THEME03-1-1033-2000/2005

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03-1-1033-2000/2005

Priority:

Status:

Extended

Experiments "Leading Particles"
(Scintillation Magnetic Spectrometer MSU) and SPIN

Leader:

L.I. Sarycheva
A.I. Malakhov
M. Finger

Scientific Programme:
An investigation of leading particles from proton-nucleus interactions at the experimental apparatus SMS MSU ("Scintillation magnetic spectrometer of Moscow State University") is used to illuminate the mechanism of strong interactions, and the spin role in it is proposed. In the framework of the programme of the investigation of interactions of polarized protons with nuclei, it is proposed to perform an experimental investigation of single-spin asymmetries of polarized proton scattering on intranuclear nucleons to be compared with analogous characteristics for scattering on free nucleons in the region of energies 1-4 GeV. In particular, the analyzing power is measured for p

+ A

p_L + p(n)_R + X and d

+ A

p_L + p(n)_R + X reactions. It permits one to study the spin nuclear structure, anomalous spin phenomena in strong interactions, and importance for the development of nuclear polarimetry. In the framework of an additional direction (for Nuclotron beams only), further research with the apparatus SMS MSU will be focussed on the problem of difference in the production mechanism for leading

-mesons and protons.
Study of spin effects in elastic and inelastic np scattering and in the decay of atomic nuclei (SPIN).

Expected main results in 2003:

Measurement of the analyzing power A(,u) of proton-carbon scattering in the reactions p + C ¹² p_L + p + X and p + H(CH₂) p_L + p + X at T_p=2.51 and 3.60 GeV and model-theoretical analysis of the obtained data.
Development of the scattering experiment of polarized protons (deuterons) on different nuclei for polarized beams of the Nuclotron.
Obtaining the analyzing power for the reaction np pp ^- and for elastic scattering np np for 270-570 MeV.

List of Activities

Activity or project

Spokespersons

Status

SMS MSU

A.A. Yershov

Data taking

SPIN

M. Finger

Data analysis

Collaboration
Country or international organization	City	Institute or Laboratory
Czech Republic	Brno	ISI ASCR
	Liberec	TUL
	Prague	CU
		CTU
	Rez	NRI
		NPI ASCR
Germany	Freiburg	ALUF
JINR	Dubna	VBLHE
Russia	Moscow	SINP MSU
Switzerland	Villigen	PSI

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Experiments "Leading Particles" (Scintillation Magnetic Spectrometer MSU) and SPIN

Leader:

Experiments "Leading Particles"
(Scintillation Magnetic Spectrometer MSU) and SPIN