Presentation on theme: "1 NICA-SPIN 2013, Dubna FUTURE Drell-Yan experiments. A.P. Nagaytsev, JINR, Dubna 1. Introduction. 2. Drell-Yan measurements at RHIC. 3. DY at PANDA and."— Presentation transcript:
1 NICA-SPIN 2013, Dubna FUTURE Drell-Yan experiments. A.P. Nagaytsev, JINR, Dubna 1. Introduction. 2. Drell-Yan measurements at RHIC. 3. DY at PANDA and PAX. 4. COMPASS-II. 5. J-PARK DY programme. 6. SPASCHARM plans 7. NICA-SPD 5. Conclusions.
2 ExperimentStatusRemarks RHICRunning Detector upgrade for DY (collider), low priority for spin physics PANDAPlan > 2016Unpolarized fixed target PAX Plan > 2016 Preparation in progress COMPASSPlan > 2014Fixed target, only valence PDFs J-PARCPlan > 2011 Low s (60-100 GeV 2 ), only unpolarized proton beam SPASCHARM NICA Plan? Plan >2017 s ~ 140 GeV 2 for unpolarized proton beam s ~ 670 GeV 2 for polarized & unpolarized p, d beams, high luminosity (collider) Introduction. NICA-SPIN 2013, Dubna
3 Drell-Yan measurements at RHIC. NICA-SPIN 2013, Dubna
4 Drell-Yan measurements at RHIC. NICA-SPIN 2013, Dubna
5 Drell-Yan measurements at RHIC. NICA-SPIN 2013, Dubna
21 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. NICA-SPIN 2013, Dubna
22 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 NICA-SPIN 2013, Dubna
23 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 ( ). 23 A. Sissakian, O. Shevchenko, O. Ivanov, (Dubna, JINR). arXiv:0710.1791 NICA-SPD. NICA-SPIN 2013, Dubna
24 Energy, GeV512 Proton number per bunch6E101.5E10 Rms relative momentum spread 10E-3 Rms bunch length, m1.70.8 Rms (unnormalized)emittance,0.240.027 Beta-function in the IP, m0.5 Lasslet tune shift0.00740.0033 Beam-beam parameter0.005 Number of bunches10 Luminosity, cm -2 s -1 1.1E30 24 Parameters of polarized proton beams I.Meshkov, Yu.Filatov, Polarized Beams in NICA, SPIN2010, Sep 27-Oct 02, 2010, Juelich NICA-SPD. NICA Collider Luminosity in pp Collisions IP parameters: * = 35 cm, bunch length s = 60 cm (not optimized) Bunch number = 22, C Ring = 503 m Proton energy E i in Gev units Luminosity L (E i ) in 10 30 cm -2 s -1 units, particle number per bunch N (E i ) in in 10 11 units, max. proton number in each ring 2.2 10 13 Private communication by I.Meshkov
25 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 25 A.N. Sissakian, O.Yu. Shevchenko, A.P. Nagaytsev, O.N. Ivanov, Phys.Part.Nucl.41:64-100,2010. NICA-SPD. σ DY, total, nbL, cm -2 s -1 K events PAX, s=14.6 GeV NICA, s=20 GeV NICA, s=26 GeV 2 1 1.3 10 30 ~10 5 7 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 M ll >2 GeV) NICA-SPIN 2013, Dubna
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