions have been known for a while, however, the results obtained up to date are only partial ones. We complete a calculation of the $\alpha^5m_\mu$ contributions for muonic hydrogen. The results are also adjusted for muonic deuterium and muonic helium ion. Comment: 4 pages, 3 figures; cross-refs upgraded
    05/2010;
  • Source
    S. G. Karshenboim
    [Show abstract] [Hide abstract]
    ABSTRACT: We present a phenomenological constraint on a pseudovector light boson beyond the Standard Model, which can induce a long-range spin-dependent 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 spin-dependent coupling constant $\alpha^{\prime\prime}$ of the electron-muon 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 lepton-lepton interaction. Constraints on spin-dependent 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 hydrogen-like 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 well-distinguished 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 α⁵m{sub μ.} These contributions are due to free vacuum-polarization loops as well as to various effects of light-by-light 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 α⁵m{sub μ}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):060501-060501.

Publication Stats

2k Citations
271.04 Total Impact Points

Institutions

  • 2013
    • Pulkovo Observatory
      Sankt-Peterburg, 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
    • Physikalisch-Technische Bundesanstalt
      Brunswyck, Lower Saxony, Germany
  • 2010
    • Max Planck Society
      München, Bavaria, Germany
  • 1991–2009
    • D.I. Mendeleyev Institute for Metrology
      Sankt-Peterburg, St.-Petersburg, Russia
  • 2007
    • University of Alberta
      • Department of Physics
      Edmonton, Alberta, Canada
  • 2006
    • Novosibirsk State University
      Novo-Nikolaevsk, Novosibirsk, Russia
  • 2002
    • Budker Institute of Nuclear Physics
      Novo-Nikolaevsk, Novosibirsk, Russia
  • 1999
    • Saint Petersburg State University
      Sankt-Peterburg, St.-Petersburg, Russia
  • 1998
    • National Institute of Standards and Technology
      Maryland, United States
    • Technische Universität Dresden
      • Institut für theoretische Physik
      Dresden, Saxony, Germany
  • 1989–1995
    • FGUP UNIIM
      Sverolovsk, Sverdlovsk, Russia
  • 1993
    • Petersburg Nuclear Physics Institute
      Krasnogwardeisk, Leningrad, Russia