fundamental symmetries in nuclear physics l.
Download
Skip this Video
Download Presentation
Fundamental Symmetries in Nuclear Physics

Loading in 2 Seconds...

play fullscreen
1 / 35

Fundamental Symmetries in Nuclear Physics - PowerPoint PPT Presentation


  • 93 Views
  • Uploaded on

The next decade presents NP with a historic opportunity to build on this legacy in developing the “new Standard Model” The value of our contribution will be broadly recognized outside the field.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Fundamental Symmetries in Nuclear Physics' - ronny


Download Now An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
fundamental symmetries in nuclear physics

The next decade presents NP with a historic opportunity to build on this legacy in developing the “new Standard Model”

The value of our contribution will be broadly recognized outside the field

Nuclear physics studies of fundamental symmetries played an essential role in developing & confirming the Standard Model

Our role has been broadly recognized within and beyond NP

Fundamental Symmetries in Nuclear Physics

Fifty years of parity-violation in nuclear physics

Michael Ramsey-Musolf, Chicago, January, 2007

community input
Community Input
  • Pre-Town Meeting Caltech Dec. 7-8, 2006
  • This Town Meeting
  • White paper

Substantial work by the organizing committee

fundamental symmetries cosmic history4

Big Bang Nucleosynthesis (BBN) & light element abundances

  • Weak interactions in stars & solar burning
  • Supernovae & neutron stars

It utilizes a simple and elegant symmetry principle

SU(3)c x SU(2)L x U(1)Y

to explain the microphysics of the present universe

SM Unfinished Business

  • Sea quarks & gluons
  • Weak NN interaction

Electroweak probes can provide new insights

Standard Model puzzles

Standard Model successes

Fundamental Symmetries & Cosmic History
fundamental symmetries cosmic history5

Electroweak symmetry breaking: Higgs ?

  • Supersymmetry ?
  • New gauge interactions?
  • Extra dimensions ?

Beyond the SM

SM symmetry (broken)

Fundamental Symmetries & Cosmic History

Puzzles the Standard Model can’t solve

Origin of matter

Unification & gravity

Weak scale stability

Neutrinos

What are the symmetries (forces) of the early universe beyond those of the SM?

scientific questions

Why is there more matter than antimatter in the present universe? EDM, DM, LFV, q13 …

  • What are the unseen forces that disappeared from view as the universe cooled? Weak decays, PVES, gm-2,…
  • What are the masses of neutrinos and how have they shaped the evolution of the universe? 0nbb decay, q13, b decay,…
  • What is the internal landscape of the proton? PVES, hadronic PV, n scattering,…

Tribble report

Scientific Questions
scientific achievements
Scientific Achievements
  • World’s most precise measurement of (gm-2) Possible first indications of supersymmetry; over 800 citations
  • Most precise measurement of sin2qW off the Z0 resonance using PV Moller scattering; constrains new physics at the TeV scale (Z’, RPV SUSY…)
  • Definitive determinations of strange quark contributions to nucleon EM form factors using PV electron-proton & electron-nucleus scattering; confirmed theoretical estimates of hadronic effects in electroweak radiative corrections
scientific achievements9
Scientific Achievements
  • Quark-lepton universality tested to 0.05% using superallowed nuclear b-decay, yielding most precise value of any CKM matrix element (Vud) 2006 Bonner Prize in Nuclear Physics recognizing work of Towner & Hardy
  • Completion of a comprehensive set of computations of supersymmetric effects in low-energy electroweak observables; 2005 Dissertation Award in Nuclear Physics to A. Kurylov
  • Reduction in the theoretical hadronic uncertainty in extraction of Vud from neutron and nuclear b-decay
scientific achievements10
Scientific Achievements
  • Development of a EFT treatments of parity violation in the nucleon-nucleon interaction that will guide the future experimental program at the SNS and NIST
  • Substantial technical developments opening the way for searches for the permanent EDMs of the neutron, neutral atoms, deuteron and electron with 2-4 orders of magnitude greater sensitivity
technological achievements investments
Technological Achievements & Investments

Fundamental Neutron Physics Beamline at SNS

1.4 MW , 1 GeV H- beam on L Hg

Also new capabilities at LANSCE, NIST…

Muon storage ring at BNL

ISAAC, RIAcino….

CEBAF 12 GeV Up-grade

challenges what role can low energy studies play in the lhc era

Two frontiers in the search for new physics

Collider experiments (pp, e+e-, etc) at higher energies (E >> MZ)

Indirect searches at lower energies (E < MZ) but high precision

Large Hadron Collider

Ultra cold neutrons

CERN

Particle, nuclear & atomic physics

High energy physics

Challenges: What role can low energy studies play in the LHC era ?
scientific opportunities
Scientific Opportunities

The Origin of MatterNew Forces in the Early Universe Electroweak Probes of QCD

the origin of matter energy

“Known Unknowns”

Cosmic Energy Budget

Electroweak symmetry breaking: Higgs ?

Weak scale baryogenesis can be tested experimentally

Nuclear Science mission: explain the origin, evolution, & structure of the baryonic component

Beyond the SM

SM symmetry (broken)

The Origin of Matter & Energy

Baryogenesis: When? CPV? SUSY? Neutrinos?

WIMPy D.M.: Related to baryogenesis?

“New gravity”? Lorentz violation? Grav baryogen ?

