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SPIN PHYSICS AT NICSPIN PHYSICS AT NICAA

A.P. Nagaytsev, JINR , DubnaA.P. Nagaytsev, JINR , Dubna

1. NICA Project.1. NICA Project.

2. Proposed measurements.2. Proposed measurements.

3. LOI preparation.3. LOI preparation.

4. Conclusions. 4. Conclusions.

ADVANCED STUDIES INSTITUTE SYMMETRIES AND SPIN, NICA-SPIN-2013, Prague, July 7 - 13, 2013

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The purpose of Spin Physics program at NICA is the study of the nucleon spin structure with high intensity polarized light nuclear beams

NICA collider option with the light nuclear beams with the proton and deuteron ones.

Collider can allow us to reach very high collision proton energy up to s ~ 26 GeV with the luminosity up to 1032 cm2/s (fors ~ 26 GeV) .

For deuteron beams the collision energy per nucleon up to s ~ 12 GeV with the average luminosity up to 1031 cm2/s (fors ~ 12 GeV) .

Both proton and deuteron beams can be effectively polarized.

All these advantages give us unique possibilities to investigate at NICA the polarized phenomena and nucleon spin structure - one of the main tasks of the modern high energy physics 2

NICA Project. NICA Project.

Reports by D.Peshekhonov Reports by D.Peshekhonov and A.Kovalenko and A.Kovalenko

ADVANCED STUDIES INSTITUTE SYMMETRIES AND SPIN, NICA-SPIN-2013, Prague, July 7 - 13, 2013

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The following subjects are under consideration:

► DY processes.

► J/ production processes.

► Studies of elastic reactions.

► Spin effects in one and two hadron production processes.

► Prompt photons.

► Spin effects in inclusive high-pT reactions.

► Final spin states effects and polarization effects in heavy ion collisions.

Proposed measurements.Proposed measurements.

ADVANCED STUDIES INSTITUTE SYMMETRIES AND SPIN, NICA-SPIN-2013, Prague, July 7 - 13, 2013

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Proposed measurements. Proposed measurements. DY prosesses. DY prosesses.

ADVANCED STUDIES INSTITUTE SYMMETRIES AND SPIN, NICA-SPIN-2013, Prague, July 7 - 13, 2013

Reports by A.Efremov and Reports by A.Efremov and O.Shevchenko O.Shevchenko

The measurement of pretzelosity PDF is also under consideration.

Crucial test of our understanding of T-odd effects within QCD and the factorization approach to the processes sensitive to transverse parton momenta.

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Proposed measurements. Proposed measurements. J/ J/ΨΨ processes. processes.

Tests of models for unpolarized/polarized J/production (gluon evaporation, NRQCD,...)

Transversity and Boer-Mulders PDFs from J/production with low s (duality model), report by O.Shevchenko

Transverse SSA (Sivers PDF), J/ polarization, report by E.Zemlyanichkina

ADVANCED STUDIES INSTITUTE SYMMETRIES AND SPIN, NICA-SPIN-2013, Prague, July 7 - 13, 2013

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Proposed measurements. Proposed measurements. Studies of elastic Studies of elastic reactions.reactions.

Differential cross section in pp, An Ann up to maximal values of -t.

Krisch effect. Especially important for pd and dd elastic reactions.

Measurements of amplitudes of elastic pp cross section.

Total cross sections for elastic pp

and pd reactions in pure initial spin states.

Comparison of the differential

cross sections and analyzing powers of elastic and quasielastic pp reactions.

Polarimetry with elastic

quasielastic reactions

ADVANCED STUDIES INSTITUTE SYMMETRIES AND SPIN, NICA-SPIN-2013, Prague, July 7 - 13, 2013

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Proposed measurements. Proposed measurements. Prompt photons. Prompt photons.

