F. Kunne NuPECC MEeting, Strasbourg, March 14, 2014 – 1

Activities in hadronic physics

Fabienne KUNNECEA Saclay IRFU SPhN

France

Nucleon structure: Jlab/Hall A & CLAS, CERN/COMPASS, Fair/PANDA

Vector mesons in nuclear matter: GSI/ Hades

NB - Not covered: Theory

@animea

F. Kunne NuPECC MEeting, Strasbourg, March 14, 2014 – 2

Questions

- How hadrons are formed and interact from QCD degrees of freedom ?

- How does the proton spin originates at the microscopic level ?

- How does confinement manifests itself in the structure of hadrons ?

Lattice QCD calculations

Measuring pertinent spin sum rules

Space and momentum distributions of quarks and gluons- GPDs, Generalized Parton Distributions, DVCS Deep Virtual Compton Scattering- TMDs, Transverse Momentum Dependent distributions. SIDIS or Polarized Drell-Yan. - TDAs

F. Kunne NuPECC MEeting, Strasbourg, March 14, 2014 – 3

Confinement, asymtotic freedom, factorisation

Bound states: hadrons

A unique laboratory for the study of QCD

Degrees of freedom: quarks and gluons

Perturbation theory

à long range, low energy à short range, high energy

The observed states are not the degrees of freedom of the theory, but …… factorization allows us to relate the observed states to the degrees of freedom in some ’’hard’’ processes.

2

@animea @animea

F. Kunne NuPECC MEeting, Strasbourg, March 14, 2014 – 4

Methods -1. Quark and gluon spin distributions - Probe quarks or gluons in nucleon with lepton beams - Measure spin asymmetry : polarized beam and target

Deep inelastic scattering

Photon-gluon fusion: ggqq

quarks gluons

x : nucleon momentum fraction carried by quarkQ2 : 4-momentum transfered (resolution ~ 1/Q)

Dq = q - q quark polarization DS : sum over u, d, s flavours DG

h

• Access quark and gluon spin contribution to the nucleon• Compare to lattice QCD

→ → → ←

F. Kunne NuPECC MEeting, Strasbourg, March 14, 2014 – 5

Methods - 2. Generalized parton distributions

x, x : quark momentum fractiont : transfer to protonH(x,x,t) : Gen. Parton distribution- Theoretical concept: 1996

- First dedicated experiment 2004 JLab (IRFU/SPhN)- One of the major goals of future programmes:JLab 12 GeV, COMPASS, EIC

3D picture of the nucleon

GPD extraction from data

2D Fourier T.

Compare first moments to lattice QCD

For the first time, study correlation between longitudinal quark momentum and quark transverse position in nucleon.

Deep virtual Compton scattering (DVCS)A process which interferes with Bethe-Heitler

Can be studied in the interference regime (Jlab and COMPASS) and at high energy where BH smaller (COMPASS)

F. Kunne NuPECC MEeting, Strasbourg, March 14, 2014 – 6

Actors on two sites: CERN/COMPASS and JLab

International Collaboration , ~220 members

Responsibilities in the collaboration:Co- spokesperson of the collaboration, analysis coordinator, technical coordinator, members of drafting commitees and group leader board

Leadership : Longitudinal Spin program, DVCSAdd. fundings: FP6, FP7, ANR SPLAM,ANR PARTONS, P2I, NSF

International Collaborations, ~200 members

Responsibilities in the collaboration:Spokesperson of expts., member of the steering committee, member of user board

Leadership : DVCS, phenomenologyAdd. fundings: FP6, FP7, ANR,GPD@CLAS12,ANR SPLAM, ANR PARTONS, P2I(O), DOE

COMPASS

CLAS

Hall A

F. Kunne NuPECC MEeting, Strasbourg, March 14, 2014 – 7

Main results from COMPASSInstrumentation- Large MPGD Micromegas- Large drift chambers- ECAL calorimeter monitoring- RICH electronics - Instrum of superconducting magnet

½ = ½ DS + DG + Lq + LgPhysics results nucleon spin

6

Distributions depolarisation des quarks

Distribution depolarisation des gluons

Hybrid (GEM-Micromegas) pixellized

Q2=3 (GeV/c)2

• COMPASS

Quark polarization per flavour Gluon polarization

Some puzzle with Ds (strange quark polarization).DG/G slightly >0 for xg~ 0.1. Full integral not well constrained

- Recoil proton detector- Hybrid (GEM-MM) pixelized

Well measured.

F. Kunne NuPECC MEeting, Strasbourg, March 14, 2014 – 8

COMPASS results cont’dWorld data on spin structure functions g1

proton deuteron

Data at high Q2 and low x + COMPASS NLO QCD fit of world data 0.27< DS < 0.32, in agreement with Lattice QCD,Largest uncertainty comes from functional shapes DS (x) & DG(x)

F. Kunne NuPECC MEeting, Strasbourg, March 14, 2014 – 9

Main results from Jlab experiments

Important resultsScattering on free quarks at low energyPrecise DVCS data in a wide kinematical rangeStudy production mechanism of p°, r et w

Scale invariance

Extensive measurements in a

wide kinamatical range

Instrumentation CLASSuperconducting magnet for active shieldingMonitoring for DVCS calorimeterMicromegas for CLAS12 (next)

Experiments DVCS expts: H, H (spokesperson)meson production expt.(spokesperson)

DVCS magnet DVCS calorimeter

~

Hall A CLAS

F. Kunne NuPECC MEeting, Strasbourg, March 14, 2014 – 10

What’s next? COMPASSMuon and pion beams160 – 200 GeV GeVIntermediate luminosityStudy gluon and sea quarks

