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HEPD Seminars (Tuesdays) and Joint HEPD-THD Seminars (Thursdays)

HIGH ENERGY PHYSICS DIVISION                  ( Switch to russian version of HEPD Seminars HEPD Seminars - Russian version)

       Past HEPD Seminars in:   2023;    2022;    2021;    2020;    2019;    2018;    2017;    2016;    2015;    2014;    2013;    2012;    2011;    2010;    2009;    2008;    2007;    2006;    2005;    2004;    2003;   

  • Next seminar:    
    Topic:   " Neutrino Physics: Modern Status, Anomalies, Perspectives. "  
    Speaker:   Yu.G. Kudenko   (INR of RAS, Moskow)
    Place:  PNPI, Building 7, small conference hall).
    Time:   April 23 of 2024 year, Seminar: 10:30.

  • Contact persons:  
    Dr. Sergey I. Manaenkov    (Phone: +7 (813 71) 46196   or  e-mail )



  • PNPI seminars:  

    Topic:  Ultra-high energy neutrinos are proposed to be studied at Lake Vostok in Antarctica - Speech at the institute-wide seminar".
    Speaker:   А.A.Zakharov (PNPI NRC KI-OPR, Gatchina).
    Place:  PNPI, Building 7, Main Conference Hall .
    Time:   September 26,   2023.

  • Topic:  Studies of exotic nuclei at the ACCULINNA-2 facility. Prospects for low-energy nuclear physics in the Russian Federation - Grigorenko-Gatchina-2022.pdf".
    Speaker:   Academician of the RAS L.V.Grigorenko (JINR, Dubna).
    Place:  PNPI, Building 7, Main Conference Hall .
    Time:   September 22,   2022,   at   11:00.

  • Topic:  "Laser ion source: history, status, prospects." ( Speech at a meeting of the Academic Council - Barzakh_RILIS-2020.pdf).
    Speaker:   A.E.Barzakh (PNPI NRC KI, Gatchina).
    Place:  PNPI, Building 7, Main Conference Hall .
    Time:   October 22,   2020,   at   15:00.

  • Topic:  "Periodic Table after 150 years: superheavy elements." (Abstract in the format pdf=180 kb,   More about the seminar)
    Speaker:   Academician of the RAS Y.TS. Oganesyan (Laboratory of Nuclear Reactions to them. G.N. Flerov Joint Institute for Nuclear Research (JINR)).
    Place:  PNPI, Building 7, Main Conference Hall .
    Time:   June 5,   2019,   at   15:00.

  • Topic:  "Study on muon channel of Swiss meson facility. Muon catalysis of nuclear dd and dt fusion. Muon capture by light hydrogen nuclei." (Report in the format pdf=12 Mb)
    Speaker:   A.A.Vorobyov (PNPI NRC KI, Gatchina).
    Place:  PNPI, Building 7. Main Conference Hall
    Time:   February 21,   2013,   at   11:00


  • Joint seminar  H  E  P  D   -   T H D :  

    Topic:  " Nature and properties of the doubly charmed exotic state Tcc+ in experiment and on a lattice. "  
    Speaker:   A.V. Nefediev (P.N. Lebedev Physical Institute of the Russian Academy of Sciences)  
    Place:  PNPI, Building 7. small conference hall
    Time:   April 25, 2024,   Seminar: 11:00

  • Contact persons:  
    Prof. M.G. Ryskin    (Phone: +7 (813 71) 46096   or  e-mail )
    Prof. V.T. Kim  (Phone: +7 (813 71) 46722   or  e-mail )
    Dr. M.B. Zhalov  (Phone: +7 (813 71) 46131   or  e-mail )

    HEPD Seminars in 2024 :

      April 25,   2024 year,   11:00
      Joint Seminar HEPD - TPD

    A.V. Nefediev

      (P.N. Lebedev Physical Institute of the Russian Academy of Sciences)

    Nature and properties of the doubly charmed exotic state Tcc+ in experiment and on a lattice.

