Searches for New Sources Searches for New Sources

of CP of CP and Tand T Violation at Violation at

Justin

Albert

Univ. of Victoria

July 24, 2012July 24, 2012

Representing the Representing the BaBar CollaborationBaBar Collaboration

The Experiment

24 July 12 Searches for New Sources of CP Violation at Searches for New Sources of CP Violation at J. Albert 2

The Dataset

– 472 million neutral B– 472 million charged B – 690 million c anti-c pairs– 500 million τ+τ− pairs– 117 million Y(3S)– 93 million Y(2S)

Data taking ended 4 years ago…

24 July 12 Searches for New Sources of CP Violation at Searches for New Sources of CP Violation at J. Albert 3

The Science Output

… but the physics sure hasn’t ended!

End of data taking24 July 12 Searches for New Sources of CP Violation at Searches for New Sources of CP Violation at J. Albert 4

Overview: 3 Sectors, 5 New Results

24 July 12 Searches for New Sources of CP Violation at Searches for New Sources of CP Violation at J. Albert 5

B sector

• b → sss:B → 3K CP V

• b → sℓ+ℓ-: B → Kℓℓ direct CP V search

1) b → ccs:B0 → J/K 0 first direct

observation of T-violation in B system

Charm sector: D+ → K+K0+– T-odd correlation

1) sector: → K0–CP V search

B sector

1) b → sss:B → 3K CP V

2) b → sℓ+ℓ-: B → Kℓℓ direct CP V

3) b → ccs:B0 → J/K 0 first direct

observation of T-violation in B system

arXiv:1201.5897, PRD 85:112010 (2012)

arXiv:1201.5897, PRD 85:112010 (2012)

