Department of Physics, University of Connecticut August 25th 2014

Transcription

1 Department of Physics, University of Connecticut August 5th 014 LHeC - Low x Kinematics Q /GeV e The Large Hadron electron Collider at 1 CERN -1 Néstor Armesto Departamento de Física de Partículas and IGFAE Universidade de Santiago de Compostela nestor.armesto@usc.es x for the LHeC Study group, 1

2 Contents: I. Introduction.. The machine: Accelerator. Detector. LHC vs. LHeC. 3. The physics case: Precision EW. Higgs. BSM. Precision QCD. Small x. CDR, arxiv: , J. Phys. G 39 (01) ; arxiv: ; arxiv:111.5; cern.ch/lhec; LHeC workshop January 0th-1st CERN Courier /files/CERN%0Courier%0June %0014.pdf 4. Summary and outlook. LHeC@CERN. N. Armesto,

3 Contents: I. Introduction.. The machine: Accelerator. Detector. LHC vs. LHeC. 3. The physics case: Precision EW. Higgs. BSM. Precision QCD. Small x. 4. Summary and outlook. CDR, arxiv: , J. Phys. G 39 (01) ; arxiv: ; arxiv:111.5; cern.ch/lhec; LHeC workshop January 0th-1st CERN Courier /files/CERN%0Courier%0June %0014.pdf Disclaimer: I will be biased towards QCD aspects. N. Armesto,

4 Motivation: Complementarity of the three kind of collisions for our understanding of the interaction of matter: 1. Introduction. N. Armesto,

5 Motivation: Complementarity of the three kind of collisions for our understanding of the interaction of matter: LHeC@CERN: 1. Introduction. N. Armesto,

6 Messages from HERA: Very good description of F(c,b) (FL?)within DGLAP, steep gluon in 1/x. Large fraction of diffraction σdiff/σtot % (Cooper-Sarkar, ). LHeC@CERN: 1. Introduction. N. Armesto,

7 PDFs: HERA: successful but unfinished QCD program - ea, ed, high and small x, new concepts (TMDs,...), instantons, odderon,... LHeC@CERN: 1. Introduction. N. Armesto,

8 PDFs: HERA: successful but unfinished QCD program - ea, ed, high and small x, new concepts (TMDs,...), instantons, odderon,... LHC is sensitive to differences in pre-lhc PDFs!!! New set of PDFs including LHC data is coming. [pb] Z dσ/d y Theory/Data ATLAS -1 L dt = pb Data 0 ( MSTW08 HERAPDF1.5 ABKM09 JR09 s = 7 TeV) + - Z l l Uncorr. uncertainty Total uncertainty y Z LHeC@CERN: 1. Introduction. N. Armesto,

9 npdfs: Lack of data models give vastly different results for the nuclear glues at small scales and x: problem for benchmarking in HIC. Yellow Report on Hard Probes, R Pb u v (x,1.69 GeV ) R Pb u (x,1.69 GeV ) R Pb g (x,1.69 GeV ) Available DGLAP analysis at NLO show large uncertainties at small scales and x R -5 EPS09 nds HKN07 Pb u v (x,0 GeV EPS09 nds HKN ) - DSSZ FGS (Q =4 GeV ) -1 1 x DSSZ FGS -1 1 x NLO analysis x R Pb u -5 (x,0 GeV -4-3 ) x R -5 Pb g (x,0 GeV -3 - ) x -1 1 x LHeC@CERN: 1. Introduction. N. Armesto,

10 npdfs: Lack of data models give vastly different results for the nuclear glues at small scales and x: problem for benchmarking in HIC. Yellow Report on Hard Probes, R Pb u v (x,1.69 GeV ) R Pb u (x,1.69 GeV ) R Pb g (x,1.69 GeV ) Available DGLAP analysis at NLO show large uncertainties at small scales and x R -5 EPS09 nds HKN07 Pb u v (x,0 GeV EPS09 nds HKN ) DSSZ FGS (Q =4 GeV ) -1 1 x DSSZ FGS Inclusive 0 J/ψ x NLO analysis x R Pb u (x,0 GeV -3 ) x (x,0 GeV LHeC@CERN: 1. Introduction. N. Armesto, R Pb g -3 - ) x -1 1 x 6

