THEME02-0-0941-91/2009

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02-0-0941-91/2009

Priority:

Status:

Extended

Search for Non-Nucleon Degrees of Freedom and Spin Effects
in Few-Nucleon Systems

Leader:

N.M. Piskunov
G. Martinska

Scientific Programme:
Study of charge-exchange processes in dp interactions (STRELA). Study of polarization characteristics of different reactions with polarized and nonpolarized deuterons and nucleons in inclusive, exclusive and correlation experiments (DELTA-SIGMA). Measurement ofanalyzing powers for the reaction p + CH2 at polarized proton momentum 3-6 GeV/c (ALPOM).
Study of highly excited nuclear matter and collectivity effects in nuclear medium; delta and other nucleonic resonance excitations on protons and nuclei.
Modernization of the polarized proton target to study polarization characteristics of NN and dN interactions. Detector development for relativistic nuclei and polarization experiments at the Nuclotron (DELTA-SIGMA), CEBAF (Hall C), COSY.
First measurements of complete set of the np spin observables at 0 ^o -

L(np),

T(np), A_00kk(np), A_00nn(np) and R_dp (the total np cross section differences and spin-correlation parameters), using longitudinal (L) and transverse (T) polarized and unpolarized targets as well as quasimonochromatic relativistic 1-6 GeV neutron beams. Data on energy dependences of these observables allow to determine the forward scattering NN amplitudes, for the first time over this energy region. Comparison of the obtained data with QCD motivated calculations.
The study properties of strongly interacting matter utilizing polarization phenomena in hadron-nucleon and lepton-nucleon interactions, and in the decay of atomic nuclei. Experiments will per-formed using high intensity polarized and unpolarized hadron and lepton beams and polarized and unpolarized solid state targets and high intensity radioactive ion beams.

Expected main results in 2007:

Data taking with the STRELA set-up at the extracted Nuclotron beam.
Data taking with the DELTA-SIGMA set-up using the polarized and unpolarized neutron beams at the Nuclotron. Analysis of accumulated during the runs statistics.
Development of theoretical methods to calculate deuteron nuclei fragmentation taking into account relativistic and FSI effects.
Measurement of the analyzing power in pC, pCH₂ and pCH₄ scattering. Measurement of polarization transfer from d to p in the reaction ¹²C (, )X at internal momenta 0.6-0.8 GeV/c.
Preparation of the detectors and testing of them on the ejection beams.
The study of hadron structure and hadron spectroscopy will be performed using Nuclotron/MPT, SPS/COMPASS and RHIC/PHENIX facilities and the study of nuclear structure and nuclear spectroscopy will be performed using ISOL facility.

List of projects:
	Project	Leader	Priority (period of realisation)
1.	STRELA	V.V. Glagolev N.M. Piskunov	1 (2000-2009)
2.	DELTA-SIGMA	L.N. Strunov V.I. Sharov	1 (2001-2009)
3.	MPT	E.A. Matyushevsky N.S. Borisov	1 (2001-2007)
4.	ALPOM	N.M. Piskunov E. Tomasi-Gustafsson	2 (2001-2008)

List of Activities

Activity or Experiment

Leader

Status

STRELA

V.V. Glagolev
N.M. Piskunov

Data taking

DELTA-SIGMA

L.N. Strunov
V.I. Sharov

Data taking

ALPOM

N.M. Piskunov
E. Tomasi-Gustafsson
C. Pedrisat

Preparation
Data taking

Modernization of the polarized proton target

E.A. Matyushevsky
N.S. Borisov

Upgrade

Theoretical calculations of polarized processes

V.V. Burov
V.K. Lukyanov

Data analysis

Detector development for WASA/COSY

A.A. Povtoreyko

Preparation
Data taking

Spin effects in hadron-nucleon and lepton-nucleon interactions

M. Finger

Data analysis

Collaboration
Country or international organization	City	Institute or Laboratory
Belarus	Minsk	INP BSU
Bulgaria	Sofia	INRNE BAS
		UCTM
CERN	Geneva
Czech Republic	Prague	CU
		CTU
	Rez	NPI ASCR
France	Saclay	SPhN CEA DAPNIA
Georgia	Tbilisi	IHEPI TSU
Germany	Dresden	TUD
	Julich	FZJ
Italy	Trieste	INFN
Japan	Hiroshima	Hiroshima Univ.
	Osaka	RCNP
JINR	Dubna	LIT
		BLTP
		DLNP
		LPP
Poland	Lodz	FPCh UL
	Otwock-Swierk	SINS
Russia	Gatchina	PNPI RAS
	Moscow	LPI RAS
		RRC KI
	Troitsk	INR RAS
Slovak Republic	Kosice	IEP SAS
		UPJS
Sweden	Uppsala	UU
Switzerland	Geneva	UniGe
	Villigen	PSI
Ukraine	Kharkov	KFTI NASU
	Kiev	BITP NASU
USA	Upton, NY	BNL
	Newport News, VA	JLab
	Norfol, VA	NSU
	Williamsburg, VA	WM
Uzbekistan	Tashkent	INP UAS
		Assoc."P.-S." PTI

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Search for Non-Nucleon Degrees of Freedom and Spin Effects in Few-Nucleon Systems

Search for Non-Nucleon Degrees of Freedom and Spin Effects
in Few-Nucleon Systems