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Dis2013 spin highlights

Francesca Giordano
Francesca Giordano

This document summarizes a presentation on spin physics given at DIS2013. It discusses the proton structure and how generalized parton distributions (GPDs) and transverse momentum dependent distributions (TMDs) can provide three-dimensional pictures of the proton. It also addresses the "spin puzzle" regarding the intrinsic spin contributions of quarks and gluons and ongoing efforts to better understand the polarization of sea quarks and gluons through experiments measuring W boson production. Precision data on hadron multiplicities and the transverse spin structure of the nucleon from experiments like HERMES, COMPASS and JLab were also discussed.

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DIS2013, April 22-26, 2013, Marseille, France Francesca Giordano (UIUC), Alessandro Bacchetta (Uni Pavia, INFN) Marco Contalbrigo (INFN) Marcin Stolarski (LIP) HIGHLIGHTS FROM SPIN PHYSICS 1
F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski The proton structure 2 GPDs (x, bT) TMDs (x, kT) x zy kT S xp xz y xp bT
F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski The proton structure 3 GPDs (x, bT) TMDs (x, kT) x zy kT S xp xz y xp bT PDFs (x) TMDs(x,kT) ... dkT GPDs(x,bT) ... dbT
F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski The proton structure 4 GPDs (x, bT) TMDs (x, kT) x zy kT S xp xz y xp bT PDFs (x) TMDs(x,kT) ... dkT GPDs(x,bT) ... dbT Form Factors (t) Fourier transform (bT) & GPDs(x, t) ... dx
F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski Spin puzzle 5 1 2 = 1 2 + Lq + G + Lg 1 2 G Lq Lg
F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski6 X Dq h h X Dq h h e- X Dq h h e- e+ Complementary reactions: Global analyses needed! Evolution Factorization Universality Spin puzzle e-
F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski7 X Dq h h X Dq h h e- X Dq h h e- e+ Complementary reactions: Global analyses needed! Evolution Factorization Universality Spin puzzle
F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski DIS 2013: spin session 8 Gevorg KARYAN Nour MAKKE Charlotte VAN HULSE Harold E JACKSON Jr Isabella GARZIA Unpolarized Hoyoung KANG Vincent ANDRIEUX Alberto ACCARDI Sanghwa PARK Bernd SURROW Emanuele Roberto NOCERA Quark Helicity Gluon Helicity Mickey CHIU Carl GAGLIARDI Luis SILVA Grant WEBB Murad SARSOUR Stephen GLISKE GPDs Sergey YASCHENKO Marat SIDDIKOV Jakub WAGNER Samuel WALLON Bohdan MARIANSKI Katharina SCHMIDT Isabella GARZIA Mher AGHASYAN Anna MARTIN Bakur PARSAMYAN Christopher BRAUN Stephen GLISKE Markus DIEHL Alexei PROKUDIN Maarten BUFFING Ignazio SCIMENI Wilco DEN DUNNEN Kazuhiro TANAKA Fabio DOMINGUEZ Koichi KANAZAWA Stefano MELIS Aurore COURTOY Zhun LU TMD theory TMD exp TMD phenomenology Jacques SOFFER Stefano MELIS Steven HEPPELMANN Oleg EYSER pp AN 18 27 Experiment Theory
F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski 6 7 20 12Long. spin TMDs GPDs Other DIS 2013: spin session 9 18 27 Experiment Theory
