12 GeV Science Program

R. D. McKeown

JSA Science Council January 7, 2011

Thanks to A. Lung, L. Cardman, others

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12 GeV Science Program

• The physical origins of quark confinement (GlueX, meson and baryon spectroscopy)

• The spin and flavor structure of the proton and neutron (PDF’s, GPD’s, TMD’s…)• The quark structure of nuclei• Probe potential new physics through high precision tests of the Standard Model

• Defining the Science Program: – Five Reviews: Program Advisory Committees (PAC) 30, 32, 34, 35, 36

– 2006 through 2010

– Results: 37 experiments approved ; 12 conditionally approved

– PAC37 scheduled January 2011: 9 new proposals, continue rankings

Exciting slate of experiments for 4 Halls planned for initial five years of operation!

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12 GeV Upgrade Project

Upgrade is designed to build on existing facility: vast majority of accelerator and experimental equipment have continued use

New Hall

Add arc

Enhanced capabilitiesin existing Halls

Add 5 cryomodules

Add 5 cryomodules

20 cryomodules

20 cryomodules

Scope of the project includes: •Doubling the accelerator beam energy•New experimental Hall and beamline•Upgrades to existing Experimental Halls

Maintain capability to deliver lower pass beam energies:

2.2, 4.4, 6.6….

Upgrade arc magnets and supplies

CHL upgrade

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Hall D – exploring origin of confinement by studying exotic mesons

Hall B – understanding nucleon structure via generalized parton distributions

Hall C – precision determination of valence quark properties in nucleons and nuclei

Hall A – short range correlations, form factors, hyper-nuclear physics, future new experiments (e.g. PV and Moller)

12 GeV Scientific Capabilities

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Quantum Numbers of Hybrid MesonsQuarks

Excited Flux Tube Hybrid Meson

S 0

L 0

J PC 0

J PC 1

1

J PC

1

1

, Klike

J PC 0 1 2

0 1 2

S 1

L 0

J PC 1

J PC 1

1

like ,

Exotic

Flux tube excitation (and parallel quark spins) lead to exotic JPC

5R. McKeown – Hadron Workhop - Beijing

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Proton Spin Puzzle

6R. McKeown – Hadron Workhop - Beijing

• DIS → DS 0.25

• RHIC + DIS → Dg« 1

• → Lq

D. de Florian et al., PRL 101 (2008) 072001

[X. Ji, 1997]

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Wpu(x,k

T,r ) Wigner distributions

d2kT

PDFs f1

u(x), .. h1u(x)

GPDs/IPDs

d2kT drzd3r

TMD PDFs f1

u(x,kT), .. h1u(x,kT)

3D imaging

6D Dist.

Form FactorsGE(Q2), GM(Q2)

d2rT

dx &Fourier Transformation

1D

Unified View of Nucleon Structure

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PAC 12 GeV Science Categories

• The Hadron spectra as probes of QCD(GluEx and heavy baryon and meson spectroscopy)

• The transverse structure of the hadrons (Elastic and transition Form Factors)

• The longitudinal structure of the hadrons (Unpolarized and polarized parton distribution functions)

• The 3D structure of the hadrons(Generalized Parton Distributions and Transverse Momentum Distributions)

• Hadrons and cold nuclear matter(Medium modification of the nucleons, quark hadronization, N-N correlations, hypernuclear spectroscopy, few-body experiments)

• Low-energy tests of the Standard Model and Fundamental Symmetries(Møller, PVDIS, PRIMEX, …..)

