Cooperation between physicists of JINR and ITALY

100th Session of the JINR Scientific Council – Dubna, 27 March 2006

P. Spillantini – INFN and University, Florence, Italy

at JINR(33 year later)

(1969)

The post-war dream (1946)....

Self-shunted streamer chamber

at LNP (Synchrocyclotron) at JINR (’70-’80)

and at LEAR in CERN (’80-’90)

(m( ) < 2.2 MeV)

antip-Ne (’83)

Magnetic hybrid Spectrometer (MIS)at Serpukhov

(Bologna, Milano, JINR)

Among main results

new radially excitated status of the pion:

mass= 1240±50 MeV = 360±35 MeVmass= 1770±30 MeV = 310±50 MeV

(’77-’90)

Collaboration with the Bogoliubov Theoretical Physics Laboratory

- Participation to workshops, schools, meetings organized by JINR

- Participation of JINR physicists to activities organized by Italian institutions

- fellowships, grants, visists of JINR physicists in Italy

NA48/2NA48/2NA48/2 experiment NA48/2 experiment at CERN SPSat CERN SPS

Re(’) = (14.7 2.2) 10-4

Experiments NA48, NA48/1, NA48/2 (SPS @ CERN)

LKr cryostat – first ISTC - CERN CP-violating parameter in K0 2 decays

+ 23 t of Krypton-Russian Industry for CERN experiment

05

101520253035

1993 1993 1999 2001 2002 2003

E731

NA31KTeV

NA48

х 10-4

Cusp Effect

M(π0π0), GeV/c2

K ± -> π±π0π0

(a0-a2)m(π+) = 0.264 ± 0.015 AAgg

00 = (1.8 ± = (1.8 ± 2.6)2.6)1010-4-4

AAgg00 = (1.8 ± = (1.8 ±

2.6)2.6)1010-4-4

““Charged” mode Charged” mode KK±±33±±

““Neutral” mode KNeutral” mode K±±0000±±

New NA48/2 results on direct CP-violating charge

asymmetry in K±3 slopes

First Observation KS 0e +e –

KS 0KS 0γγ

AAggcc =(1.7 ± 2.9) =(1.7 ± 2.9)1010--

44

AAggcc =(1.7 ± 2.9) =(1.7 ± 2.9)1010--

44

Experiments at CERN with participation of INFN and JINR

LHC ALICE 11 branches INFN and JINRATLAS 15 branches INFN and JINRCMS 13 branches INFN and JINR

PS NTOF 7 branches INFN and JINRDIRAC 2 branches INFN and JINRHARP 9 branches INFN and JINR

SPS CNGS 7 branches INFN and JINRNA48 5 branches INFN and JINRDIMUONS 3 branches INFN and JINRIONS/HYP. 5 branches INFN and JINRCOMPASS 3 branches INFN and JINR

INFN branchesInvolved

ALBABOCACSCTFEFI

GEIAEALE

LNFLNLLNSMINAPDPGPIPV

RM1RM2RM3SATOTSUD

+ LEP (DELPHI)

Experiments at other laboratories with participation of INFN and JINR

-- DESY

-- FERMILAB

-- BNL

THE WORLD BEST TOP MASS MEASUREMENT

World Best : MTOP= 173.5 + 3.7/-3.6 (stat.) +/- 1.3 (syst.) “Lepton + jets” mode A

New Precise: MTOP= 169.8 + 9.2/-9.3 (stat.) +/- 3.8 (syst.) “Dilepton” mode B

The JINR/CDF Team of J.Budagov, G.Chlachidze, V.Glagolev, F.Prokoshyn, A.Sissakian, I.Suslov together with

G.Bellettini (INFN) and G.Velev(FNAL)

contributed strongly to the M(top) measurement in p p -> t t +… :

A B

E1-2005-131 E1-2005-129

Collaboration at Gran Sasso undermountain laboratories:

- Borexino

- Opera

BOREXINO: detector

18m

13.7m

•Main GoalMain Goal: : sub-MeV neutrinos detection (solar-Be7)•Target mass = 300/100tons organic scintillatorPC + PPO (1.5g/l)•Detection by ES careful background subtraction + high level of radiopurity required

BOREXINO: subsystemsScintillator purification systems:Water extractionVacuum distillationSilicagel adsorption

CTF + DI Water plant

Storage tanks: 300tons of PC

detector

Dubna team (LPP) did the following:

Dubna group of JINR has performed the following jobs in the frame of identifying common tasks and collaborating teams from both sides.

• - testing of VME electronics for the experiment,• - tuning flash electronics and analysis• - participated in the PMT finishing, the mounting and cleaning• - participation in production of the analog electronic modules for

the experiment • - proposed suggestion for upgrading Borexino prototype to be

able to study solar pp-neutrino.• - calibration big size of PMT in monitor and muon system (more

than 2700PMT)• - complete DAQ production and test of the program complex• - Dubna physicists suggested and made the analysis of the data

of CTF-detector, which gives a new physical results

Future plan

• Expected fill operations in 2006 that will bring the Borexino detector to the data taking stage :

• Data taking with water -3-4 monthes

• Start filling scintillanting liquid and than

• Start data taking

Collaboration "Ion sources for accelerator injection" of INFN-LNS (Catania) – IPPLM (Warsaw) – IP (Praha) – JINR (Dubna).

The Collaboration was based on the coupling of a LIS and an ECR ion source.

SERSEion source

Beam line

FIG 1 – A photo of the SERSE source

Fig. 2 – The ECRIS area at INFN-LNS.

For the next future:

- Continuation of bilateral and multilateral collaboration in Theoretical Physics

- Participation to space expt’s TUS and NUCLEON envisaged

- Participation to the SAD project now discussed

- Continuation of common development of intense ion sources

- Common course on accelerator physics envisaged

- Continuation of common activities in international expt’s at CERN + other laboratories

- Continuation of common expt’s at the JINR accelerators

- Participation of JINR to underground experimens at LNGS