nica-spin 2013, dubna

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.

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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.


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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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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.


April 2, 2008 A.N.Sissakian, A.S.Sorin 27

Thank you for attention!

Collaborators are welcomed !

28NICA-SPIN 2013, Dubna

nica-spin 2013, dubna

Documents

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nica collider luminosity

spin dependent observables

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mmtdy studies polarization

drellyan measurements

j production processes