Jlab: Hall A and CLAS12Electron beam11GeVHigh luminosityStudy valence quarks

Complementary approach in method and kinematics

A common goal: mapping of 3D nucleon structure

Platform for phenomenology

P A R T O N S(ANR)

F. Kunne NuPECC MEeting, Strasbourg, March 14, 2014 – 11

JLab12 DVCS program - Short & mid term plans

Instrumentation : Micromegas trackersInnovations : Cylindrical MM high transverse field

Start : 2015Duration: 200 days of beamResponsibilities : spokesperson, run group coordinationExpected results: 3D proton picture in valence region

Impact of projected data

CLAS12

CLAS

Accessing GPD HCLAS12- Cylindrical Micromegas

Micromegas tile

IPNO (MG)

F. Kunne NuPECC MEeting, Strasbourg, March 14, 2014 – 12

Instrumentation : Recoil proton detector Hybrid MM-GEM pixelizedInnovations : 4m scintillators st=300ps

Large size hybrid MM-GEM

’= 0.8

COMPASS-II

DVCS : 2012, 2016-2017Polarized Drell-Yan: 2014-2015Responsibilities: leader of DVCS program in COMPASSExpected results: 3D proton picture in sea region

TMDs + strange quark Fragmentation Functions, PDF and spin.

Sea quark transversedistribution

HERA:

gluons

?

Strange quark distribution

COMPASS-II

4m scintillators, st=300ps

COMPASS DVCS and Spin - Short & mid term plans

Hybrid Micromegas-GEM pixel

Recoil proton detector

F. Kunne NuPECC MEeting, Strasbourg, March 14, 2014 – 13

Optimized energy/ detector for electron ion collisions (DOE-BNL-JLab, 500M$, 2025?)

R&D proposal MIT-Temple-Irfu: Central tracker

EIC committee : « well received andfully funded (150 k$) »

French participation : Science case, phenomenology, instrumentationFinancements : FP7, DOE

Long term: some study for future EIC collider

IPNO technical contribution: -6 drift chambers (external tracking plane) -LH2 target

pp at 3.5 GeVDilepton production

Data analysis in NN reactions (dilepton and pion production)

Phenomenological work on D Dalitz decay (DNe+e-)

Possible extension HADES@ FAIR

Preparation of pion beam experiments (2014)

IPNO physics contribution and responsibilities

HADES at GSI (Darmstadt)Study fundamental properties of the strong

interaction:vector meson (ρ,ω) studies in nuclear matter

and elementary collisions Reference for medium effects Selective study of dielectron sources via exclusive

channels Electromagnetic structure of baryons (link with PANDA)

Crucial ingredient for the description: production of ρ meson via baryonic resonances

r

h

p0

Study TL FF in transition D*N+ p medium modif (coupled to baryonic resonaces)

w

PANDA/FAIR in Darmstadt

Challenging project for Hadronic physics at IPN Orsay in the years 2020

p beam1.5-15 GeV/cL =2.1031-2.1032 cm-2s-1

(first beams at the end of the decade)

_

PANDA motivations: bring a novel insight into hadronic physics at the QCD frontier with a hermetic multipurpose detector

The impact of FranceNucleon structure through electromagnetic channels in the Time-Like region

1. p p e+ e- (access to Time-Like Form Factors)2. p p e+ e- p0 , J/ p0 (TDA: pion content of the proton)

-Demonstration of the feasibility of the nucleon

Time-Like Form Factors measurement:• separation of |GE| and |GM| up to 14

(GeV/c)2 • Geff up to 28 (GeV/c)2

• Coordination of the Electromagnetic Processes Working group

-Software development for electron tracking, advanced PID and filtering methods

-Development of phenomenological models and

event generators

PANDA ECAL (~20 000 PbWO4 crystals)

• Strong involvment of IN2P3 in the R&D phase

• Design of the cooling system (-25°C)

• Mechanical design of the calorimeter support structure

• Prototypes building and tests

Prototype 120 crystals

PANDA

Expected precision on R = |GE|/|GM|

• Despite a strong motivation of physicists, in a difficult budget situation, no positive decision about the level of the French investment in PANDA could be taken up to now• Towards a joint French effort in hadronic physics with Jlab and PANDA groups.

IPNO physics contribution

IPNO technical contribution

F. Kunne NuPECC MEeting, Strasbourg, March 14, 2014 – 17

Applications beyond hadron physics

→ 2 given channels are connected to neighbouring strips only once in the detector

Þ Many applications in HEP and beyond, in particular with muon tomography:

Innovative multiplexing pattern based on signal redundancy in MPGDs (patented)

Volcanology Homeland security Mining/Archeology

12

50x50 cm², 1024 strips, 61 channels

→ easily adaptable to the incident flux of particles→ can equip up to ~n²/2 strips with only n electronic channels

→ Proposal for the FET-Open call in H2020

NIM A729 (2013), 888

N. Lesparre S. Quillin

S. Procureur

S.Procureur, IRFU

F. Kunne NuPECC MEeting, Strasbourg, March 14, 2014 – 18

A coherent approach, and a leading role

2012-2014 : Analyses, instrumental developments, data taking GSI2015-2017 : Data taking JLab and COMPASS2017-2018 : Analyses, extraction of GPD, First 3D nucleon imaging via PARTONS platform2018+ : Transverse target at JLab and COMPASSTill 2020 : Preparation for PANDA Till 2025 : Preparation for EIC collider

High responsibilities in the Collaborations, leader of experimental programs, experts in these domains.

Conclusion: an ambitious program