nuclear pdfs at the lhc and beyond
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Nuclear PDFs at the LHC and beyond Carlos A. Salgado Universidade - PowerPoint PPT Presentation

Aug 13, 2023 •44 likes •494 views

Nuclear PDFs at the LHC and beyond Carlos A. Salgado Universidade de Santiago de Compostela Nuclei at the FHC CERN - December - 2013 @CASSalgado @HotLHC Disclaimer Very little time to prepare this talk: Slides mostly taken from other

  1. Nuclear PDFs at the LHC and beyond Carlos A. Salgado Universidade de Santiago de Compostela Nuclei at the FHC CERN - December - 2013 @CASSalgado @HotLHC

  2. Disclaimer Very little time to prepare this talk: Slides mostly taken from other (older) talks and/or stolen from other people [especially Pia Zurita and Hannu Paukkunen - they’ve agreed, so thanks :)] [I hope this is good enough for this first informal meeting] Nuclei at FHC - CERN - Dec 2013 nPDFs etc 2

  3. Kinematical reach in nuclear collisions 8 10 7 10 Present nuclear DIS 6 10 and Drell-Yan in p+A 5 10 ) 2 (GeV 4 10 2 Q 3 10 2 Q (x) 2 10 sat,Pb Present 10 DIS+DY 1 -6 -5 -3 -7 -4 -2 -1 10 10 10 10 10 10 10 1 x A Nuclei at FHC - CERN - Dec 2013 nPDFs etc 3

  4. Kinematical reach in nuclear collisions 8 8 10 10 7 7 10 10 Present nuclear DIS Present nuclear DIS 6 6 10 10 and Drell-Yan in p+A and Drell-Yan in p+A d+Au @ RHIC 5 5 10 10 0 < y < 3.2 ) ) 2 2 (GeV (GeV 4 4 10 10 2 2 Q Q 3 3 10 10 2 2 Q Q (x) (x) 2 2 10 10 sat,Pb sat,Pb Present Present 10 10 DIS+DY DIS+DY 1 1 -6 -6 -5 -5 -3 -3 -7 -7 -4 -4 -2 -2 -1 -1 10 10 10 10 10 10 10 10 10 10 10 10 10 10 1 1 x x A A Nuclei at FHC - CERN - Dec 2013 nPDFs etc 3

  5. Kinematical reach in nuclear collisions 8 8 8 10 10 10 7 7 7 10 10 10 p+Pb @ LHC (7 TeV+2.75 TeV) 2 Present nuclear DIS Present nuclear DIS Present nuclear DIS = 6 6 6 10 10 10 and Drell-Yan in p+A and Drell-Yan in p+A and Drell-Yan in p+A b y a l 0 = d+Au @ RHIC d+Au @ RHIC b y 5 5 5 a 10 10 10 l 0 < y < 3.2 0 < y < 3.2 ) ) ) 4 2 2 2 = (GeV (GeV (GeV b y a 4 4 4 l 10 10 10 2 2 2 Q Q Q 3 3 3 10 10 10 6 = b y a l 2 2 2 Q Q Q (x) (x) (x) 2 2 2 10 10 10 sat,Pb sat,Pb sat,Pb = 6.6 Present Present Present 10 10 10 DIS+DY DIS+DY DIS+DY lab y 1 1 1 -6 -6 -6 -5 -5 -5 -3 -3 -3 -7 -7 -7 -4 -4 -4 -2 -2 -2 -1 -1 -1 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 1 1 1 x x x A A A Nuclei at FHC - CERN - Dec 2013 nPDFs etc 3

