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Theoretical Physics
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Elementary Particle Physics
02-2-1123-2015/2022
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02-1-1096-2010/2022
02-0-1083-2009/2022
02-0-1085-2009/2022
    02-0-1085 - RUS
02-1-1086-2009/2023
02-0-1065-2007/2023
02-0-1127-2016/2023
02-1-1097-2010/2023
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02-1-1088-2009/2022
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Nuclear Physics
03-0-1129-2017/2023
03-5-1130-2017/2023
03-2-1100-2010/2024
03-4-1128-2017/2022
Condensed Matter Physics
04-4-1142-2021/2025
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04-4-1143-2021/2025
04-4-1133-2018/2023
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Networking, Computing
05-6-1118-2014/2023
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Educational Programme
06-0-1139-2019/2023

02-0-1085-2009/2022

 

Priority:

1

 

 

Status:

Being concluded



Studies of the Nucleon and Hadron Structure at CERN


Leaders:

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 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.


List of projects:


 

Project

Leader

Priority
(period of realisation)

1.

COMPASS-II

A.P. Nagajtsev

1   (2011-2022)


List of Activities:


 

Activity or Experiment

Leaders

Status

 

    Laboratory or other
    Division of JINR
Responsible person

Main researchers

I.

Experiment COMPASS-II

A.P. Nagaytsev

Data taking
Data
processing



1.

Hadron calorimeter

O.P. Gavrishchuk

Maintenance


 

VBLHEP

V.A. Anosov


 

DLNP

A.S. Selyunin, A.V. Rybnikov


2.

Electromagnetic calorimeter

A.P. Nagaytsev
N.V. Anfimov

Maintenance


 

VBLHEP

V.A. Anosov, O.P. Gavrishchuk


 

DLNP

A.I. Antoshkin, A.V.Guskov, V.M. Kudryavtsev, A.G. Olshevskiy, A.V. Rybnikov, A.S. Selyunin, I.E. Tchirikov-Zorin, V.N.Frolov


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.

System of the data taking

V.N. Frolov

Maintenance


 




5.

Software devlopment.
Data analysis

E.V. Zemlyanichkina
A.V. Guskov

Realization


 

VBLHEP

R.R. Akhunzyanov, R. Gushcherski, A.V. Ivanov, Yu.I. Ivanshin, O.M. Kuznetsov, A.P. Nagaytsev, N.S. Rogacheva,
D.V. Peshekhonov, I.A. Savin, E.A. Salmina


 

DLNP

N.V. Anfimov, A.I. Antoshkin, I.I. Denisenko, A.O. Gridin,
A. Maltsev, A.G. Olshevskiy, A.V. Rybnikov, A. Rymbekova,
A.S. Selyunin


 

MLIT

A.Sh. Petrosyan, P.V. Zrelov


6.

Measurements of generalized
parton distributions

A.P. Nagaytsev
A.V. Guskov
I.A. Savin

Realization


 

VBLHEP

R.R. Akhunzyanov, R. Guscherski, O.M. Kuznetsov,

V.D. Peshekhonov, N.S. Rogacheva, E.A. Salmina, O.V. Teryaev, E.V. Zemlyanichkina


 

DLNP

I.I. Denisenko, A. Maltsev, A.G. Olshevskiy, A. Rymbekova


 

BLTP

O.V. Teryaev


7.

Studies of Drell-Yan processes

A.V. Guskov

Realization


 

DLNP

I.I. Denisenko, A.O. Gridin, A. Maltsev, E.O. Mitrofanov,
A. Rymbekova


8.

Spin effects in hadron
interactions at 0.3-3.0 GeV

A.V. Kulikov
D.A Tsirkov

Data processing



 

DLNP

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


9.

Studies of semi-inclusive
reactions

I.A. Savin
E.V. Zemlyanichkina

Realization



 

VBLHEP

S.R. Gevorgyan, A.V. Ivanov, Yu.I. Ivanshin, N.S. Rogacheva,
E.A. Salmina


II.

Theoretical studies

O.V. Teryaev

Realization


 

BLTP

S.B. Gerasimov, A.V. Kotikov, A.M. Sidorov



Collaboration

Country or International Organization

City

Institute or laboratory

CERN

Geneva

CERN

Czech Republic

Brno

BUT

 

Liberec

TUL

 

Prague

CU

France

Saclay

SPhN CEA DAPNIA

Germany

Bochum

RUB

 

Bonn

UniBonn

 

Freiberg

TUBAF

 

Mainz

JGU

 

Munich

TUM

India

Kolkata

MIERE

Israel

Tel Aviv

TAU

Italy

Trieste

INFN

 

Turin

INFN

Japan

Yamagata

Yamagata Univ.

Poland

Otwock (Swierk)

NCBJ

 

Warsaw

WUT

Portugal

Aveiro

UA

 

Lisbon

LIP

Russia

Moscow

LPI RAS

 

Protvino

IHEP

 

Tomsk

TPU

Taiwan

Taipei

AS

USA

Urbana, IL

I