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Studies
of the Nucleon and Hadron Structure at CERN
Theme
leader:
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A.V. Guskov
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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 vuon pair production (Drell-Yan,
J/Psi).
Spin
effects in hadron interactions at 0.3-3.0~GeV.
Study
of the mechanisms of exclusive production of photons, pions
and ρρ-mesons
in DIS and DVCS processes.
Measurement
of the Primakoff reactions cross sections.
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
results in the current year:
Measurement
of π0 production
in the processes of exclusive deep inelastic scattering of muons on
a hydrogen target.
Measurements
of Collins and Sivers asymmetry on hydrogen and deuterium targets.
Measurement
of semi-inclusive scattering on hydrogen and deuterium targets with
2 gadrons production.
Measurement
of transverse spin asymmetries in semi-exclusive scattering
processes.
Software
development and modeling of vaious reactions studied on the
COMPASS-II spectrometer. Analysis
of data in JINR and preparation of publications.
Theoretical
studies on the program COMPASS-I and COMPASS-II.
Extraction
of spin asymmetries from the 2022 run data of Semi-Inclusive
Deep-Inelastic Scattering (SIDIS) of muons off transversely
polarized 6LiD
target.
List
of projects
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Project
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Leader
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Priority
(period
of realisation)
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1.
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COMPASS-II
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A.V.
Guskov
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1
(2011-2023)
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List
of Activities
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Activity
or Experiment
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Leaders
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Status
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Laboratory
or other
Division of JINR
Responsible
person
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Main
researchers
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I.
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Experiment
COMPASS-II
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A.V.
Guskov
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Data
taking
Data analysis
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1.
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Hadron
calorimeter
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O.P.
Gavrishchuk
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VBLHEP
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V.A.
Anosov
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DLNP
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A.V.
Rybnikov, A.S. Selyunin,
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2.
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Electromagnetic
calorimeter
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N.V.
Anfimov
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VBLHEP
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V.A.
Anosov, O.P. Gavrishchuk
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DLNP
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A.I.
Antoshkin, V.N. Frolov, A.V. Guskov, V.M. Kudryavtsev,
A.G.
Olshevskiy, A.V. Rybnikov, A.S. Selyunin,
I.E. Tchirikov-Zorin
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3.
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Muon
system
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G.D.
Alekseev
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DLNP
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V.M.
Abazov, G.A. Golovanov, A.A. Piskun, A.G. Samartsev,
V.V.
Tokmenin, L.S. Vertogradov, N.I. Zhuravlev
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4.
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System
of the data taking
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V.N.
Frolov
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5.
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Software
devlopment.
Data
analysis
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E.V.
Zemlyanichkina
A.V. Guskov
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VBLHEP
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R.R.
Akhunzyanov, R. Gushcherski, A.V. Ivanov, Yu.I. Ivanshin,
O.M.
Kuznetsov, D.V. Peshekhonov, N.S. Rogacheva,
I.A. Savin,
E.A. Salmina
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DLNP
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N.V.
Anfimov, A.I. Antoshkin, I.I. Denisenko, A.O. Gridin,
A.
Maltsev, A.G. Olshevskiy, A.V. Rybnikov, A.S. Selyunin
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MLIT
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A.Sh.
Petrosyan, P.V. Zrelov
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6.
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Measurements
of generalized parton distributions
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A.V.
Guskov
I.A. Savin
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VBLHEP
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R.R.
Akhunzyanov, R.R.
Guscherski, O.M. Kuznetsov,
V.D. Peshekhonov, N.S.
Rogacheva, E.A. Salmina, O.V. Teryaev,
E.V. Zemlyanichkina
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DLNP
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I.I.
Denisenko, A. Maltsev, A.G. Olshevskiy
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BLTP
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O.V.
Teryaev
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7.
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Studies
of Drell-Yan processes
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A.V.
Guskov
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DLNP
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I.I.
Denisenko, A.O. Gridin, A. Maltsev
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8.
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Spin
effects in hadron interactions
at 0.3-3.0 GeV
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A.V.
Kulikov
D.A Tsirkov
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DLNP
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T.I.
Azaryan, S.N. Dymov, V.I. Komarov, V.S. Kurbatov,
Zh.
Kurmanaliev, A. Kunsafina, V.V. Shmakov, Yu.N. Uzikov,
B.Zh.
Zalikhanov
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9.
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Studies
of semi-inclusive reactions
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I.A.
Savin
E.V. Zemlyanichkina
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VBLHEP
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S.R.
Gevorgyan, A.V. Ivanov, Yu.I. Ivanshin, N.S. Rogacheva,
E.A.
Salmina
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II.
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Theoretical
studies
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O.V.
Teryaev
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BLTP
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S.B.
Gerasimov, A.V. Kotikov, A.M. Sidorov
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III.
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Exploring
fundamental properties
of hadrons at AMBER experiment
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A.V.
Guskov
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DLNP
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G.D.
Alexeev, I.I. Denisenko, V.N. Frolov, A. Gongadze,
M.I.
Gostkin, A.O. Gridin, N.A. Kovyazina, V.G. Kruchonok,
A.
Maltsev
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BLTP
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A.B. Arbuzov,
S.G. Bondarenko, V.V. Byt'yev
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VBLHEP
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V.A.
Anosov, O.P. Gavrishchuk, R.I. Gushterski, A.Yu. Korzenev, O.M.
Kouznetsov, I.A. Savin, E.V. Zemlyanichkina
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Collaboration
Country
or International Organization
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City
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Institute
or Laboratory
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CERN
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Geneva
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CERN
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Czech
Republic
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Brno
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BUT
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Liberec
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TUL
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Prague
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CU
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France
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Saclay
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SPhN
CEA DAPNIA
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Germany
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Bochum
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RUB
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Bonn
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UniBonn
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Freiberg
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TUBAF
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Mainz
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JGU
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Munich
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TUM
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India
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Kolkata
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MIERE
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Israel
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Tel
Aviv
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TAU
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Italy
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Trieste
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INFN
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Turin
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INFN
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Japan
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Yamagata
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Yamagata
Univ.
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Poland
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Otwock
(Swierk)
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NCBJ
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Warsaw
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WUT
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Portugal
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Aveiro
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UA
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Lisbon
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LIP
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Russia
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Moscow
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LPI
RAS
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Protvino
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IHEP
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Tomsk
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TPU
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Taiwan
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Taipei
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AS
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USA
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Urbana,
IL
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I
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