ADVANCED STUDIES INSTITUTE SYMMETRIES AND SPIN, NICA-SPIN-2013, Prague, July 7 - 13, 2013

Report by A.Guskov Report by A.Guskov

Prompt photons produced in pp interaction

Access to gluon Sivers function via STSA:

Access to gluon polarization via DLSA:

1 2x x

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Proposed measurements. Proposed measurements. Spin effects in Spin effects in inclusive high-pinclusive high-pTT reactions.reactions. Problems not resolved up to now at xT ~ 1:

-double spin pp-elastic scattering at 900 c.m.s.;-one spin asymmetries (pions);-hyperon’s polarization;-deuteron spin structure for internal momentum > 250 MeV/c.

9NNs GeV

Reactions :-pp-, np- and nn-interactions from dd-collisions;- double spin NN-elastic scattering at 900 c.m.s.;-exclusive- Nd – collisions with asymmetric energies.

;NN BB MM reactions

Advantages NICA-SPIN project: - acceleration polarized p, d, 3He(?) beams;- unique spin conservation technic;- tagging stations.

ADVANCED STUDIES INSTITUTE SYMMETRIES AND SPIN, NICA-SPIN-2013, Prague, July 7 - 13, 2013

Report by S.Shimansky

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Proposed measurements. Proposed measurements. Final spin states effects, Final spin states effects,

Polarization effects in heavy Polarization effects in heavy ion collisions.ion collisions.

Initial and final state spin effects with SPD/MPD/BM@N The following polarization observables are also under consideration: • Polarization of Λ as a probe of formation of isotropic matter; • Correlations of Λ polarization with charge separation as a complementary signal for CP-violation in dense matter ,• Transverse handedness as a probe for collective orbital momentum of the matter, • Tensor polarization of dileptons as a complementary probe of matter formation, dilepton production mechanisms and collective orbital momentum,• T-odd and T-even effects - vector and tensor polarization • Rotating QCD matter • Spin effects - search for signs of global rotation • Chiral Vortical Effect & neutron asymmetries. Report by O.Teryaev

ADVANCED STUDIES INSTITUTE SYMMETRIES AND SPIN, NICA-SPIN-2013, Prague, July 7 - 13, 2013

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LoI preparation.LoI preparation.

LoI for spin physics experiments at NICA is under preparation.Several international workshops NICA-SPIN 2013 are organized.

The first workshop was in Dubna (see http://nica.jinr.ru/files/Spin_program/NICA-SPIN2013/program.html),

the second will be in Prague (http://thsun1.jinr.ru/~praha/2013),

the third one will be at Dubna during the DSPIN2013 workshop (http://theor.jinr.ru/~spin/2013).XV WORKSHOP ON HIGH ENERGY SPIN PHYSICS

                                            Dubna, Russia, October 8 - 12, 2013

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LoI preparation.LoI preparation.

ADVANCED STUDIES INSTITUTE SYMMETRIES AND SPIN, NICA-SPIN-2013, Prague, July 7 - 13, 2013

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The preliminary design of (SPD) detector for spin effects studies is based on the requirements for the measurements of the DY, J/Ψ, photon and meson productions. These requirements are the following:

•Almost 4 geometry;•precision vertex detector;•precision tracking system ;•precision momentum measurement;•good particle identification capabilities;•high trigger rate capabilities.

Report by V.Rodionov

LoI preparation.LoI preparation.

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Conclusions.Conclusions.

ADVANCED STUDIES INSTITUTE SYMMETRIES AND SPIN, NICA-SPIN-2013, Prague, July 7 - 13, 2013

The project on NICA Spin studies is under preparation at 2nd interaction point of the collider. LoI preparation is in progress.The purpose of proposed measurements is the study of the nucleon spin structure with high intensity polarized light nuclear beams.- high collision proton (deuteron) energy up to √s ~ 26(12) GeV- the average luminosity up to ~ 1032 cm2/s - both proton and deuteron beams can be effectively polarized.

The main topics are:1. Studies of MMT-DY processes with longitudinaly and transversely polarized p and D beams. Extraction of unknown (poor known) parton distribution functions (PDFs). 2. PDFs from J/Ψ production processes.3.Spin effects in one and two hadron production processes.4. Direct photons.5. Cross sections, helicity amplidudes and double spin asymmetries (Krisch effect). in elastic reactions.6. Final spin states effects and polarization effects in heavy ion collisions.

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