THEME02-1-1086-2009/2014

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02-1-1086-2009/2014

Priority:

Status:

Approved for completion
in 2014

Strangeness in Hadronic Matter and Study of Inelastic Reactions Near Kinematical Borders

Leaders:

E.A. Strokovsky
E.S. Kokoulina

Participating Countries, Institutes and International Organizations:
Belarus, Czech Republic, Germany, Japan, Russia, Ukraine.

Scientific Programme:
Strangeness in hadronic matter and study of boundary effects:
search of effects of hidden intrinsic polarized sea of strange quarks in nucleon;
study of stabilizing effects of strangeness in nuclear matter and properties of the lightest hypernuclei;
search for exotic baryons with positive strangeness;
study of multi-particle dynamics in inelastic proton-proton and proton-nucleus interactions with extremally high multiplicity.

Expected results:

Data on production cross sections for hyper-fragments of relativistic nuclei. Data on the lifetimes and binding energies of the lightest hypernuclei ⁴H, ³H, ⁶H; search for ⁶H. Study of the decay channels, including non--mesonic decays of the ¹⁰Be and ¹⁰B hypernuclei.
New experimental data on total and differential cross sections of and production in pp and np interactions at threshold. Study of mechanisms of the vector meson production in NN interaction at threshold. Data on the OZI-rule violation; its energy dependence and dependence on isospin of the NN system in the initial state at nucleon energies near the and production thresholds.
Renewal of the electromagnetic calorimeter, upgrade of the magnetic spectrometer; upgrade of the data acquisition system; optimizing of the multiplicity trigger. Software development for reconstruction of high multiplicity events at drift tube tracker and magnetic spectrometer.
Search and study of production of exotic baryons with positive strangeness ("pentaquarks") in pp and np interactions.
Construction of the wide acceptance magnetic spectrometer NIS-GIBS with multi-tracking capability and time-of-flight particle identification system at the Nuclotron extracted beam.
Measurements of the partial cross sections of pA interactions at multiplicity above 20. Measuremenets of proton spectra and multiplicity. Study of multiparticle correlations, search for "ring-like" events (gluonic Cherenkov radiation). Study of multiplicity fluctuations in pA interactions for Bose-Einstein condensation search. Development of analytic and Monte-Carlo models for description of high multiplicity processes where non-perturbative evolution of quark-gluon matter and phase transitions are taken into account.
Creation and test of electromagnetic calorimeter for soft photons (E<50 MeV) detection. Measurements of the soft photon yields in dependence upon charged and neutral particle multiplicities.

Expected main results in 2014:

Modernization of the DAQ and tracking systems of the NIS-GIBS spectrometer.
Study of the setup characteristics at the extracted deuteron and ⁷ beams. Spectrometer calibrating by binary reactions and first physical results obtaining.
Data taking with the NIS-GIBS spectrometer at the extracted deuteron and ⁷ beams within the hyper-nuclear program.
Analysis of data from LEPS spectormeter on vector-meson photoproduction by polarized photons.
Upgrade of the SVD-2 setup:
a) upgrade of the electronics of the spectrometer and modernizing of the data analysis software for the drift tracker;
b) renewal of the of the electromagnetic calorimeter;
c) production of electromagnetic calorimeter for soft photon registration.
Reconstruction of momentum spectra of the particles produced in pp interactions with multiplicity up to 30. Monte-Carlo simulation of the soft photon calorimeter operation.
Development of the analytic models for multiple particle production and estimation of the soft photon yields.

List of projects:
	Project	Leader	Priority (period of realisation)
1.	HyperNIS	E.A. Strokovsky	1 (2010-2015)

List of Activities

Activity or Experiment

Leaders

Status

Laboratory or other
Division of JINR
Responsible person

Main researchers

Experiment NIS

E.A. Strokovsky

Realization
Data taking

VBLHEP

R.A. Salmin, M.G. Sapozhnikov, V.P. Balandin, S.N. Bazylev, P.A. Rukoyatkin, A.A. Feschenko, S.N. Plyashkevich, J. Lukstins, Yu.T. Borzunov, V.D. Aksinenko, A.I. Maksimchuk, V.B. Chumakov, V.Yu. Ivanenko, O.V. Okhrimenko, A.I. Golokhvastov, S.A. Avramenko, M.H. Anikina, A.V. Averiyanov, A.M. Korotkova, N.G. Parfenova, S.V. Starikova, V.B. Dunin + 2 stud., A.V. Konstantinov

DLNP

A.N. Shalyugin, V. Tereschenko

Experiment GIBS

J. Lukstins

Realization
Data taking

VBLHEP

V.D. Aksinenko, O.V. Okhrimenko, R.A. Salmin, A.I. Maksimchuk, E.A. Strokovsky, S.N. Plyashkevich, A.A. Feschenko, S.A. Avramenko, A.I. Golokhvastov, M.H. Anikina, A.V. Averiyanov, A.M. Korotkova, N.G. Parfenova, S.V. Starikova, V.B. Dunin + 2 stud., A.V. Konstantinov

DLNP

Yu.A. Batusov, V. Tereschenko

OCE

A.N. Parfenov

Excited nuclear matter study at
U-70: finalizing of works (activity)
on the "Thermalization" program,
preparation project

E.S. Kokoulina
V.A. Nikitin

Realization
Data analysis

VBLHEP

V.I. Kireev, V.V. Avdeychikov, Yu.A. Chentsov, I.A. Rufanov, V.A. Nikitin, M.V. Tokarev, Yu.P. Petukhov, A.N. Aleev, A.I. Yukaev, N.K. Zhidkov, V.V. Pavlyuchkov, V.B. Dunin + 3 stud., V.P. Balandin, N.F. Furmanets

BLTP

E.A. Kuraev

Collaboration
Country or International Organization	City	Institute or Laboratory
Belarus	Minsk	NC PHEP BSU
		"INTEGRAL"
	Gomel	GSTU
		GSU
Czech Republic	Prague	CTU
	Rez	NRI
		NPI ASCR
Germany	Frankfurt/Main	Univ.
	Munich	LMU
	Julich	FZJ
Italy	Kosenza	UniCal
Japan	Osaka	RCNP
Russia	Moscow	SINP MSU
	Protvino	IHEP
	Syktyvkar	DM Komi SC UrD RAS
Ukraine	Kiev	BITP NASU

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