F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski Isabella Garzia DIS-2013 Test of Hadronization Models Default parameters used: (based on previous data: higher energies plus ARGUS data) Large discrepancies in general - all the models qualitatively describe the bulk of the spectra - no model describes any spectrum in detail Peak positions consistent with data (except for the HERWIG K賊) Similar discrepancies observed at higher energies - often of the same sign - the models do a reasonable job of describing the scaling properties? 11 Preliminary 0.5% precision data! 21 Comparison to world data High-precision unpolarized data 10
F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski 23 April, DIS 2013 Hadron multiplicities at HERMES, Gevorg Kar Rea betwe for po pions Sub betwe for ne kaon LO c Mh ( hermes Charged+pion+mul)plici)es+vs+(x,y,z)+ DIS$2013,$Marseille,$April$22326$$N.$Makke$ 0 2 0 2 M(z) 0 1 0 2 0.5 1 0 2 0.5 1 0 2 0 0.5 0.5 1 0 1 0.5 1 0 2 0.5 1 0 2 0.5 1 0 2 0.5 1 0 0.5 0.5 1 0 1 0.5 1 0 2 0.5 1 0 2 0.5 1 0 2 0.5 1 0 0.5 0.5 1 0 1 0.5 1 0 2 0.5 1 0 2 0.5 1 0 2 0.5 1 0 0.5 0.5 1 0 1 0.5 1 0 2 0.5 1 0 2 0.5 1 0 2 0.5 1 0 1 0.5 1 0 2 0.5 1 0 2 0.5 1 0 2 + 0.5 1 0 2 0.5 1 0 2 z 0.5 1 0.5 1 0 2 0.5 1 0 2 0.5 1 x y COMPASS Preliminary 0.004 0.01 0.02 0.03 0.04 0.06 0.10 0.15 0.70 0.10 0.15 0.20 0.30 0.50 0.70 ew+ SIDIS: essential for 鍖avor separation 11 High-precision unpolarized data
F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski 14 Including all corrections: JAM Higher twist contributions are manifestly important for current DIS data Considerable improvement of for JLab and some SLAC data sets (globally , ) Relevant for both and Progress in helicity extractions Important corrections at high x The JAM collaboration www.jlab.org/jam Parallel effort to our unpolarized PDFs: CJ and JR 12
F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski Strange helicity puzzle Including SIDIS inclusive DIS only Better knowledge of Fragmentation Functions is needed for SIDIS 13
F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski Sea helicity 14 Measured asymmetries (Run 9) are in agreement with theory evaluations using polarized pdfs (DSSV) constrained by polarized DIS data Universality of helicity distr. functions! e侶 2 1 0 1 2 0.6 0.4 0.2 0 0.2 0.4 0.6 LA W+ W~p + p ! W賊 + X ! e賊 + X 25 < Ee T < 50 GeV RHICBOS DNS K DNS KKP DSSV08 CHE DSSV08 W W+ e侶 2 1 0 1 2 0.6 0.4 0.2 0 0.2 0.4 0.6 LA W+ W~p + p ! W賊 + X ! e賊 + X 25 < Ee T < 50 GeV RHICBOS DNS K DNS KKP DSSV08 CHE DSSV08 W W+ DSSV08 LO with 2 = 1 pdf error onal Workshop on DIS and Related Subjects - DIS2013 ance, April 22-26, 2013 Bernd Surrow 17 AR W AL results / projections Critical: Measurement of W+ and W- asymmetries as a function 侶e Major step forward in Run 12: Large AL (W- ) asymmetry above DSSV suggests large anti-u quark polarization Extension of backward / forward 侶e acceptance enhances sensitivity to anti-u / anti-d quark polarization STAR Forward GEM Tracker (1<|侶e|<2) e侶 2 1 0 1 2 0.6 0.4 0.2 0 0.2 0.4 0.6 LA W+ W~p + p ! W賊 + X ! e賊 + X 25 < Ee T < 50 GeV RHICBOS DNS K DNS KKP DSSV08 CHE DSSV08 W W+ DSSV08 LO with 2 = 1 pdf error Run 9 sys. error || < 1.5 L = 250 pb 1 1.5 < || < 2.0 L = 165 pb 1 P = 55% 5% sys. error beam pol. STAR Run 12 + Run 13 Projections p s = 500 GeV At the end of the RHIC W program we expect a signi鍖cant improvement in the light sea helicity knowledge: DSSV Still collecting data!