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12 GeV Approved Experiments by Physics Topics

Topic Hall A Hall B Hall C Hall D Total

The Hadron spectra as probes of QCD (rated) (GluEx and heavy baryon and meson spectroscopy) 1 1

The transverse struture of the hadrons (rated) (Elastic and transition Form Factors) 4 2 2 8

The longitudinal structure of the hadrons (rated) (Unpolarized and polarized parton distribution functions) 1 2 4 7

The 3D structure of the hadrons (unrated) (Generalized Parton Distributions and Transverse Momentum Distributions) 2 7 2 11

Hadrons and cold nuclear matter (rated) (Medium modification of the nucleons, quark hadronization, N-N correlations, hypernuclear spectroscopy, few-body experiments) 1 2 4 7

Low-energy tests of the Standard Model and Fundamental Symmetries (to be rated at PAC 37) 2 1 3

TOTAL 10 13 12 2 37

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12 GeV Approved Experiments by PAC Days

Topic Hall A Hall B Hall C Hall D Total

The Hadron spectra as probes of QCD (rated) (GluEx and heavy baryon and meson spectroscopy) 120 120

The transverse structure of the hadrons (rated) (Elastic and transition Form Factors) 144 70 118 332

The longitudinal structure of the hadrons (rated) (Unpolarized and polarized parton distribution functions) 23 120 118 261

The 3D structure of the hadrons (unrated) (Generalized Parton Distributions and Transverse Momentum Distributions) (190) (801) (80) 1071

Hadrons and cold nuclear matter (rated) (Medium modification of the nucleons, quark hadronization, N-N correlations, hypernuclear spectroscopy, few-body experiments) 5 100 102 207

Low-energy tests of the Standard Model and Fundamental Symmetries (to be rated at PAC 37) (592) (88) 680

TOTAL 954 1091 418 208 2671

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Super Bigbite Spectrometer (SBS) in Hall A

Scattering chamber

Vacuum snout

Magnetic shield

First tracker

Second tracker Hadron calorimeter

Beam line Pb shield

48D48 magnet

Third tracker

CH2 analyzer

Beam

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MIE Funding schedule under discussion with DOE

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SBS: Extension GEn to High Q2

• The dramatic turnover of the Argonne DSE model would be clearly visible. • If the turnover is seen, it would provide strong evidence for the importance of diquark

degrees of freedom in the nucleon form factors.12

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Møller & Deep Inelastic Scattering Parity Violation

• SoLID: general purpose deep inelastic parity violating experiment with solenoid

• Chinese contribution

• Dedicated Møller Experiment

(successor to SLAC E158)• DOE MIE proposal → CD0

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Future PV Program

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PAMELA Data on Cosmic Radiation

Va. Tech. Physics Colloquium, Dec. 3, 2010

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Surprising rise in e+ fraction

But not p

• Could indicate low mass A’ (MA’ < 1 GeV )

• Or local astrophysical origin??

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New Opportunity: Search for A’ at JLab

Search for new forces mediated by ~100 MeV vector boson A’

with weak coupling to electrons:

Irrespective of astrophysical anomalies: • New ~GeV–scale force carriers are important category of physics beyond the SM• Fixed-target experiments @JLab (FEL + CEBAF) have unique capability to explore this!

g – 2 preferred!

16Va. Tech. Physics Colloquium, Dec. 3, 2010

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A Short “White Paper”

→ NP2010 panel→ IHEP, potential new collaborators

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12 GeV Upgrade Schedule

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• Major Procurements (> $500K) nearly complete:– cryomodule cavities– beam transport magnets– cryogenics coldbox– vacuum valves– cold tuner– etc. etc. etc.

ACCELERATOR CONSTRUCTION

Beam Transport Quadrupole Magnets

(114 - total order - on site)

Cryomodule Cavities (12 of 80 ordered on site)

4-meter Dipole Magnets(23 of 37 ordered on site)

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12 GeV Upgrade – Cryomodule Cavity String

January 4, 2011

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Physics Equipment Construction

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Physics Equipment Construction

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Hall D Status – Dec. 2010

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Ready For Equipment (RFE)Dec. 28, 2010

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12 GeV Outlook

• Physics program is taking shape• “Beyond Standard Model” program is

growing

- Parity violation

- New gauge boson searches• Construction Project is on track• New equipment requirements (Hall A)

- Super Bigbite Spectrometer

- SOLID

- MOLLER