Bogoliubov Lab Theor Phys Phys JINR Dubna PG
Bogoliubov Lab. Theor Phys. , Phys JINR, Dubna PG INFN L. KAPTARI (BLTh, Dubna & INFN, Perugia) SIDIS off He-3 and Final State Interaction Effects with 8 -12 June, 2015 1
Bogoliubov Lab. Theor Phys. , Phys JINR, Dubna PG INFN 1. Introduction: “Standard” SIDIS 8 -12 June, 2015 2
Single Spin Asymetry HERMES, COMPASS, JLAB Polarized neutron? Single Target-Spin Asymmetry in Semi-Inclusive p Electroproduction on a Transversely Polarized 3 He Target (JLAB, E 03 -004(010, 011), EPJ Plus, 126 (2011) 2) 8 -12 June, 2015 3
Single Target-Spin Asymmetry in Semi-Inclusive p Electroproduction on a Transversely Polarized 3 He Target (JLAB, E 03 -004(010, 011), EPJ Plus, 126 (2011) 2) PWIA What’s PWIA? 8 -12 June, 2015 4
Bogoliubov Lab. Theor Phys. , Phys JINR, Dubna g Q 2 n m p p m X m AV 18 m m PG INFN p Exact factorization & the nuclear spectral function Cd. A & LPK Phys. Rev. C 66 (2002) 044004 many-body problem 8 -12 June, 2015 5
Bogoliubov Lab. Theor Phys. , Phys JINR, Dubna PG INFN 8 -12 June, 2015 6
Bogoliubov Lab. Theor Phys. , Phys JINR, Dubna PG INFN 8 -12 June, 2015 7
Bogoliubov Lab. Theor Phys. , Phys JINR, Dubna PG INFN C. Ciofi degli Atti, S. Scopetta, E. Pace, G. Salme, PR. C 48 (1993) 968. 8 -12 June, 2015 8
a) A realistic spin-dependent spectral function of 3 He within the AV 18 interaction and w. f. by the Pisa group (A. Kievsky et al. , NPA 577, 511 (1994). ) b) Parameterizations of data for pdfs and fragmentation functions whenever available c) Models for the unknown pdfs and fragmentation functions. S. Scopetta, Phys. Rev. D 75 (2007) 054005 full – “free” neutron (input) dot - extracted without prt dash – extracted with dilution factors 8 -12 June, 2015 9
Results from q. e. 3 He(e, e’)p. D, 3 He(e, e’)ppn Cd. A & LPK, PRL 95, 052502 (2005), R. Schiavilla et al, PRC. 72 064003 (2005), L. Frankfurt, M. Sargsian, M. Strikman Int. J. Mod. Phys. A 23 (2008) 2291 M. M. Rvachev et al. , PRL 94(2005) 192302 10
1 2 3 4 5 etc FACTORIZATION 11 Cd. A &LPK Phys. Rev. Lett. 100 (2008) 122301
SIDIS AND FSI-EFFECTS Color string model + gluon radiation 12
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M. Alvioli, Cd. A & LPK PRC 81 (Rapid Comm. ) (2010) 02100, R. Schiavilla et al, PRC. 72 064003 (2005), 14
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NEUTRON PROTON 8 -12 June, 2015 16
DILUTION FACTORS PWIA: FSI: 8 -12 June, 2015 17
Extracted Asymmetries 8 -12 June, 2015 18
1 PWIA describes data fairly well at low and moderate intrinsic momenta (up to 250 -300 Me. V/c) 2 PWIA + GEA describes data in the whole kinematical region in q. e. (s = s. NN) high energy e. m. processes off 3 He 3 PWIA + GEA with factorization adequately describes unpolarized spectator SIDIS (s = seff (t, Q 2, x. Bj) ) at intrinsic momenta up to 400 -500 Me. V/c 4 Since in the “standard” SIDIS processes one integrates over undetected removal energy and momenta (from 0 to infinity) the PWIA + GEA (s = seff (t, Q 2, x. Bj) ) with factorization can be applied to extarct free Information information also from polarized SIDIS processes 8 -12 June, 2015 19
Tagging the Nucleon Structure in the “Spectator” SIDIS C. Ciofi degli Atti, L. P. K. , S. Scopetta, EPJA 5 (1999) 191; PRC 83 (2011) 044602, ; C. Ciofi degli Atti, L. P. K. , B. Kopeliovich, EPJ A 19, (2004), 133 C. Ciofi degli Atti, L. P. K. , and C. Mezzeti Fizika B 20 (2011) 161 CLAS, Phys. Rev. C 89 (2014) 4, 045206, Phys. Rev. C 90 (2014) 5, 059901 L. P. K. , A. Del Dotto, E. Pace, G. Salm`e, S. Scopetta. , PRC 89 (2014) 035206 8 -12 June, 2015 20
Tagging the Nucleon Structure in in the “Spectator” SIDIS Tagging e’ e’ e X N N N A=D (A-1) Deeps(BONUS) CLAS, PRC 89 (2014) 4, 045206, 8 -12 June, 2015 PRC 90 (2014) 5, 059901
Tagging the Nucleon Structure in in the “Spectator” SIDIS Tagging 8 -12 June, 2015
Tagging the Hadronization Mechanism 23
Tagging the Spin Dependent Spectral Function L. P. K. , A. Del Dotto, E. Pace, G. Salm`e, S. Scopetta. , PRC 89 (2014) 035206 AV 18 8 -12 June, 2015 24
AV 18 25
Tagging the EMC-effect C. Ciofi degli Atti, L. P. K. , S. Scopetta, EPJA 5 (1999) 191; Cd. A, LPK, PRC 83 (2011) 044602, ; 8 -12 June, 2015 26
SUMMARY 27
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Bogoliubov Lab. Theor Phys. , Phys JINR, Dubna PG INFN q. e. 3 He(e, e’)p. D 8 -12 June, 2015 30
Bogoliubov Lab. Theor Phys. , Phys JINR, Dubna PG INFN Multiple Scattering Contributions Cd. A & LPK, PRL 95, 052502 (2005), R. Schiavilla et al, PRC. 72 064003 (2005) dσ(pm) has different (three) slopes PWIA Single Double JLAB, 17 Apr. 2013 different Multiple Scattering Components 31
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JLAB, 17 Apr. 2013 33
Bogoliubov Lab. Theor Phys. , Phys JINR, Dubna PG INFN JLAB, 17 Apr. 2013 34
Bogoliubov Lab. Theor Phys. , Phys JINR, Dubna PG INFN 3 bbu JLAB 89084 Cd. A & LPK, PRL 95, 052502 (2005), L. Frankfurt, M. Sargsian, M. Strikman Int. J. Mod. Phys. A 23 (2008) 2291 35
Bogoliubov Lab. Theor Phys. , Phys JINR, Dubna PG INFN 8 -12 June, 2015 36
“II” means along SA 37
- Slides: 37