F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski Gluon is not constrained by inclusive DIS in collaboration with R.D. Ball, S. Forte, A. Guanti, G. Ridol鍖 and J. Rojo Universit`a degli studi di Milano & INFN, sezione di Milano Parc Chanot Marseille - April, 23 2013 Emanuele R. Nocera (UNIMI) NNPDFpol1.0 April 2013 1 / 21 15 Gluon helicity
F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski Gluon helicity 16 -0.1 0 0.1 0.2 10 -2 10 -1 DSSV DSSV++ Q 2 = 10 GeV 2 x g x RHIC 200 GeVSilva 23 Apr 2013(lsilva@lip.pt) 15/16 G Results: LO and NLO D 87, 052018 (2013) syst) xg = 0.110.05 +0.11 , 2 = 13 GeV/c2 (syst) xg = 0.200.08 +0.13 , 亮2 = 13 (GeV/c)2 Carl Gagliardi DIS2013 Gluon Polarization and Jet Production in STAR 11 ALL for inclusive jets: 2006 to 2009 2009 STAR inclusive jet ALL measurements are a factor of 3 (high-pT) to >4 (low-pT) more precise than 2006 Results fall between predictions from DSSV and GRSV-STD Precision sufficient to merit finer binning in pseudorapidity STARSTAR Including part of the Phenix and Star data
F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski From Form Factors to GPDs Ju v = 0.230+0.009 0.024 Jd v = 0.004+0.010 0.016 Ji sum rule: R = GE/(GM /袖) 17 H, E
F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski From Form Factors to GPDs Ju v = 0.230+0.009 0.024 Jd v = 0.004+0.010 0.016 Ju v = 0.214+0.009 0.013 Jd v = 0.029+0.021 0.008 Bacchetta, Radici Ji sum rule: Compatible with (model-dependent) extraction from TMDs: R = GE/(GM /袖) 18 H, E
F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski Constraining GPDs 19 , , , DVCS () Vector mesons (, , ) Pseudoscalar mesons (, ) ! H, E, H, E ! H, E ! H, E 0
F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski Constraining GPDs 20 DVCS () Vector mesons (, , ) Pseudoscalar mesons (, ) ! H, E, H, E ! H, E ! H, E LO q NLO g+q NLO BUT!!! , , ,
F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski but.... evolution sensitive to the prescription! TMD evolution 21
F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski Transversity and Collins extraction: TMD transversity 22 H? 1h1 AUT /
F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski Collinear transversity 23 Flavor separation! AUT /z1, z1, m2 1, m2 2) 1 2 sin2 慮 1 + cos2 慮 錚 錚 q,q e2 q z2 1z2 2 H<) q 1 (z1, m 錚 錚 q,q e2 q z2 1 z2 2 Dq 1(z1, m2 1) Dq 1(z2, m or the cos(1 + 2) modulation rference fragmentation function charge eq) , and its polarization- q fere strongly in the the meson resona the IFF. h1
F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski Additional TMDs ... 24 Ongoing studies on TMDs universality: universality broken in a calculable way for some TMDs
F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski pp AN AN sensitive to 鍖nal state de鍖nition! 25
F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski Outlook 26 More measurements in progress Several upgrade and new experiments planned
F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski Outlook 27 More measurements in progress Several upgrade and new experiments planned THANKS to all the speakers!

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Dis2013 spin highlights

  • 1. DIS2013, April 22-26, 2013, Marseille, France Francesca Giordano (UIUC), Alessandro Bacchetta (Uni Pavia, INFN) Marco Contalbrigo (INFN) Marcin Stolarski (LIP) HIGHLIGHTS FROM SPIN PHYSICS 1
  • 2. F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski The proton structure 2 GPDs (x, bT) TMDs (x, kT) x zy kT S xp xz y xp bT
  • 3. F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski The proton structure 3 GPDs (x, bT) TMDs (x, kT) x zy kT S xp xz y xp bT PDFs (x) TMDs(x,kT) ... dkT GPDs(x,bT) ... dbT
  • 4. F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski The proton structure 4 GPDs (x, bT) TMDs (x, kT) x zy kT S xp xz y xp bT PDFs (x) TMDs(x,kT) ... dkT GPDs(x,bT) ... dbT Form Factors (t) Fourier transform (bT) & GPDs(x, t) ... dx
  • 5. F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski Spin puzzle 5 1 2 = 1 2 + Lq + G + Lg 1 2 G Lq Lg
  • 6. F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski6 X Dq h h X Dq h h e- X Dq h h e- e+ Complementary reactions: Global analyses needed! Evolution Factorization Universality Spin puzzle e-
  • 7. F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski7 X Dq h h X Dq h h e- X Dq h h e- e+ Complementary reactions: Global analyses needed! Evolution Factorization Universality Spin puzzle