11 Relevance for the HI program: 1. Introduction. N. Armesto,

12 Relevance for the HI program: Nuclear wave function at small x: nuclear structure functions. 1. Introduction. N. Armesto,

13 Relevance for the HI program: Nuclear wave Particle production at the very beginning: which factorisation in ea? function at small x: How does the system nuclear behave as isotropised structure so fast?: initial conditions functions. for plasma formation to be studied in ea. 1. Introduction. N. Armesto,

14 Relevance for the HI program: Nuclear wave function at small x: nuclear structure functions. 1. Introduction. Particle production at the very beginning: which factorisation in ea? How does the system behave as isotropised so fast?: initial conditions for plasma formation to be studied in ea. Probing the medium through energetic particles (jet quenching etc.): modification of QCD radiation and hadronization in the nuclear medium. N. Armesto,

15 The QCD phase diagram: Our aims: understanding xg A (x, Q s) R A Q s 1 = Q s A 1/3 x 0.3 The implications of unitarity in a QFT. The behavior of QCD at large energies. The hadron wave function at small x. Origin in the early 80 s: GLR, Mueller et al, McLerran-Venugopalan. The initial conditions for the creation of a dense medium in heavy-ion collisions. LHeC@CERN: 1. Introduction. N. Armesto,

16 The QCD phase diagram: Our aims: understanding xg A (x, Q s) R A Q s 1 = Q s A 1/3 x 0.3 Origin in the early 80 s: GLR, Mueller et al, McLerran-Venugopalan. LHeC@CERN: 1. Introduction. The implications of unitarity in a QFT. Questions: The behavior of QCD at large energies. Theory: ca described us The hadron wave non-perturb function at small x. Phenomen The initial conditions do present for e the creation of a dense medium in heavy-ion collisions. N. Armesto,

17 Status of small-x physics: Three pqcd-based alternatives to describe small-x ep and ea data: DGLAP evolution (fixed order PT). Resummation schemes. CGC (dipole models and rcbk). Differences lie at moderate Q (>Λ QCD) and small x. Hints of deviations from NLO DGLAP at small x (Caola et al 09, Albacete et al 1). Unitarity (non-linear effects): where? ln 1/x non-perturbative region ln Λ QCD BK/JIMWLK BFKL DENSE REGION DGLAP saturation scale Q s (x) DILUTE REGION ln Q Two-pronged approach: x / A. ea: test/ enhance density effects. ln 1/x ep DILUTE REGION ea [fixed Q] DENSE REGION ln A LHeC@CERN: 1. Introduction. N. Armesto,

18 Status of Higgs: ATLAS-CONF Introduction. N. Armesto,

19 Prospects of Higgs: Studies for HL-LHC show that PDF+scale uncertainties are the limiting factors for several channels: LHeC for full exploitation of the HL-LHC. Dashed regions: scale+pdf uncertainty 1. Introduction. N. Armesto,

20 Contents: I. Introduction.. The machine: Accelerator. Detector. LHC vs. LHeC. 3. The physics case: Precision EW. Higgs. BSM. Precision QCD. Small x. 4. Summary and outlook. N. Armesto,