      April 23 of 2024 year,   10:30

    Yu.G. Kudenko

      (INR of RAS, Moskow)

    Neutrino Physics: Modern Status, Anomalies, Perspectives.
      Abstract:
    Review of modern status of neutrino physics is presented in the talk.

      April 16 of 2024 year,   10:30

    А. L. Getalov

      (HEPD, PNPI)

    Bacterial nano-ferrihydrite.
      (Presentation)
      Video
      Abstract:
    Magnetic nanomaterials find the widest application. Current methods for chemical synthesis of nanoparticles are energy-intensive and use toxic chemicals, limiting biomedical applications. A promising new direction in this field is the use of biological objects for the production of inorganic nanoscale particles. Ferrihydrite nanoparticles (Fe2O3 * nH2O), synthesized by Klebsiella oxytoca bacteria during biomineralization of iron salt solutions from the culture medium, exhibit unique magnetic properties: they are characterized by antiferromagnetic order inherent in bulk ferrihydrite and spontaneous magnetic moment due to spin decompensation in nanoparticle sublattices. In the reviewed article, the authors from Krasnoyarsk investigated magnetic interparticle interactions and superparamagnetic blocking of powder systems of biogenic ferrihydrite nanoparticles using magnetometry and Mössbauer spectrometry. Two powder systems of nanoparticles were studied - biogenic ferrihydrite (average size 2.7 nm) and ferrihydrite, which underwent low-temperature annealing, as a result of which the average particle size (3.8 nm) increased and the organic shell burned out.

      April 11,   2024 year,   14:30
      Joint Seminar HEPD - TPD

    D.G. Levkov

      (INR RAS & ITMP MSU)

    Light bosonic Dark Matter and axion stars.
      Video
      Abstract:
    In the overview part of the talk I will discuss light bosonic (axion-like) Dark Matter. I will mention the models that predict the existence of light (pseudo)scalars, I will explain how such particles could have been produced in the early Universe and formed Dark Matter, and how they are searched experimentally. After this I will go into more detail about compact objects consisting of light Dark Matter - miniclusters and axion stars.

      April 2 of 2024 year,   10:30

    I. А. Alexandrov

      (SPbU)

    Schwinger's mechanism and vacuum photon emission.
      (Presentation)
      Video
      Abstract:
    In this talk, we will address the present status of theoretical and experimental investigations concerning the Schwinger mechanism of spontaneous electron-positron pair production from vacuum in strong electromagnetic backgrounds. This phenomenon is closely related to the vacuum emission of soft photons and also high-harmonic generation. We will discuss these effects and draw an explicit analogy between strong-field QED and atomic physics.

      March 26 of 2024 year,   10:30

    D.A.Ivanishchev

      (HEPD, PNPI)

    Trigger system of the MPD experiment at NICA collider.
      (Presentation)
      Video
      Abstract:
    The features of the trigger system of the MPD experiment at NICA collider are discussed in comparison with other experiments studying collisions of heavy relativistic nuclei. The results of a systematic study of capabilities of the trigger system of the MPD experiment in the collider mode to select events in collisions of light, intermediate masses and heavy nuclei at the energies of the NICA collider are presented.

      March 14,   2024 year,   14:30
      Joint Seminar HEPD - TPD

    M.G. Ryskin

      (PNPI)

    Oscillations in elastic high energy amplitude.
      (Presentation)
      Video
      Abstract:
    A weak (~ 1%) oscillations observed by TOTEM in elastic pp-scattering at 13 TeV correspond to the impact parameter b ~ 6-8 fm ! Theoretically the oscillations due to interference between the multi Pomeron exchange diagrams (analogous to the diffraction on black disk) were predicted in early 1970th however now the oscillations take place at |t| smaller than the first diffractive dip. IF this oscillations will be confirmed by ATLAS (?) this will be the qualitatively new phenomena.