  • 8. F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski DIS 2013: spin session 8 Gevorg KARYAN Nour MAKKE Charlotte VAN HULSE Harold E JACKSON Jr Isabella GARZIA Unpolarized Hoyoung KANG Vincent ANDRIEUX Alberto ACCARDI Sanghwa PARK Bernd SURROW Emanuele Roberto NOCERA Quark Helicity Gluon Helicity Mickey CHIU Carl GAGLIARDI Luis SILVA Grant WEBB Murad SARSOUR Stephen GLISKE GPDs Sergey YASCHENKO Marat SIDDIKOV Jakub WAGNER Samuel WALLON Bohdan MARIANSKI Katharina SCHMIDT Isabella GARZIA Mher AGHASYAN Anna MARTIN Bakur PARSAMYAN Christopher BRAUN Stephen GLISKE Markus DIEHL Alexei PROKUDIN Maarten BUFFING Ignazio SCIMENI Wilco DEN DUNNEN Kazuhiro TANAKA Fabio DOMINGUEZ Koichi KANAZAWA Stefano MELIS Aurore COURTOY Zhun LU TMD theory TMD exp TMD phenomenology Jacques SOFFER Stefano MELIS Steven HEPPELMANN Oleg EYSER pp AN 18 27 Experiment Theory
  • 9. F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski 6 7 20 12Long. spin TMDs GPDs Other DIS 2013: spin session 9 18 27 Experiment Theory
  • 10. F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski Isabella Garzia DIS-2013 Test of Hadronization Models Default parameters used: (based on previous data: higher energies plus ARGUS data) Large discrepancies in general - all the models qualitatively describe the bulk of the spectra - no model describes any spectrum in detail Peak positions consistent with data (except for the HERWIG K賊) Similar discrepancies observed at higher energies - often of the same sign - the models do a reasonable job of describing the scaling properties? 11 Preliminary 0.5% precision data! 21 Comparison to world data High-precision unpolarized data 10
  • 11. F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski 23 April, DIS 2013 Hadron multiplicities at HERMES, Gevorg Kar Rea betwe for po pions Sub betwe for ne kaon LO c Mh ( hermes Charged+pion+mul)plici)es+vs+(x,y,z)+ DIS$2013,$Marseille,$April$22326$$N.$Makke$ 0 2 0 2 M(z) 0 1 0 2 0.5 1 0 2 0.5 1 0 2 0 0.5 0.5 1 0 1 0.5 1 0 2 0.5 1 0 2 0.5 1 0 2 0.5 1 0 0.5 0.5 1 0 1 0.5 1 0 2 0.5 1 0 2 0.5 1 0 2 0.5 1 0 0.5 0.5 1 0 1 0.5 1 0 2 0.5 1 0 2 0.5 1 0 2 0.5 1 0 0.5 0.5 1 0 1 0.5 1 0 2 0.5 1 0 2 0.5 1 0 2 0.5 1 0 1 0.5 1 0 2 0.5 1 0 2 0.5 1 0 2 + 0.5 1 0 2 0.5 1 0 2 z 0.5 1 0.5 1 0 2 0.5 1 0 2 0.5 1 x y COMPASS Preliminary 0.004 0.01 0.02 0.03 0.04 0.06 0.10 0.15 0.70 0.10 0.15 0.20 0.30 0.50 0.70 ew+ SIDIS: essential for 鍖avor separation 11 High-precision unpolarized data
  • 12. F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski 14 Including all corrections: JAM Higher twist contributions are manifestly important for current DIS data Considerable improvement of for JLab and some SLAC data sets (globally , ) Relevant for both and Progress in helicity extractions Important corrections at high x The JAM collaboration www.jlab.org/jam Parallel effort to our unpolarized PDFs: CJ and JR 12
  • 13. F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski Strange helicity puzzle Including SIDIS inclusive DIS only Better knowledge of Fragmentation Functions is needed for SIDIS 13
  • 14. F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski Sea helicity 14 Measured asymmetries (Run 9) are in agreement with theory evaluations using polarized pdfs (DSSV) constrained by polarized DIS data Universality of helicity distr. functions! e侶 2 1 0 1 2 0.6 0.4 0.2 0 0.2 0.4 0.6 LA W+ W~p + p ! W賊 + X ! e賊 + X 25 < Ee T < 50 GeV RHICBOS DNS K DNS KKP DSSV08 CHE DSSV08 W W+ e侶 2 1 0 1 2 0.6 0.4 0.2 0 0.2 0.4 0.6 LA W+ W~p + p ! W賊 + X ! e賊 + X 25 < Ee T < 50 GeV RHICBOS DNS K DNS KKP DSSV08 CHE DSSV08 W W+ DSSV08 LO with 2 = 1 pdf error onal Workshop on DIS and Related Subjects - DIS2013 ance, April 22-26, 2013 Bernd Surrow 17 AR W AL results / projections Critical: Measurement of W+ and W- asymmetries as a function 侶e Major step forward in Run 12: Large AL (W- ) asymmetry above DSSV suggests large anti-u quark polarization Extension of backward / forward 侶e acceptance enhances sensitivity to anti-u / anti-d quark polarization STAR Forward GEM Tracker (1<|侶e|<2) e侶 2 1 0 1 2 0.6 0.4 0.2 0 0.2 0.4 0.6 LA W+ W~p + p ! W賊 + X ! e賊 + X 25 < Ee T < 50 GeV RHICBOS DNS K DNS KKP DSSV08 CHE DSSV08 W W+ DSSV08 LO with 2 = 1 pdf error Run 9 sys. error || < 1.5 L = 250 pb 1 1.5 < || < 2.0 L = 165 pb 1 P = 55% 5% sys. error beam pol. STAR Run 12 + Run 13 Projections p s = 500 GeV At the end of the RHIC W program we expect a signi鍖cant improvement in the light sea helicity knowledge: DSSV Still collecting data!