21 Project: ep/ea experiment using p/a from the LHC: Ep=7 TeV, EA=(Z/A)Ep=.75 TeV/nucleon for Pb. New e + /e - accelerator: Ecm 1- TeV/nucleon (Ee= GeV). Requirements: * Luminosity 33 cm - s -1. * Acceptance: degrees (low-x ep/ea). * Tracking to 0.1 mrad. * EMCAL calibration to 0.l %. * HCAL calibration to 0.5 %. * Luminosity determination to 1 %. * Power < 0 MW. * Compatible with synchronous LHC/HL-LHC operation. ) (GeV Q 6 nuclear DIS - F ),A (x,q Proposed facilities: -6 LHeC Fixed-target data: Q s perturbative NMC E77 E139 E665 EMC (Pb, b=0 fm) non-perturbative e-pb (LHeC) (70 GeV -.5 TeV) - -1 x LHeC@CERN:. The machine. N. Armesto,

22 Project: ep/ea experiment using p/a from the LHC: Ep=7 Requirements TeV, EA=(Z/A)Ep=.75 LHeC TeV/nucleon HERA for Pb. How? New e + /e - accelerator: Ecm 1- TeV/nucleon (Ee= GeV). high lumi for high x Requirements: and Q ^ ER technique 6 nuclear DIS - F (x,q ),A * Luminosity 33 cm - s -1. * Acceptance: degrees (low-x ep/ea). * Tracking to 0.1 mrad. * EMCAL calibration to 0.l %. * HCAL calibration to 0.5 %. * Luminosity determination to 1 %. * Power < 0 MW. * Compatible with synchronous LHC/HL-LHC operation. ) (GeV Q E139 tracking 0.1 mrad 0.-1 mrad modern Si 3 E665 e-pb (LHeC) EMC (70 GeV -.5 TeV) Hcal tracking + calo e/h accurate lumi/pol demanding Proposed facilities: 5 LHeC large acceptance deg deg. kinematic coverage Fixed-target data: Q s perturbative NMC E77 EMcal (Pb, b=0 fm) non-perturbative kinematic reconstruction x LHeC@CERN:. The machine. N. Armesto,

23 Power constraints and design RR option considerations: CDR numbers LR option The machine. N. Armesto,

24 Machine: Linac-Ring option Loss compensation (90m) Loss compensation 1 (140m) Linac 1 (08m) Injector Matching/splitter (31m) Matching/combiner (31m) Arc 1,3,5 (314m) Arc,4,6 (314m) Bypass (30m) Linac (08m) Matching/combiner (31m) IP line Matching/splitter (30m) Detector LHeC@CERN:. The machine. N. Armesto,

25 Machine: Linac-Ring option Loss compensation (90m) Loss compensation 1 (140m) Linac 1 (08m) Injector Matching/splitter (31m) Matching/combiner (31m) Arc 1,3,5 (314m) Arc,4,6 (314m) Bypass (30m) Linac (08m) Matching/combiner (31m) IP line Matching/splitter (30m) Detector LHeC@CERN:. The machine. N. Armesto,

26 Machine: Linac-Ring option Loss compensation (90m) Loss compensation 1 (140m) e Linac 1 (08m) Injector Matching/splitter (31m) Matching/combiner (31m) Arc 1,3,5 (314m) Arc,4,6 (314m) Bypass (30m) Linac (08m) Matching/combiner (31m) IP line Matching/splitter (30m) Detector LHeC@CERN:. The machine. N. Armesto,

27 Machine: Linac-Ring option Post CDR CDR The machine. N. Armesto,

28 FCC-he: The machine. N. Armesto,

29 The detector: RR, high acceptance e p LHeC@CERN:. The machine. N. Armesto,

30 The detector: RR, high acceptance e p LHeC@CERN:. The machine. N. Armesto,

31 The detector: RR, high acceptance Other detector options: low acceptance (8 o -17 o ), solenoid outside, also considered. Plus luminosity detector, electron tagging, polarimeter, ZDC and leading proton detector. e p LHeC@CERN:. The machine. N. Armesto,

32 The detector for FCC-he: The machine. N. Armesto,

33 Kinematics: Small-x demands 1 degree acceptance. Higher luminosity would benefit high-x and Q studies. LHeC@CERN:. The machine 0