      March 12 of 2024 year,   10:30

    S.V. Evdokimov

      (IHEP, Serpukhov)

    Investigation of Neutral States Created in Meson-Nucleus Interactions in Hyperon-M Experiment.
      Video

      March 05 of 2024 year,   10:30

    A.A. Dzyuba

      (HEPD, PNPI)

    Precision measurement of CP violation parameters in decays of B mesons at LHCb.
      (Presentation)
      Video
      Abstract:
    IIn the Standard Model of particle physics, CP invariance is violated in the quark sector. This effect is associated with a non-zero complex phase of the elements of the unitary quark mixing matrix. It is expected that manifestations of New Physics beyond the Standard Model are related to noticeable violations of CP symmetry. Therefore, one of the strategies for searching for such effects is based on precision measurements of mixing matrix elements (or their ratios) and testing of its unitarity. The LHCb experiment performs these studies by examining the characteristics of beauty mesons decays. The results of precision measurements of CP violation parameters φs and sin(2β) [1,2] will be discussed.
              References:
       1. Phys. Rev. Lett. 132 (2024) 021801
       2. Phys. Rev. Lett. 132 (2024) 051802

      February 29,   2024 year,   14:30
      Joint Seminar HEPD - TPD

    Igor Strakovsky

      (GWU)

    Search for Θ⁺ in К⁰p→K⁺n Reaction with JLab KLF.
      (Presentation)
      Video

      February 27 of 2024 year,   10:30

    I.A. Mitropolsky

      (ONI, PNPI)

    Compact neutron sources: DARIA vs NG.
      (Presentation)
      Video
      Abstract:
    In addition to S.V.Grigoriev's report, a brief review of compact neutron sources is provided. Attention is focused on the characteristics of neutron generators and their applications.

      February 22,   2024 year,   11:00
      Joint Seminar HEPD - TPD

    A.P. Serebrov

      (PNPI NRC KI)

    Sterile neutrinos, dark matter, Standard Model with right-handed neutrinos, neutrino mass hierarchy and CP violation.
      (Presentation)
      Video

      February 20 of 2024 year,   10:30

    A.E. Ezhilov

      (HEPD, PNPI)

    Precision measurement of Z boson transverse-momentum spectrum in proton-proton collision with 13 TeV in ATLAS experiment.
      Abstract:
    This talk describes precision measurements of the transverse-momentum distribution of lepton pairs using the 2015-2016 data of the pp collisions at 13 TeV collected with the ATLAS detector at LHC. The comparison with the different theoretical predictions are also presented.

      February 15,   2024 year,   14:30
      Joint Seminar HEPD - TPD

    Logashenko Ivan

      (on behalf of CMD-3 collaboration) BINP (Novosibirsk)

    Measurement of e+e-→π+π- cross section by CMD-3 and its implications to hadronic contribution to muon (g-2).
      (Presentation)
      Video

      February 13 of 2024 year,   10:30

    S.V. Grigoriev

      (PNPI NRC KI)

    DARIA compact neutron source project for research by neutron scattering methods
      (Presentation)
      Video
      Abstract:
    The world's leading neutron research centers are currently developing new generation neutron sources for research in the field of condensed matter physics. Compact neutron sources are designed to replace obsolete low- and medium-power reactors and open up opportunities for creating neutron scattering laboratories in scientific organizations and universities. Such a source initially yields neutron flux several orders of magnitude lower as compared to a large accelerator-type source; however, a significant part of these losses can be compensated by increasing the capture aperture and deep optimization of the instrument, including adapting the parameters of the accelerator, target and moderator to the needs of each specific installation using the source individually. We present a Russian initiative to create such a source - the DARIA project (compact neutron source Dedicated to Academic Research and Industrial Applications). The goal of the project is to develop and create first a prototype and then a network of compact neutron sources for the needs of neutron scattering.