  • 15. F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski Gluon is not constrained by inclusive DIS in collaboration with R.D. Ball, S. Forte, A. Guanti, G. Ridol鍖 and J. Rojo Universit`a degli studi di Milano & INFN, sezione di Milano Parc Chanot Marseille - April, 23 2013 Emanuele R. Nocera (UNIMI) NNPDFpol1.0 April 2013 1 / 21 15 Gluon helicity
  • 16. F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski Gluon helicity 16 -0.1 0 0.1 0.2 10 -2 10 -1 DSSV DSSV++ Q 2 = 10 GeV 2 x g x RHIC 200 GeVSilva 23 Apr 2013(lsilva@lip.pt) 15/16 G Results: LO and NLO D 87, 052018 (2013) syst) xg = 0.110.05 +0.11 , 2 = 13 GeV/c2 (syst) xg = 0.200.08 +0.13 , 亮2 = 13 (GeV/c)2 Carl Gagliardi DIS2013 Gluon Polarization and Jet Production in STAR 11 ALL for inclusive jets: 2006 to 2009 2009 STAR inclusive jet ALL measurements are a factor of 3 (high-pT) to >4 (low-pT) more precise than 2006 Results fall between predictions from DSSV and GRSV-STD Precision sufficient to merit finer binning in pseudorapidity STARSTAR Including part of the Phenix and Star data
  • 17. F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski From Form Factors to GPDs Ju v = 0.230+0.009 0.024 Jd v = 0.004+0.010 0.016 Ji sum rule: R = GE/(GM /袖) 17 H, E
  • 18. F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski From Form Factors to GPDs Ju v = 0.230+0.009 0.024 Jd v = 0.004+0.010 0.016 Ju v = 0.214+0.009 0.013 Jd v = 0.029+0.021 0.008 Bacchetta, Radici Ji sum rule: Compatible with (model-dependent) extraction from TMDs: R = GE/(GM /袖) 18 H, E
  • 19. F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski Constraining GPDs 19 , , , DVCS () Vector mesons (, , ) Pseudoscalar mesons (, ) ! H, E, H, E ! H, E ! H, E 0
  • 20. F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski Constraining GPDs 20 DVCS () Vector mesons (, , ) Pseudoscalar mesons (, ) ! H, E, H, E ! H, E ! H, E LO q NLO g+q NLO BUT!!! , , ,
  • 21. F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski but.... evolution sensitive to the prescription! TMD evolution 21
  • 22. F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski Transversity and Collins extraction: TMD transversity 22 H? 1h1 AUT /
  • 23. F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski Collinear transversity 23 Flavor separation! AUT /z1, z1, m2 1, m2 2) 1 2 sin2 慮 1 + cos2 慮 錚 錚 q,q e2 q z2 1z2 2 H<) q 1 (z1, m 錚 錚 q,q e2 q z2 1 z2 2 Dq 1(z1, m2 1) Dq 1(z2, m or the cos(1 + 2) modulation rference fragmentation function charge eq) , and its polarization- q fere strongly in the the meson resona the IFF. h1
  • 24. F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski Additional TMDs ... 24 Ongoing studies on TMDs universality: universality broken in a calculable way for some TMDs
  • 25. F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski pp AN AN sensitive to 鍖nal state de鍖nition! 25
  • 26. F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski Outlook 26 More measurements in progress Several upgrade and new experiments planned
  • 27. F. Giordano, A. Bacchetta, M. Contalbrigo, M. Stolarski Outlook 27 More measurements in progress Several upgrade and new experiments planned THANKS to all the speakers!