34 Kinematics: Small-x demands 1 degree acceptance. Higher luminosity would benefit high-x and Q studies. LHeC@CERN:. The machine 0

35 LHC vs. LHeC: ) (GeV p+pb LHC (7 TeV+.75 TeV) Present nuclear DIS and Drell-Yan in p+a ppb@lhc pp@lhc y lab = y lab = 0 epb@lhec Q 3 y lab = 4 Q sat,pb (x) y lab = 6 Present DIS+DY x A ) (GeV Q 5 Ultra-peripheral QQ: 4 3 LHC Υ ( y <.5) LHC J/Ψ ( y <.5) Nuclear DIS & DY data: NMC (DIS) SLAC-E139 (DIS) FNAL-E665 (DIS) EMC (DIS) FNAL-E77 (DY) PbPb@LHC 1 Q s (Pb, b=0 fm) perturbative non-perturbative LHeC@CERN:. The machine -1 1 x 1

36 LHC vs. LHeC: 8 ) (GeV p+pb LHC (7 TeV+.75 TeV) Present nuclear DIS and Drell-Yan in p+a ppb@lhc y lab = y lab = 0 epb@lhec Q 3 y lab = 4 Q sat,pb (x) y lab = 6 Present DIS+DY x A ) (GeV Q 5 Ultra-peripheral QQ: 4 3 LHC Υ ( y <.5) LHC J/Ψ ( y <.5) Nuclear DIS & DY data: NMC (DIS) SLAC-E139 (DIS) FNAL-E665 (DIS) EMC (DIS) FNAL-E77 (DY) PbPb@LHC 1 Q s (Pb, b=0 fm) perturbative non-perturbative LHeC@CERN:. The machine -1 1 x 1

37 LHC vs. LHeC: 8 ) (GeV p+pb LHC (7 TeV+.75 TeV) Present nuclear DIS and Drell-Yan in p+a ppb@lhc y lab = y lab = 0 epb@lhec Q 3 y lab = 4 Q sat,pb (x) y lab = 6 Present DIS+DY x A ) (GeV Q 5 Ultra-peripheral QQ: LHC Υ ( y <.5) LHC J/Ψ ( y <.5) Q s (Pb, b=0 fm) perturbative non-perturbative Nuclear DIS & DY data: NMC (DIS) SLAC-E139 (DIS) FNAL-E665 (DIS) EMC (DIS) FNAL-E77 (DY) PbPb@LHC The LHeC will explore a region overlapping with the LHC: in a cleaner experimental setup; on firmer theoretical grounds LHeC@CERN:. The machine -1 1 x 1

38 Contents: I. Introduction.. The machine: Accelerator. Detector. LHC vs. LHeC. 3. The physics case: Precision EW. Higgs. BSM. Precision QCD. Small x. 4. Summary and outlook. N. Armesto,

39 Contents: I. Introduction.. The machine: Accelerator. Detector. LHC vs. LHeC. 3. The physics case: Precision EW. Higgs. BSM. Precision QCD. Small x. 4. Summary and outlook. Disclaimer: I will be biased towards QCD aspects, and present only a selection. N. Armesto,

40 1four1momentum'transfer'squared Physics'and'Range' '' Nuclear Structure High Density Matter QGPlasma Physics goals: High Precision QCD & El.weak Physics RPV SUSY, LQ Substructure? Higgs Boson Large x Gluon Bjorken co'mk' Proton structure to a few -0 m: Q lever arm. Precision QCD/EW physics. High-mass frontier (leptoquarks, excited fermions, contact interactions). Unambiguous access, in ep and ea, to a qualitatively novel regime of matter predicted by QCD. Substructure/parton dynamics inside nuclei with strong implications on QGP search. LHeC@CERN: 3. The physics case. N. Armesto,