      February 06 of 2024 year,   10:30

    N.P.Tkachenko

      (IHEP, Serpukhov)

    АTLAS & TOTEM: √s = 13 TeV. Results or half-finished products?
      (Presentation)
      Video
      Abstract:
    Detailed discussions of extracеed basic «forward» parameters ρ=ReT_N (s,t=0)/ImT_N (s,t=0), σ_tot= Im T_N (s,t=0), B={∂/∂t [dσ/dt]/[dσ/dt]}_(t=0) from the data, obtained by ТОТЕМ and ATLAS collaborations at √s=13 ТeV, in the Coulomb-nuclear interference region are presented.

      February 1,   2024,   14:30
      Joint Seminar HEPD - TPD

    M.M. Kirsanov

      (INR RAS)

    Recent results and plans of the NA64 experiment at the CERN SPS.
      Video
      Abstract:
    Thermal dark matter models with particle masses below the electroweak scale can provide an explanation for the observed relic dark matter density. This would imply the existence of a new feeble interaction between the dark and ordinary matter. The main purpose of the NA64 experiment is a search for sub-GeV dark matter production using the method of missing energy signature. The searches are performed at the H4 beam line at the CERN SPS. This line is mainly designed to provide 100 GeV electron beam. The analyzed statistics corresponds to $9.37\times10^{11}$ electrons on target (EOT) collected during 2016-2022 runs. The analysis of this statistics allowed us to probe for the first time the well motivated region of parameter space of benchmark thermal scalar and fermionic dark matter models. Additional statistics of about $6\times10^{11}$ was collected in the 2023 run. In addition to the main 100 GeV electron-beam measurement, NA64 is also developing a positron-beam program with several runs at different energies, to explore the ~ 100 MeV mediator mass range by exploiting LDM production via resonant $e^+e^-$ annihilation. This search is also supported by a dedicated ERC project, the "POsitron resonant annihilation intO dark mattER" (POKER) project, lead by INFN-Genova. An early test run already demonstrated the feasibility of the new technique, allowing to set competitive new limits in a limited mass region despite the much lower accumulated statistics.
        The variant of the NA64 detector for the searches of DM in the muon beam, called NA64mu, is also developed. It uses part of subdetectors of NA64e and a number of additional subdetectors. The purpose is to search for DM coupled only to second and third generations of leptons, suggested to explain the (g-2) anomaly and to improve sensitivity in the region of mediator masses above ~300 MeV. NA64 performed and plans also a number of other searches, such as the search for ALP coupled to gammas, search for X boson decaying to electrons, search of DM in the hadron beams, search for mu - tau conversion.

      January 30 of 2024 year,   10:30

    A.I. L'vov

      (P.N. Lebedev Physical Institute of RAN, Moscow)

    Compton Effect and Nucleon Polarizability.
      Video

      January 23 of 2024 year,   10:30

    S.I. Vorobyov

      (HEPD, PNPI NRC KI, Gatchina)

    μSR-investigations of materials with various types of putting in magnetic order at muon channel of synchrocyclotron SC-1000.
      (Presentation)

      January 18,   2024,   11:00
      Joint Seminar HEPD - TPD

    D.S. Gorbunov

      (INR RAS)

    Models with light particles of Dark Matter.
      Video
      Abstract:
    Traditionally, models of Dark Matter are divided according to the mechanism of particle creation into thermal and non-thermal. An example of the first is WIMPs. The second class is much richer. Using the simplest example of a scalar massive particle, we will discuss several mechanisms for the creation of Dark Matter particles. Then we'll look at some realistic models whose predictions are being tested in modern particle physics experiments.


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    Past HEPD Seminars in:   2023;    2022;    2021;    2020;    2019;    2018;    2017;    2016;    2015;    2014;    2013;    2012;    2011;    2010;    2009;    2008;    2007;    2006;    2005;    2004;    2003;   

HIGH ENERGY PHYSICS DIVISION                  ( Switch to russian version of HEPD Seminars HEPD Seminars - Russian version  )

Last update on:   by  Svetlana F. Udalova