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02-0-1085-2009/2019
Priority:1
Status: Being concluded

Studies of the Nucleon and Hadron Structure at CERN


Leader:     A.P. Nagaytsev
Deputy:     A.V. Guskov

Participating countries and international organizations:
CERN, Czech Republic, France, Germany, India, Israel, Italy, Japan, Poland, Portugal, Russia, Taiwan, USA.

Issues addressed and main goals of research:
Studies of the generalized parton distributions in various exclusive processes. Study of the mechanisms of exclusive production of photons, pions and vector mesons in the processes of deep inelastic scattering of muons on nuclei (DIS) and in processes of deep inelastic virtual Compton scattering (DVCS).
Measurements of the polarizability of a pion. Study of the structure of nucleons in Drell-Yan processes. Study of inclusive and semi-inclusive processes in DIS reactions of muons and hadrons on polarized targets.
  • Measurements of the structure functions of a nucleon, polarized parton distributions of nucleons.

  • Measurements of the structure of nucleons in the Drell-Yan processes.

  • Spin effects in hadron interactions at 0.3-3.0 GeV.

  • Study of the mechanisms of exclusive production of photons, pions and -mesons in DIS and DVCS processes.

  • Measurement of the polarizability of the pion.

  • Creation and development of a set of programs for modeling and data processing. System support for CERN software.

  • Preparation of detectors for the COMPASS-II spectrometer.
Expected major results in the current year:
  • Results on azimuthal asymmetries with a longitudinally polarized deuterium target.

  • Preliminary results on the polarization of the pion from the 2012 data.

  • Results on kaon multiplicities.

  • Observation of the exclusive production of the X(3872) in the reactions muons with nuclear targets.

  • Software development and modeling of vaious reactions studied on the COMPASS-II spectrometer. Ana-lysis of data in JINR and preparation of publications.

  • Theoretical studies on the program COMPASS-I and COMPASS-II.
List of projects:
  Project Leader Priority
(period of realisation)
1. COMPASS-II A.P. Nagajtsev 1   (2011-2020)

List of Activities
  Activity or Experiment Leaders
Status
  Laboratory or other
Division of JINR
Responsible person
Main researchers
I. Experiment COMPASS A.P. Nagaytsev
Data taking
Data analysis
1. Hadron calorimeter I.A. Savin
O.P. Gavrishchuk
Maintenance
  VBLHEP V.A. Anosov, G.V. Meshcheryakov, A.S. Yukaev
  DLNP A.S. Selyunin
2. Electromagnetic calorimeter A.P. Nagaytsev,
N.V. Anfimov
Maintenance
  VBLHEP V.A. Anosov, V.I. Astakhov, O.P. Gavrishchuk, G.V. Meshcheryakov, A.P. Nagaytsev
  DLNP A.I. Antoshkin, V.O. Gromov, D.V. Fedossev, V.M. Kudryavtsev, M.V. Nikitin, A.G. Olshevskiy, T.V. Rezinko, A.V. Rybnikov, A.S. Selyunin, I.E. Tchirikov-Zorin
3. Muon system G.D. Alekseev
Maintenance
  DLNP V.M. Abazov, G.A. Golovanov, A.A. Piskun, A.G. Samartsev, V.V. Tokmenin, L.S. Vertogradov, N.I. Zhuravlev
4. Polarized target Yu.F. Kiselev
Maintenance
  VBLHEP Yu.F. Kiselev
5. System of the data taking V.N. Frolov
Maintenance
  DLNP V.N. Frolov
6. Software devlopment.
Data analysis
E.V. Zemlyanichkina
A.V. Guskov
Realization
  VBLHEP R.R. Akhunzyanov, R. Gushcherski, A.V. Ivanov, Yu.I. Ivanshin, V.S. Batozskaya, O.M. Kuznetsov, G.V. Meshcheryakov, A.P. Nagaytsev, N.S. Rogacheva,
D.V. Peshekhonov, I.A. Savin, G.I. Smirnov, E.A. Salmina
  DLNP N.V. Anfimov, A.I. Antoshkin, A.F. Gridin, I.A. Denisenko, A.V. Maltsev, A.G. Olshevskiy, T.V. Rezinko, A.V. Rybnikov, A.A. Rymbekova, A.S. Selyunin
  LIT P.V. Zrelov, A.Sh. Petrosyan
7. Measurements of generalized
parton distributions
A.P. Nagaytsev
A.V. Guskov
I.A. Savin
Realization
  VBLHEP R.R. Akhuzyanov, V.S. Batozskaya, R. Guscherski, G.V Meshcheryakov, O.M. Kuznetsov, N.S. Rogacheva, V.D. Peshekhonov, E.A. Salmina, G.I. Smirnov, O.V. Teryaev, E.V. Zemlyanichkina
  DLNP I.A. Denisenko, A.V. Maltsev, A.G. Olshevskiy, A.A. Rymbekova
  BLTP A.V. Efremov
8. Studies of Drell-Yan processes A.V. Guskov
Realization
  DLNP A.V. Guskov, A.O. Gridin, I.A. Denisenko, A.V. Maltsev, A.A. Rymbekova, E.O. Mitrofanov
9. Spin effects in hadron interac-
tions at 0.3-3.0 GeV
A.V. Kulikov
D.A Tsirkov
Data processing
  DLNP T.I. Azaryan, S.N. Dymov, B.Zh. Zalikhanov, V.I. Komarov, V.S. Kurbatov, Zh. Kurmanaliev, A. Kunsafina, Yu.N. Uzikov, V.V. Shmakov
10. Studies of semi-inclusive
reactions
I.A. Savin
E.V. Zemlyanichkina
Realization
  VBLHEP Yu.I. Ivanshin, N.O. Mitrofanov, N.S. Rogacheva, E.A. Salmina
II. Theoretical studies A.V. Efremov
Realization
  BLTP S.B. Gerasimov, A.E. Dorokhov, O.V. Teryaev, A.V. Kotikov, A.M. Sidorov

Collaboration
Country or International
Organization
City Institute or Laboratory
CERN Geneva CERN
Czech Republic Prague CU
Brno BUT
Liberec TUL
France Saclay SPhN CEA DAPNIA
Germany Bielefeld Univ.
Bochum RUB
Bonn UniBonn
Freiburg TUBA
Hamburg DESY
Julich FZJ
Munich TUM
Mainz JGU
Israel Tel Aviv TAU
Italy Turin INFN
Trieste INFN
India Kolkata MIERE
Japan Yamagata Yamagata Univ.
Poland Warsaw WUT
Otwock-Swierk NCBJ
Portugal Aveiro UA
Lisbon LIP
Russia Moscow LPI RAS
Tomsk TPU
Protvino IHEP
Taiwan Taipei AS
USA Urbana, IL I

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