SPIN PHYSICS AT NICA

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SPIN PHYSICS AT NICA A.P. Nagaytsev, JINR , Dubna

1. NICA Project. 2. Proposed measurements. 3. LOI
preparation. 4. Conclusions.
ADVANCED STUDIES INSTITUTE SYMMETRIES AND SPIN,
NICA-SPIN-2013, Prague, July 7 - 13, 2013
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NICA Project.
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 Цs 26 GeV with the luminosity up to 1032
cm2/s (for Цs 26 GeV) . For deuteron beams the
collision energy per nucleon up to Цs 12 GeV
with the average luminosity up to 1031 cm2/s (for
Цs 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
Reports by D.Peshekhonov and A.Kovalenko
ADVANCED STUDIES INSTITUTE SYMMETRIES AND SPIN,
NICA-SPIN-2013, Prague, July 7 - 13, 2013
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Proposed measurements.

• The following subjects are under consideration
• ? DY processes.
• ? J/Y 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.

ADVANCED STUDIES INSTITUTE SYMMETRIES AND SPIN,
NICA-SPIN-2013, Prague, July 7 - 13, 2013
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Proposed measurements. DY prosesses.
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.
Reports by A.Efremov and O.Shevchenko
ADVANCED STUDIES INSTITUTE SYMMETRIES AND SPIN,
NICA-SPIN-2013, Prague, July 7 - 13, 2013
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Proposed measurements. J/? processes.
Tests of models for unpolarized/polarized J/Y
production (gluon evaporation, NRQCD,...)
Transversity and Boer-Mulders PDFs from J/Y
production with low s (duality model), report by
O.Shevchenko
Transverse SSA (Sivers PDF), J/Y 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. Studies of elastic
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. Prompt photons.

Prompt photons produced in pp interaction
Access to gluon Sivers function via STSA
Access to gluon polarization via DLSA
Report by A.Guskov
ADVANCED STUDIES INSTITUTE SYMMETRIES AND SPIN,
NICA-SPIN-2013, Prague, July 7 - 13, 2013
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Proposed measurements. Spin effects in
inclusive high-pT reactions.

• Problems not resolved up to now at xT 1
• double spin pp-elastic scattering at 900 c.m.s.
• one spin asymmetries (pions)
• hyperons polarization
• deuteron spin structure for internal
• momentum gt 250 MeV/c.

• 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.

Advantages NICA-SPIN project - acceleration
polarized p, d, 3He(?) beams- unique spin
conservation technic- tagging stations.
Report by S.Shimansky
ADVANCED STUDIES INSTITUTE SYMMETRIES AND SPIN,
NICA-SPIN-2013, Prague, July 7 - 13, 2013
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Proposed measurements. Final spin
states effects, Polarization effects in heavy ion
collisions.
Initial and final
state spin effects with SPD/MPD/BM_at_N
The following polarization observables are also
under consideration Polarization of ? as a
probe of formation of isotropic matter
Correlations of ? 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 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/2
013), the third one will be at Dubna during the
DSPIN2013 workshop (http//theor.jinr.ru/spin/201
3).
XV WORKSHOP ON HIGH ENERGY SPIN PHYSICS
                                           
Dubna, Russia, October 8 - 12, 2013
ADVANCED STUDIES INSTITUTE SYMMETRIES AND SPIN,
NICA-SPIN-2013, Prague, July 7 - 13, 2013
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LoI preparation.
ADVANCED STUDIES INSTITUTE SYMMETRIES AND SPIN,
NICA-SPIN-2013, Prague, July 7 - 13, 2013
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LoI preparation.

• The preliminary design of (SPD) detector for
  spin effects studies is based on the requirements
  for the measurements of the DY, J/?, 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
ADVANCED STUDIES INSTITUTE SYMMETRIES AND SPIN,
NICA-SPIN-2013, Prague, July 7 - 13, 2013
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Conclusions.

• 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
  vs 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/? 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.

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