41 EW processes: High statistics CC will allow to explore the A and V quark couplings and to determine sin θw over a large range in Q. sin θw LHeC@CERN: 3. The physics case. N. Armesto,

42 Higgs (I): PDF and αs determination at the LHeC/FCC-he will reduce the uncertainty in Higgs cross section to 0.4 %: clear sensitivity to Higgs mass. 3. The physics case. N. Armesto,

43 Higgs (II): Unique access to WWH and ZZH couplings. σ ~ that at ILC, ~ than at LHC but cleaner environment: even HH. H bbbar LHeC@CERN: 3. The physics case. N. Armesto,

44 BSM (I): PDF determination improves substantially the possibilities for searches at the HL-LHC. 3. The physics case. N. Armesto,

45 BSM (II): Nice possibilities for LQs and for anomalous Wtb couplings. 3. The physics case. N. Armesto,

46 BSM (II): Nice possibilities for LQs and for anomalous Wtb couplings. 3. The physics case. N. Armesto,

47 Parton densities: HERAPDF-like, GM VFNS Valence quarks 3. The physics case. N. Armesto,

48 Parton densities: HERAPDF-like, GM VFNS Gluon Valence quarks uncertainty on d/u (relaxed low x assumptions in the fit) Q = 4 GeV H1 + BCDMS 0.4 LHeC ep 0. LHeC ep+ed x LHeC@CERN: 3. The physics case. N. Armesto,

49 Parton densities: HERAPDF-like, GM VFNS Gluon Valence quarks Large improvement in proton and neutron PDFs, both at small and at large x. uncertainty on d/u (relaxed low x assumptions in the fit) Q = 4 GeV H1 + BCDMS LHeC ep LHeC ep+ed x LHeC@CERN: 3. The physics case. N. Armesto,

50 Coupling constant: DIS extractions of αs Open issues on mc, scales, order of perturbation th., The physics case. N. Armesto,

51 Coupling constant: DIS extractions of αs Substantial improvement in the less known coupling constant, combination with jets still pending. Open issues on mc, scales, order of perturbation th., The physics case. N. Armesto,

52 Heavy flavors: Total cross sections in ep collisions σ (pb) 6 Charm γp Charm DIS Beauty γp Beauty DIS CC e-p CC e+p sw c sw c bw t bw t Events per fb tt γp tt DIS LHeC HERA E e (GeV) Compared to HERA: higher lumi plus better efficiencies. LHeC@CERN: 3. The physics case. N. Armesto,

53 Heavy flavors: anti-strange density [3 j ] LHeC e - p 60*7000 GeV fb -1 x= σ (pb) x= x= x= Charm γp x=0.001 Total cross sections in ep collisions x=0.005 Charm DIS x= x=0.005 Beauty γp Beauty DIS CC e-p CC e+p sw c sw c bw t bw t x=0.01 x=0.01 x=0.018 x=0.05 x=0.040 x=0.055 x= ε c =0.1, bgd q =0.01 Q /GeV Events per fb tt γp tt DIS LHeC HERA E e (GeV) Compared to HERA: higher lumi plus better efficiencies. LHeC@CERN: 3. The physics case. N. Armesto,

54 anti-strange density [3 j ] LHeC e - p 60*7000 GeV fb -1 x= σ (pb) x= x= x= Charm γp x=0.001 Total cross sections in ep collisions x=0.005 Charm DIS x= Beauty γp Beauty DIS CC e-p CC e+p sw c sw c bw t bw t Heavy flavors: x=0.005 x=0.01 x=0.01 x=0.018 x=0.05 x=0.040 x=0.055 For the x=0.08 first time, full flavour ε Q /GeV c =0.1, bgd q =0.01 decomposition in a single setup Events per fb tt γp tt DIS LHeC HERA E e (GeV) Compared to HERA: higher lumi plus better efficiencies. LHeC@CERN: 3. The physics case. N. Armesto,