  6. Kinematical reach in nuclear collisions 8 8 8 8 10 10 10 10 7 7 7 7 10 10 10 10 p+Pb @ LHC (7 TeV+2.75 TeV) p+Pb @ LHC (7 TeV+2.75 TeV) 2 2 Present nuclear DIS Present nuclear DIS Present nuclear DIS Present nuclear DIS = = 6 6 6 6 10 10 10 10 and Drell-Yan in p+A and Drell-Yan in p+A and Drell-Yan in p+A and Drell-Yan in p+A b b y y a a l l 0 0 = = d+Au @ RHIC d+Au @ RHIC d+Au @ RHIC b b y y 5 5 5 5 a a 10 10 10 10 l l 0 < y < 3.2 0 < y < 3.2 0 < y < 3.2 ) ) ) ) 4 4 2 2 2 2 = = (GeV (GeV (GeV (GeV LHeC b b y y a a 4 4 4 4 l l 10 10 10 10 50(e)+2750(Pb) 2 2 2 2 Q Q Q Q 3 3 3 3 10 10 10 10 6 6 = = b b y y a a l l 2 2 2 2 Q Q Q Q (x) (x) (x) (x) 2 2 2 2 10 10 10 10 sat,Pb sat,Pb sat,Pb sat,Pb = 6.6 = 6.6 Present Present Present Present 10 10 10 10 DIS+DY DIS+DY DIS+DY DIS+DY lab lab y y 1 1 1 1 -6 -6 -6 -6 -5 -5 -5 -5 -3 -3 -3 -3 -7 -7 -7 -7 -4 -4 -4 -4 -2 -2 -2 -2 -1 -1 -1 -1 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 1 1 1 1 x x x x A A A A Nuclei at FHC - CERN - Dec 2013 nPDFs etc 3

  7. Kinematical reach in nuclear collisions 8 8 8 8 10 10 10 10 New regions never explored in HIC 7 7 7 7 10 10 10 10 p+Pb @ LHC (7 TeV+2.75 TeV) p+Pb @ LHC (7 TeV+2.75 TeV) small-x and large-Q 2 2 Present nuclear DIS Present nuclear DIS Present nuclear DIS Present nuclear DIS = = 6 6 6 6 10 10 10 10 and Drell-Yan in p+A and Drell-Yan in p+A and Drell-Yan in p+A and Drell-Yan in p+A b b y y a a l l 0 0 = = d+Au @ RHIC d+Au @ RHIC d+Au @ RHIC b b y y 5 5 5 5 a a 10 10 10 10 l l 0 < y < 3.2 0 < y < 3.2 0 < y < 3.2 ) ) ) ) 4 4 2 2 2 2 = = (GeV (GeV (GeV (GeV LHeC b b y y a a 4 4 4 4 l l 10 10 10 10 50(e)+2750(Pb) 2 2 2 2 Q Q Q Q 3 3 3 3 10 10 10 10 6 6 = = b b y y a a l l 2 2 2 2 Q Q Q Q (x) (x) (x) (x) 2 2 2 2 10 10 10 10 sat,Pb sat,Pb sat,Pb sat,Pb = 6.6 = 6.6 Present Present Present Present 10 10 10 10 DIS+DY DIS+DY DIS+DY DIS+DY lab lab y y 1 1 1 1 -6 -6 -6 -6 -5 -5 -5 -5 -3 -3 -3 -3 -7 -7 -7 -7 -4 -4 -4 -4 -2 -2 -2 -2 -1 -1 -1 -1 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 1 1 1 1 x x x x A A A A Nuclei at FHC - CERN - Dec 2013 nPDFs etc 3

  8. Kinematical reach in nuclear collisions 8 8 8 8 10 10 10 10 Constrain PDFs 7 7 7 7 10 10 10 10 p+Pb @ LHC (7 TeV+2.75 TeV) p+Pb @ LHC (7 TeV+2.75 TeV) 2 2 Present nuclear DIS Present nuclear DIS Present nuclear DIS Present nuclear DIS = = 6 6 6 6 10 10 10 10 and Drell-Yan in p+A and Drell-Yan in p+A and Drell-Yan in p+A and Drell-Yan in p+A b b y y a a l l 0 0 = = d+Au @ RHIC d+Au @ RHIC d+Au @ RHIC b b y y 5 5 5 5 a a 10 10 10 10 l l 0 < y < 3.2 0 < y < 3.2 0 < y < 3.2 ) ) ) ) 4 4 2 2 2 2 = = (GeV (GeV (GeV (GeV LHeC b b y y Check expected a a 4 4 4 4 l l 10 10 10 10 50(e)+2750(Pb) 2 2 2 2 saturated region Q Q Q Q 3 3 3 3 10 10 10 10 6 6 = = b b y y a a l l 2 2 2 2 Q Q Q Q (x) (x) (x) (x) 2 2 2 2 10 10 10 10 sat,Pb sat,Pb sat,Pb sat,Pb = 6.6 = 6.6 Present Present Present Present 10 10 10 10 DIS+DY DIS+DY DIS+DY DIS+DY lab lab y y 1 1 1 1 -6 -6 -6 -6 -5 -5 -5 -5 -3 -3 -3 -3 -7 -7 -7 -7 -4 -4 -4 -4 -2 -2 -2 -2 -1 -1 -1 -1 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 1 1 1 1 x x x x A A A A Nuclei at FHC - CERN - Dec 2013 nPDFs etc 3

