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Fermilab charged lepton program. CLFV  new mixing matrix Multi-decade program to determine 4 free parameters Flavor conserving Muon g-2 Flavor violating Mu2e Next generation Mu2e @ Project X m  e g , m  e ee , m + e -  e + m - also being considered @ Project X CP violating

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fermilab charged lepton program
Fermilab charged lepton program
  • CLFV new mixing matrix
    • Multi-decade program to determine 4 free parameters
  • Flavor conserving
    • Muon g-2
  • Flavor violating
    • Mu2e
    • Next generation Mu2e @ Project X
    • meg, meee , m+e-e+m- also being considered @ Project X
  • CP violating
    • e EDM with rare isotopes
    • m EDM storage ring experiments

B. Casey, BNL Colloquium

around the world
Around the world

Physics for the next 4 decades:

Cold traps,

intense muon sources,

super B factories,

t/charm factories,

lepton colliders,

Hadron colliders…

m→eg, mN→eN

t→eg, eee

t→mg, mmm

(g-2)e, (g-2)m, (g-2)t

CP violation: lepton EDM measurements

B. Casey, BNL Colloquium

kick starting the program the new muon g 2 experiment
Kick starting the program:the new muon g-2 experiment

Pbar complex

target

ring

B. Casey, BNL Colloquium

  • Follow up of BNL experiment but better:
    • Reuse the storage ring
    • 10x longer decay channel
    • Segmented calorimeters
    • Tracking
    • >20x statistics, >2x less systematics
  • Coupled with a world wide program to interpret the measurement
it is happening
It is happening!

Detector R&D:

B. Casey, BNL Colloquium

it is happening1
It is happening!

Full g4 ring simulation

Transport line designs

B. Casey, BNL Colloquium

it s happening
It’s happening!
  • Hadronic Light by Light scattering is the last major component of predicted value based on model dependent calculations
  • New program at KLOE to measure dominant contributions to this diagram with 2 photon physics at very low Q2
  • With this new data, (g-2)m theory error will be almost entirely driven by independent experiments

B. Casey, BNL Colloquium

it s happening1
It’s happening!

Feng, Petschiles, Jansen, Renner arXiv:1103.4818

3% (!)

Lattice community is becoming actively engaged in the g-2 effort

On the way to providing a first principles calculation of muon g-2

B. Casey, BNL Colloquium

it s happening2
It’s happening!

Mandy Rominsky FNAL

Kelly Hardin FNAL

Chris Polly FNAL

BC FNAL

Leah Welty-Rieger FNAL/Northwestern

B. Casey, BNL Colloquium

it s happening3
It’s happening!

Matthew Gubanich and David Orozco

Don Von Lintig BNL

Matthew Gubanich and David Orozco from Regis

John Benante BNL

B. Casey, BNL Colloquium

it s happening4
It’s happening!

Lattice

independent measurements

muon g-2 measurements

two photon

g-2

BNL

R scan

tau spectral function

FNAL

electron g-2

muonium

JPARC

radiative return

B. Casey, BNL Colloquium

conclusions
Conclusions

“It ain’t over till its over.”

-Yogi Berra

‘Fermilab program’ builds in many ways on Brookhaven ideas and accomplishments

Fermilab is the right place at the right time

Brookhaven is a strong collaborator on many of these projects and is essential to the success of the program

B. Casey, BNL Colloquium

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