uk hadron physics
DESCRIPTION
UK Hadron Physics. D. G. Ireland. Nuclear Physics Landscape. Key Physics Questions. Confinement. Generation of Mass. Nucleon Spin. Which facilities are used?. Edinburgh. Glasgow. MAX-Lab, Lund. Mainz. Jefferson Lab. Jefferson Lab (and 12 GeV Upgrade). New Hall. Add 5 cryomodules. - PowerPoint PPT PresentationTRANSCRIPT
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Jefferson Lab (and 12 GeV Upgrade)
8 January 2014
New Hall
Add arc
Enhanced capabilitiesin existing Halls
Add 5 cryomodules
Add 5 cryomodules
20 cryomodules
20 cryomodules
Upgrade arc magnets and supplies
CHL upgrade
The completion of the 12 GeV Upgrade of CEBAF was ranked the highest priority in the 2007 NSAC Long Range Plan. Scope of the project includes:
• Doubling the accelerator beam energy• New experimental Hall and beamline• Upgrades to existing Experimental
Halls
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JLab - Hall A Upgrade
High Resolution Spectrometers,plus BigBite
plus Super Bigbite Spectrometer (SBS)
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The MAMI Facility
• 100% duty factor electron microtron
• MAMI-C 1.5 GeV upgrade
(MAMI-B 0.85 GeV)
One of the MAMI-C magnets
e
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Reactions
Elastic Scattering
Semi-Inclusive Deep Inelastic Scattering (SIDIS)
Deeply Virtual ComptonScattering (DVCS)
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CLAS results γp→K+Λ → K+pπ-
Bonn-Gatchina Coupled Channel Analysis, A.V. Anisovich et al, EPJ A48, 15 (2012)
(Includes nearly all new photoproduction data)
M. Mc Cracken et al. (CLAS), Phys. Rev. C 81, 025201, 2010 R. Bradford et al. (CLAS), Phys.Rev. C75, 035205, 2007
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Coherent Pion Photoproduction
Angular distribution of p0 → PWIA contains the matter form factor
p0 final state interactions - use latest complex optical potentials tuned to p-A scattering data. Corrections modest at low pion momenta
Photon probe Interaction well understood p0 meson – produced with
~equal probability on protons AND neutrons.
Reconstruct p0
from p0→2 g decay
ds/d (W PWIA) = (s/mN2) A2 (qp*/2kg) F2(Eg
*,qp*)2 |F
m(q)|2 sin2qp
*
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Comparison with previous measurements
0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.50
2
4
6
8
10
12
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Pion scattering
PREX
Drnp
Proton scattering
Antiprotonic atomsHeavy ion diffusionElectric dipolePygmy dipole
}Coherent pion
DropletNstar + QMC
Latimer
Tsang
Analyses using theory, expt, observation.
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Structure Functions
k y
kx
-0.5
0.5
0.0
-0.5 0.0 0.5
bx [fm] Anselmino et al., 2009QCDSF/UKQCD
Coll., 2006
2+1 D picture in momentum space2+1 D picture in impact-parameter space
TMDsGPDs
• Accessed through Semi-Inclusive DIS
• OAM through spin-orbit correlations?
• Accessed through exclusive processes
• Ji sum rule for nucleon spinF
1T┴(x
) [
Siv
ers
fun
ctio
n]
quark density
Lattice QCD
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Electron-Ion Collider Designs
Stage I Stage II eRHIC @ BNL
MEIC / EIC @ JLab √s = 13 – 70 GeV
Ee = 3 – 12 GeV
Ep = 15 – 100 GeV
EPb
= up to 40 GeV/A
√s = 34 – 71 GeV
Ee = 3 – 5 (10 ?) GeV
Ep = 100 – 255 GeV
EPb
= up to 100 GeV/A
√s = up to ~180 GeV
Ee = up to ~30 GeV
Ep = up to 275 GeV
EPb
= up to 110 GeV/A
√s = up to ~140 GeV
Ee = up to 20 GeV
Ep = up to at least 250 GeV
EPb
= up to at least 100 GeV/A
(EIC)(MEIC)