  9. Kinematical reach in nuclear collisions 8 8 8 8 10 10 10 10 7 7 7 7 10 10 10 10 p+Pb @ LHC (7 TeV+2.75 TeV) p+Pb @ LHC (7 TeV+2.75 TeV) Assuming 2 2 Present nuclear DIS Present nuclear DIS Present nuclear DIS Present nuclear DIS = = 6 6 6 6 10 10 10 10 50+20 and Drell-Yan in p+A and Drell-Yan in p+A and Drell-Yan in p+A and Drell-Yan in p+A b b y y a a l l 0 0 = = FHC d+Au @ RHIC d+Au @ RHIC d+Au @ RHIC b b y y 5 5 5 5 a a 10 10 10 10 l l 0 < y < 3.2 0 < y < 3.2 0 < y < 3.2 ) ) ) ) 4 4 2 2 2 2 = = (GeV (GeV (GeV (GeV LHeC x FCC ∼ x LHC e − 2 b b y y a a 4 4 4 4 l l 10 10 10 10 50(e)+2750(Pb) 2 2 2 2 Q Q Q Q 3 3 3 3 10 10 10 10 6 6 = = b b y y a a l l 2 2 2 2 Q Q Q Q (x) (x) (x) (x) 2 2 2 2 10 10 10 10 sat,Pb sat,Pb sat,Pb sat,Pb = 6.6 = 6.6 Present Present Present Present 10 10 10 10 DIS+DY DIS+DY DIS+DY DIS+DY lab lab y y 1 1 1 1 -6 -6 -6 -6 -5 -5 -5 -5 -3 -3 -3 -3 -7 -7 -7 -7 -4 -4 -4 -4 -2 -2 -2 -2 -1 -1 -1 -1 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 1 1 1 1 x x x x A A A A Nuclei at FHC - CERN - Dec 2013 nPDFs etc 3

  10. Why proton-nucleus? [To study the structure of a large object make collisions with smaller objects (Rutherford experiment...)] The proton structure is constrained by DIS + other data HERA data of utmost importance Need pA to study the high-energy nuclear structure DIS data is old (90’s) short number and with limited range pA@LHC is the only experimental condition available before an eventual lepton-A collider (LHeC, eRHIC?) Needed as benchmark for the AA program High-density effects (saturation) enhanced in nuclei Nuclei at FHC - CERN - Dec 2013 nPDFs etc 4

  11. nPDFs: global analyses. Status Main goals Check the factorization of nPDFs for hard processes Fix the benchmark for HI hot matter or saturation 8 10 EKS98 [Eskola, Kolhinen, Ruuskanen, Salgado 1998] 7 10 HKM [Hirai, Kumano, Miyama, 2001] Present nuclear DIS 6 10 and Drell-Yan in p+A 5 10 nDS [de Florian, Sassot, 2003] ) 2 (GeV 4 10 2 HKN [Hirai, Kumano, Nagai, 2004; 2007] Q 3 10 2 Q (x) 2 10 sat,Pb EPS08, EPS09 [Eskola, Paukkunen, Salgado, 2008; 2009] Present 10 DIS+DY Also FGS [2004-2010] ; Kovarik et al. [2011] 1 -7 -6 -5 -4 -3 -2 -1 10 10 10 10 10 10 10 1 x A QM, Annecy, May 2011 pA physics potential at the TeV 5

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