55 ep inclusive: small x Tension between F and FL in DGLAP fits as a sign of physics beyond standard DGLAP (GBW and CGC models). LHeC@CERN: 3. The physics case. N. Armesto,

56 ep inclusive: small x F L p (x,q ) Pseudo-data from AAMS09 (BK + running coupling) LHeC AAMS09 NNPDF fit Tension between F and Pseudo-data from AAMS09 (BK + running coupling) FL in DGLAP fits as a sign of physics beyond standard DGLAP (GBW and CGC models). LHeC AAMS09 NNPDF fit 0.1 Q =13.5 GeV 0 1e x 0.1 Q =30 GeV 0 1e x LHeC AAMS09 NNPDF fit LHeC AAMS09 NNPDF fit F L p (x,q ) Q = GeV 0 1e-06 1e x Q =5 GeV 0 1e-06 1e x LHeC@CERN: 3. The physics case. N. Armesto,

57 ea inclusive: comparison Good precision can be obtained for F(c,b) and FL at small x. 1. R Pb F L (x,5 GeV ) EPS09 nds HKN07 FGS AKST Data: LHeC x -1 Fc Pb Fb Pb LHeC@CERN: 3. The physics case. N. Armesto,

58 ea inclusive: constraining PDFs 3. The physics case. N. Armesto,

59 ep diffractive: e Large increase in the M, xp=(m -t Events 8 7 Diffractive event yield (x IP < 0.05, Q > 1 GeV ) LHeC (E e = 50 GeV, fb -1 ) HERA (500 pb -1 ) +Q )/(W +Q ), β=x/ 6 xp region studied. 5 Possibility to combine LRG and LPS M X / GeV LHeC@CERN: 3. The physics case. N. Armesto,

60 Diffraction in ep and shadowing: e Diffraction is linked to nuclear shadowing through basic QFT (Gribov): ed to test and set the benchmark for new effects. LHeC@CERN: 3. The physics case. N. Armesto,

61 Diffraction in ep and shadowing: e Diffraction is linked to nuclear shadowing through basic QFT (Gribov): ed to test and set the benchmark for new effects. LHeC@CERN: 3. The physics case. N. Armesto,

62 Elastic VM production in ep: Elastic J/ψ production appears as a candidate to signal saturation effects at work!!! γ Linear, sensitivity to (xg). 1 z (1 z) r r E z x x b p p Non-linear, saturation. LHeC@CERN: 3. The physics case. N. Armesto,

63 Elastic VM production in ep: 4 γ +p J/ψ +p Elastic J/ψ production appears as a candidate to signal saturation effects at work!!! σ(nb) γ Linear, 1 z sensitivity to (xg). 3 1 z r (1 z) r x x H1 data (005) H1 data (013) ZEUS (00) E516, E401, E687 LHeC Simulation LHCb (014) ALICE p p b E W γp [GeV] CGC (IP-Sat, b-cgc) MNRT (LO) MNRT (NLO) Non-linear, saturation. LHeC@CERN: 3. The physics case. N. Armesto,

64 Elastic VM production in ea: For the coherent case, predictions available. coherent 1/A dσ/dt (µb/gev ).5 γ * A J/Ψ A Saturation effects 1.5 Challenging experimental problem (neutron tagging in ZDC?). 1 incoherent W (GeV) LHeC@CERN: 3. The physics case. N. Armesto,

65 Transverse scan: elastic VM t-differential measurements give a gluon tranverse mapping of the hadron/nucleus. LHeC@CERN: 3. The physics case. N. Armesto,

66 Transverse scan: elastic VM t-differential measurements give a gluon tranverse mapping of the hadron/nucleus. Large extent in t with good precision. Sizable saturation effects expected (also in ep, ). LHeC@CERN: 3. The physics case. N. Armesto,

