THEME02-0-1085-2009/2010

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02-0-1085-2009/2010

Priority:

Status:

Approved for completion
in 2010

Study of the Nucleon and Baryon Structure at CERN
(COMPASS) and DESY (HERMES, H1)

Leader:	A.P. Nagaytsev
Scientific leader:	I.A. Savin

Participating Countries, Institutes and International organizations:
Armenia, Belarus, Belgium, Bulgaria, Canada, CERN, Czech Republic, France, Germany, Israel, Italy, Japan, Netherlands, Poland, Russia, Switzerland, United Kingdom, USA.

Determination of the quark spin, gluon and quark orbital momenta contributions to the nucleon spin.
Study of spin-dependent structure functions of the proton and neutron, including transversity, and its kinematical variables dependences.
Sum rule tests for spin-dependent structure functions of the proton and neutron, QCD tests.
Pion and kaon polarizabilities measurements
Search of new bound states of qluons and quarks
Search for effects of nucleon strange sea and gluon polarization in the production of hyperons and vector mesons
Construction of a hadron calorimeter, a muon system and straw tracking chambers for the COMPASS spectrometer.
COMPASS software development and support of the CERN program library at JINR.
Study of inclusive, exclusive and semi-inclusive processes in deep inelastic scattering of muons and electrons on polarized and unpolarized targets.
Project preparation on measurements of Generalized Parton Distributions and transverse hadron structure in Drell-Yan processes.

Expected main results in 2010:

Participation in data taking in COMPASS spectrometer at CERN.
Support of HCAL1 during 2010 run.
Support of MW1 during 2010 run.
Performance studies of the tracking detectors MWPC, STRAW, W4/5 for COMPASS.
Project preparation on measurements of Generalized Parton Distributions and transverse hadron structure in Drell-Yan processes.
Software development and simulation of the various reactions, studying in COMPASS. Analyzing of the COMPASS data at JINR and publications preparation. Finalizing of the studying of effects of nucleon strange sea and gluon polarization in the production of hyperons.
Theoretical studies of spin effects in COMPASS.
Measurement of the diffractive inclusive cross section of photo-production and get photo-production hadrons with high transverse momentum.

List of projects:
	Project	Leader	Priority (period of realisation)
1.	COMPASS	A.P. Nagajtsev I.A. Savin	1 (1998-2010)

List of Activities

Activity or experiment

Leader

Status

Laboratory

Responsible
person

Leading researchers
and number of participants

COMPASS

A.P. Nagaytsev

Data taking
Data analysis
Project preparation

Hadron calorimeter

I.A. Savin
O.P. Gavrishchuk

Maintenance

VBLHEP

O.P. Gavrishchuk
G.V. Meshcheryakov
G.A. Yarygin

Muon system

G.D. Alekseev

Maintenance

DLNP

G.D. Alekseev + 5 pers.

Tracking systems

V.D. Peshekhonov
G.D. Alexeev

Maintenance

VBLHEP

V.D. Peshekhonov + 5 pers.
V.A. Anosov + 1 pers.

DLNP

V.V.Chalyshev + 3 pers.
G.D. Alexeev + 5 pers.
A.A. Popov

Software development.
Data analysis

A.Yu. Korzenev

Realization

VBLHEP

I.A. Savin
V.Yu. Alexain
A.M. Kotsinyan
D.V.Peshekhonov
G.I.Smirnov
A.P. Nagaytsev
O.M. Kuznetsov
N.N. Vlasov
Yu.I. Ivanshin
A.Yu. Korzenev
M.G. Sapozhnikov
N.S. Rossijskaya
E.V. Zemlyanichkina
V.L. Rapatsky
A.A. Antonov
A.L. Gibinski

DLNP

A.G. Olshevsky
A.V. Guskov
Z.V. Krumshtein

LIT

A.M. Raportirenko
V.P. Gerdt
D.A. Yanovich

Project preparation on measurement of generalized
parton distributions and
transverse spin structure
in Drell-Yan processes. Development of new electro-magnetic
calorimeter

A.P. Nagaytsev
I.A. Savin

Project preparation

VBLHEP

I.A. Savin
O.P. Gavrishchuk
G.A. Yarygin
G.V. Meshcheryakov
N.N. Vlasov
O.M. Kuznetsov
A.L. Gibinski

DLNP

A.G. Olshevskiy + 5 pers.
A.V. Guskov
Z.V. Krumshtein
O.Yu. Shevchenko
O.N. Ivanov

LIT

P.V. Zrelov + 2 pers.

BLTP

A.V. Efremov
O.V. Teryaev

Preparation of the project
on measurement of proton form-factor ratios at 13-15 GeV/c

A.P. Nagaytsev
I.A. Savin
N.M. Piskunov

Project preparation

VBLHEP

O.P. Gavrishchuk
G.A. Yarygin
G.V. Meshcheryakov

II.

HERMES

V.G. Krivokhijine

Data analysis

VBLHEP

A.P. Nagaytsev
G.V. Meshcheryakov
G.A. Yarygin

DLNP

O.N.Ivanov
O.Yu. Shevchenko

III.

M.N. Kapishin

Data analysis

VBLHEP

M.N. Kapishin + 4 pers.

IV.

Theoretical studies

A.V. Efremov

Realization

BLTP

S.B. Gerasimov
A.V. Kotikov
A.E. Dorokhov
N.I. Kochelev

BLTP

S.B. Gerasimov
O.V. Teryaev
A.V. Kotikov
A.E. Dorokhov
N.I. Kochelev
A.M. Sidorov

Collaboration
Country or international organization	City	Institute or Laboratory
Armenia	Yerevan	YerPhI
Belarus	Minsk	NC PHEP BSU
Belgium	Mons	UMH
	Brussels	ULB
Bulgaria	Sofia	INRNE BAS
		SU
Canada	Vancouver	TRIUMF
	Edmonton	U of A
CERN	Geneva
Czech Republic	Prague	CTU
France	Saclay	IRFU
Germany	Bielefeld	Univ.
	Bochum	RUB
	Bonn	UniBonn
	Freiburg	Univ.
	Hamburg	DESY
	Heidelberg	MPI-K
	Munich	LMU
		TUM
	Mainz	JGU
	Erlangen	Univ.
Israel	Tel Aviv	TAU
Italy	Turin	INFN
	Trieste	INFN
	Frascati	INFN LNF
Japan	Chiba	Toho Univ.
	Nagoya	Nagoya Univ.
	Osaka	OCU
	Sendai	Tohoku Univ.
	Tsukuba	KEK
	Yamagata	Yamagata Univ.
Netherlands	Amsterdam	NIKHEF
Poland	Warsaw	WUT
Russia	Moscow	SINP MSU
		LPI RAS
	Protvino	IHEP
	Gatchina	PNPI RAS
	Troitsk	INR RAS
Switzerland	Zurich	UZH
United Kingdom	Liverpool	Univ.
USA	Argonne, IL	ANL
	Cambridge, MA	MIT
	Boulder, WY	CU
	Pasadena, CA	CALTECH

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Study of the Nucleon and Baryon Structure at CERN (COMPASS) and DESY (HERMES, H1)

Study of the Nucleon and Baryon Structure at CERN
(COMPASS) and DESY (HERMES, H1)