?

baryogenesis new electroweak physics

Weak Scale Baryogenesis

  • B violation
  • C & CP violation
  • Nonequilibrium dynamics

Topological transitions

Broken phase

1st order phase transition

Sakharov, 1967

  • Is it viable?
  • Can experiment constrain it?
  • How reliably can we compute it?
Baryogenesis: New Electroweak Physics

90’s: Cohen, Kaplan, NelsonJoyce, Prokopec, Turok

Unbroken phase

CP Violation

edm probes of new cp violation

Yale, Indiana, Amherst

ANL, Princeton, TRIUMF…

SNS, ILL, PSI

CKM

fdSM dexp dfuture

BNL

Also 225Ra, 129Xe, d

If new EWK CP violation is responsible for abundance of matter, will these experiments see an EDM?

EDM Probes of New CP Violation
baryogenesis edms colliders

dn similar

Theory progress & challenge: refined computations of baryon asymmetry & EDMs

baryogenesis

LHC reach

LHC reach

ILC reach

LEP II excl

Present de

Present de

Present de

Prospective de

Prospective de

Prospective de

Baryogenesis: EDMs & Colliders
dark matter baryogenesis solar n s

No signal in SuperK detector

Assuming Wc ~ WCDM

baryogenesis

Ice Cube

Future

Cirigliano, Profumo, R-M

Dark Matter & Baryogenesis: Solar ns

Gravitational capture in sun followed by annihilation into high energy neutrinos

precision probes of new symmetries

Electroweak symmetry breaking: Higgs ?

?

Beyond the SM

SM symmetry (broken)

Precision Probes of New Symmetries

New Symmetries

Origin of Matter

Unification & gravity

Weak scale stability

Neutrinos

precision electroweak measurements and collider searches are complementary

Probing Fundamental Symmetries beyond the SM:

Use precision low-energy measurements to probe virtual effects of new symmetries & compare with collider results

  • Precision measurements predicted a range for mt before top quark discovery
  • mt >> mb !
  • mt is consistent with that range
  • It didn’t have to be that way

Radiative corrections

Direct Measurements

Stunning SM Success

Precision Electroweak Measurements and Collider Searches are Complementary

J. Ellison, UCI

weak decays

b-decay

SM theory input

Recent Marciano & Sirlin

Weak decays
slide23

Vus & Vud theory ?

New 0+ info ?

CKM Summary: New Vus & tn ?

New tn !!

UCNA

weak decays new physics

Correlations

SUSY models

Vud from neutron decay: LANSCE, SNS, NIST

Similarly unique probes of new physics in muon and pion decay

CKM, (g-2)m, MW, Mt

Non (V-A) x (V-A) interactions: me/E

SUSY

SNS, NIST, LANSCE, RIA?

Weak decays & new physics
weak mixing in the standard model

JLab Future

SLAC Moller

Z0 pole tension

Parity-violating electron scattering

Scale-dependence of Weak Mixing

Weak Mixing in the Standard Model
probing susy with pv electron scattering

RPV: No SUSY DM Majorana n s

SUSY Loops

d QWP, SUSY / QWP, SM

d QWe, SUSY / QWe, SM

gm-2

12 GeV

6 GeV

E158

Probing SUSY with PV Electron Scattering
muon anomalous magnetic moment

p

g

Z

m

m

Had VP

Had LbL

QED

Weak

SUSY Loops

SM Loops

Future goal

Muon Anomalous Magnetic Moment
fundamental symmetries cosmic history28

Big Bang Nucleosynthesis (BBN) & light element abundances

  • Weak interactions in stars & solar burning
  • Supernovae & neutron stars

It utilizes a simple and elegant symmetry principle

SU(3)c x SU(2)L x U(1)Y

to explain the microphysics of the present universe

SM Unfinished Business

  • Sea quarks & gluons
  • Weak NN interaction

Electroweak probes can provide new insights

Standard Model puzzles

Standard Model successes

Fundamental Symmetries & Cosmic History
deep inelastic pv beyond the parton model sm

Higher Twist: qq and qqg correlations

e-

e-

*

Z*

X

N

Charge sym in pdfs

12 GeV

6 GeV

d(x)/u(x): large x

Electroweak test: e-q couplings & sin2qW

Deep Inelastic PV: Beyond the Parton Model & SM
parity violating nn interaction

Effective Field Theory

  • Model Independent (7 LECs)
  • Few-body systems (SNS, NIST…)
  • QCD: weak qq interactions in strong int environment
  • Weak Int in nuclei (0nbb decay)

Long range: p-exchange?

T=0 force

T=1 force

Parity-Violating NN Interaction
fundamental symmetries in nuclear physics opportunities for great impact

Support university rsch (exp’t & th’y)

  • EDMs !
  • Magnets for SNS
  • Electroweak program at JLab (6 & 12 GeV)
  • Muon g-2
  • Cross disciplines: DM & LFV

Let’s continue the legacy !

Fundamental Symmetries in Nuclear Physics: Opportunities for Great Impact

Fifty years of parity-violation in nuclear physics

organizing committee

/Caltech

Greene Geoff Oak Ridge Nationa Lab/U. Tennessee

Organizing Committee

Symmetries Subcommittee

Neutrino Subcommittee

participants
Participants

Group A: ~ 28

Group B: ~ 13

Group C: ~ 27

TOTAL: ~ 45

working groups
Working Groups

Group A:Precision Studies of Standard Model Electroweak Processes

Bill Marciano*

Dave Hertzog (weak decays, PVES, gm-2,…)

Brad Filippone

Group B:Electroweak Probes of Hadron and Nuclear Structure

Geoff Greene*

Barry Holstein (PVES, hadronic PV,…)

Group C: Rare and Forbidden Processes

Allena Opper*

Paul Huffman (EDM, LFV, dark matter,…)

Other: Dark Matter (joint with Neutrinos)

Spencer Klein

George Fuller (in Chicago)