67 DVCS: Exclusive processes like γ*+h ρ,ϕ,γ+h give information of q and g GPDs, whose Fourier transform gives a tranverse scanning of the hadron: key importance for both non-perturbative and perturbative aspects, like the possibility of non-linear dynamics. Only small-x case where higher luminosity really helps!!! DVCS, Ee=50 GeV, 1 o, DVCS, Ee=50 GeV, o, pt γ,cut = GeV, 1 fb -1 pt γ,cut =5 GeV, 0 fb -1 ] dx [pb/gev 3 x=4.7e-05 x=1.1e-04 x=.4e-04 x=5.3e-04 x=1.e-03 x=.7e-03 x=6.0e-03 x=1.3e-0 ] dx [pb/gev x=1.3e-04 x=.4e-04 x=4.e-04 x=7.5e-04 x=1.3e-03 x=.4e-03 x=4.e-03 x=7.5e-03 4 σ/dq d σ/dq Q Q 4 d Q [GeV ] Q [GeV ] LHeC@CERN: 3. The physics case. N. Armesto,

68 Dihadron azimuthal decorrelation: ΔΦ=Φ1 Dihadron azimuthal decorrelation: xa<<xp currently discussed at RHIC as suggestive of saturation. At the LHeC it could be studied far from the kinematical limits. Albacete-Marquet pt lead >3 GeV pt ass > GeV zlead=zass=0.3 y=0.7 Q =4 GeV LHeC@CERN: 3. The physics case. N. Armesto,

69 Radiation and hadronization: LHeC: dynamics of QCD radiation and hadronization. Most relevant for particle production off nuclei and for QGP analysis in HIC. Low energy: hadronization inside formation time, (pre-)hadronic absorption,... ratio of FFs A/p High energy: partonic evolution altered in the nuclear medium. z=phadr/pparton hadron rest frame ν=estruck parton 3. The physics case. N. Armesto,

70 Radiation and hadronization: LHeC: dynamics of QCD radiation and hadronization. Most relevant for particle production off nuclei and for QGP analysis in HIC. Low energy: hadronization inside formation time, (pre-)hadronic absorption,... ratio of FFs A/p High energy: partonic evolution altered in the nuclear medium. z=phadr/pparton hadron rest frame ν=estruck parton Fixed-target LHeC 3. The physics case. N. Armesto,

71 Many different physical aspects within reach of a high-energy DIS machine. Summary: Physics'and'Range' RPV SUSY, LQ Substructure? The LHeC/FCC-he would complement the LHC/FCC allowing the full exploitation of its possibilities for Higgs, EW and BSM physics. 1four1momentum'transfer'squared '' Nuclear Structure High Density Matter QGPlasma High Precision QCD & El.weak Physics Higgs Boson Large x Gluon It would be a wonderful machine for QCD. Bjorken co'mk' LHeC@CERN. N. Armesto,

72 Outlook: N. Armesto,

73 CERN designed referees Outlook: ~00 authors, 70 institutes N. Armesto,

74 Outlook: N. Armesto,

75 Outlook: N. Armesto,

76 Outlook: N. Armesto,

77 Outlook: The LHeC cannot be a major CERN flagship programme (cannot accommodate 4 users). It is not in competition with any other project: ILC, FCC, It is a feasible option before the end of the LHC ( years to build it). Next steps for the European Strategy in PP in 017/018: design of SC RF, test facility, detector design, physics case in light of LHC Run findings. Support is essential: we need a larger community, everybody is welcome!!! LHeC@CERN. N. Armesto,

78 Outlook: The LHeC cannot be a major CERN flagship programme (cannot accommodate 4 users). It is not in competition with any other project: ILC, FCC, It is a feasible option before the end of the LHC ( years to build it). Next steps for the European Strategy in PP in 017/018: design of SC RF, test facility, detector design, physics case in light of LHC Run findings. Support is essential: we need a larger community, everybody is welcome!!! Thanks a lot for your attention!!! LHeC@CERN. N. Armesto,