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1NICA-SPIN 2013, Dubna
FUTURE Drell-Yan FUTURE Drell-Yan experiments.experiments.
A.P. Nagaytsev, JINR, DubnaA.P. Nagaytsev, JINR, Dubna
1. Introduction.1. Introduction.
2. Drell-Yan measurements at RHIC.2. Drell-Yan measurements at RHIC.
3. DY at PANDA and PAX .3. DY at PANDA and PAX .
4. COMPASS-II.4. COMPASS-II.
5. J-PARK DY programme.5. J-PARK DY programme.
6. SPASCHARM plans6. SPASCHARM plans
7. NICA-SPD7. NICA-SPD
5. Conclusions. 5. Conclusions.
2
Experiment Status Remarks
RHIC Running Detector upgrade for DY (collider), low priority for spin physics
PANDA Plan > 2016 Unpolarized fixed target
PAX Plan > 2016 Preparation in progress
COMPASS Plan > 2014 Fixed target, only valence PDFs
J-PARC Plan > 2011 Low s (60-100 GeV2), only unpolarized proton beam
SPASCHARM
NICA
Plan?
Plan >2017
s ~ 140 GeV2 for unpolarized proton beam
s ~ 670 GeV2 for polarized & unpolarized p, d beams, high luminosity (collider)
Introduction.
NICA-SPIN 2013, Dubna
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Drell-Yan measurements at RHIC.
NICA-SPIN 2013, Dubna
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Drell-Yan measurements at RHIC.
NICA-SPIN 2013, Dubna
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Drell-Yan measurements at RHIC.
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DY at PANDA and PAX.
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DY at PANDA and PAX.
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DY at PANDA and PAX.
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DY at PANDA and PAX.
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COMPASS-II.
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COMPASS-II.
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COMPASS-II.
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COMPASS-II.
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J-PARK DY Programme.
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J-PARK DY Programme.
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J-PARK DY Programme.
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J-PARK DY Programme.
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J-PARK DY Programme.
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SPASCHARM plans.
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SPASCHARM plans.
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The following subjects are under consideration for both detectors:
► Polarization effects in heavy ion collisions using spin dependent observables in multi-particle production reactions
► Nucleon spin structure via DY and J/Ψ production processes and others.
NICA-SPD.
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Polarization effects in heavy ions collisions with MPD and SPD
The following polarization observables at NICA can be studied with MPD &SPD:• MMT-DY studies; • Λ Polarization as a probe of isotropic matter formation; • 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.
NICA-SPD.
Proposed for consideration
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Extraction of unknown (poor known) parton distribution functions (PDFs):
Boer-Mulders PDF
Sivers PDFs (Efremov,… PLB 612 (2005), PRD
73(2006));
Transversity PDF (Anselmino, Efremov, …)
Transversity and first moment of Boer-Mulders PFDs (Sissakian, Shevchenko, Nagaytsev , Ivanov, PRD 72(2005),
EPJ C46 ,2006 C59, 2009)
Longitudinally polarized sea and strange PDFs and tenzor deuteron structure (Teryaev, …)
The same PDFs from J/ production processes ( ).
*( ) ( )p D p D X l l X *( ) ( )p D p D X l l X
*( ) ( )p D p D X l l X *( ) ( )p D p D X l l X
*( ) ( )p D p D X l l X
*( ) ( )p D p D X l l X
10s GeV
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A. Sissakian, O. Shevchenko, O. Ivanov, (Dubna, JINR). arXiv:0710.1791
NICA-SPD.
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Energy, GeV 5 12
Proton number per bunch 6E10 1.5E10
Rms relative momentum spread
10E-3 10E-3
Rms bunch length, m 1.7 0.8
Rms (unnormalized)emittance,
0.24 0.027
Beta-function in the IP, m 0.5 0.5
Lasslet tune shift 0.0074 0.0033
Beam-beam parameter 0.005 0.005
Number of bunches 10 10
Luminosity, cm-2∙s-1 1.1E30 1.1E30
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Parameters of polarized proton beams
I.Meshkov, Yu.Filatov, Polarized Beams in NICA, SPIN2010, Sep 27-Oct 02, 2010, Juelich
NICA-SPD.
1 3 5 7 9 11 130.01
0.1
1
10
100
0.01
0.1
1
10
100
L Ei N Ei
Ei
NICA Collider Luminosity in pp CollisionsIP parameters: * = 35 cm, bunch length s = 60
cm (not optimized) Bunch number = 22, CRing = 503 m
Proton energy Ei in Gev unitsLuminosity L(Ei) in 1030 cm-2s-1 units,
particle number per bunch N (Ei) in in 1011 units,
max. proton number in each ring 2.21013
Private communication by I.Meshkov
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MC simulation for the feasibility studies of DY polarized processes
The SSA asymmetries. Top:access to transversity and Boer-Mulders PDFs.
(Sissakian, Shevchenko, Nagaytsev,PRD 72 (2005), EPJ C46 (2006))
Bottom: access to Sivers PDFs (Efremov,… PLB 612(2005), PRD 73(2006)); Alsymmetries are estimated for 100 K DY events
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A.N. Sissakian, O.Yu. Shevchenko, A.P. Nagaytsev, O.N. Ivanov, Phys.Part.Nucl.41:64-100,2010.
NICA-SPD.
σDY, total, nb L, cm -2s-1 K events
PAX, s=14.6 GeVNICA, s=20 GeV NICA, s=26 GeV
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1.3
1030
1030
1030
~1057
Estimations were done for 1 month of data taking. For 3 years of data taking: we expect to take ~100K DY events. (in table, graphs Mll>2
GeV)
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CONCLUSIONS.
NICA-SPIN 2013, Dubna
April 2, 2008 A.N.Sissakian, A.S.Sorin 27
Thank you for attention!
Collaborators are welcomed !
28NICA-SPIN 2013, Dubna