arXiv:1204.2852, submitted to PRD

arXiv:1204.2852, submitted to PRD

To be submitted to PRL

To be submitted to PRL

B → 3K CP V

24 July 12 Searches for New Sources of CP Violation at Searches for New Sources of CP Violation at J. Albert 6

arXiv:1201.5897, PRD 85:112010 (2012) 426 fb-1426 fb-1

arXiv:1201.5897, PRD 85:112010 (2012) 426 fb-1426 fb-1

B → 3K CP V: Dalitz

24 July 12 Searches for New Sources of CP Violation at Searches for New Sources of CP Violation at J. Albert 7

arXiv:1201.5897, PRD 85:112010 (2012) 426 fb-1426 fb-1

arXiv:1201.5897, PRD 85:112010 (2012) 426 fb-1426 fb-1

B → 3K CP V: Summary

24 July 12 Searches for New Sources of CP Violation at Searches for New Sources of CP Violation at J. Albert 8

arXiv:1201.5897, PRD 85:112010 (2012) 426 fb426 fb-1-1

arXiv:1201.5897, PRD 85:112010 (2012) 426 fb426 fb-1-1

B → Kℓℓ direct CP V

24 July 12 Searches for New Sources of CP Violation at Searches for New Sources of CP Violation at J. Albert 9

arXiv:1204.3933, PRD submitted 426 fb-1426 fb-1

arXiv:1204.3933, PRD submitted 426 fb-1426 fb-1

as a

B → Kℓℓ direct CP V

24 July 12 Searches for New Sources of CP Violation at Searches for New Sources of CP Violation at J. Albert 10

arXiv:1204.3933, PRD submitted 426 fb-1426 fb-1

arXiv:1204.3933, PRD submitted 426 fb-1426 fb-1

B → Kℓℓ direct CP V

24 July 12 Searches for New Sources of CP Violation at Searches for New Sources of CP Violation at J. Albert 11

arXiv:1204.3933, PRD submitted 426 fb-1426 fb-1

arXiv:1204.3933, PRD submitted 426 fb-1426 fb-1

B0 → J/K 0: first direct observation of

T-violation in the B system

24 July 12 Searches for New Sources of CP Violation at Searches for New Sources of CP Violation at J. Albert 12

To be submitted to PRL, 426 fb-1426 fb-1

To be submitted to PRL, 426 fb-1426 fb-1

1

B0 → J/K 0: first direct observation of

T-violation in the B system

24 July 12 Searches for New Sources of CP Violation at Searches for New Sources of CP Violation at J. Albert 13

To be submitted to PRL, 426 fb-1426 fb-1

To be submitted to PRL, 426 fb-1426 fb-1

S,± C,

±

B0 → J/K 0: first direct observation of

T-violation in the B system

24 July 12 Searches for New Sources of CP Violation at Searches for New Sources of CP Violation at J. Albert 14

To be submitted to PRL, 426 fb-1426 fb-1

To be submitted to PRL, 426 fb-1426 fb-1

– +

B0 → J/K 0: first direct observation of

T-violation in the B system

24 July 12 Searches for New Sources of CP Violation at Searches for New Sources of CP Violation at J. Albert 15

To be submitted to PRL, 426 fb-1426 fb-1

To be submitted to PRL, 426 fb-1426 fb-1

Charm sector: D+ → K+K0+– T-odd correlation

arXiv:1204.2852, PRD 84, 031103 (2012)

arXiv:1204.2852, PRD 84, 031103 (2012)

D+ → K+K0+– T-odd correlation

24 July 12 Searches for New Sources of CP Violation at Searches for New Sources of CP Violation at J. Albert 16

arXiv:1105.4410, PRD 84:031103 (2011)

520 fb-1520 fb-1

arXiv:1105.4410, PRD 84:031103 (2011)

520 fb-1520 fb-1

D+ → K+K0+– T-odd correlation

24 July 12 Searches for New Sources of CP Violation at Searches for New Sources of CP Violation at J. Albert 17

arXiv:1105.4410, PRD 84:031103 (2011)

520 fb-1520 fb-1

arXiv:1105.4410, PRD 84:031103 (2011)

520 fb-1520 fb-1

th

D+ → K+K0+– T-odd correlation

24 July 12 Searches for New Sources of CP Violation at Searches for New Sources of CP Violation at J. Albert 18

arXiv:1105.4410, PRD 84:031103 (2011)

520 fb-1520 fb-1

arXiv:1105.4410, PRD 84:031103 (2011)

520 fb-1520 fb-1

D+ → K+K0+– T-odd correlation

24 July 12 Searches for New Sources of CP Violation at Searches for New Sources of CP Violation at J. Albert 19

arXiv:1105.4410, PRD 84:031103 (2011)

520 fb-1520 fb-1

arXiv:1105.4410, PRD 84:031103 (2011)

520 fb-1520 fb-1

arXiv:1109.1527, PRD-RC 85:031102 (2012)

arXiv:1109.1527, PRD-RC 85:031102 (2012)

sector: → K0–CP V

search

→ K0–CP V search

24 July 12 Searches for New Sources of CP Violation at Searches for New Sources of CP Violation at J. Albert

20

arXiv:1109.1527, PRD-RC 85:031102 (2012)

476 fb-1476 fb-1

arXiv:1109.1527, PRD-RC 85:031102 (2012)

476 fb-1476 fb-1

selection efficiency independent of

→ K0–CP V search

24 July 12 Searches for New Sources of CP Violation at Searches for New Sources of CP Violation at J. Albert

21

arXiv:1109.1527, PRD-RC 85:031102 (2012)

476 fb-1476 fb-1

arXiv:1109.1527, PRD-RC 85:031102 (2012)

476 fb-1476 fb-1

Nsignal(-)=170211Nsignal(+)=169455

→ K0–CP V search

24 July 12 Searches for New Sources of CP Violation at Searches for New Sources of CP Violation at J. Albert

22

arXiv:1109.1527, PRD-RC 85:031102 (2012)

476 fb-1476 fb-1

arXiv:1109.1527, PRD-RC 85:031102 (2012)

476 fb-1476 fb-1

→ K0–CP V search

24 July 12 Searches for New Sources of CP Violation at Searches for New Sources of CP Violation at J. Albert 23

arXiv:1109.1527, PRD-RC 85:031102 (2012)

476 fb-1476 fb-1

arXiv:1109.1527, PRD-RC 85:031102 (2012)

476 fb-1476 fb-1

To be submitted to PRL

To be submitted to PRL

Summary: 5 new results in 3 sectors

24 July 12 Searches for New Sources of CP Violation at Searches for New Sources of CP Violation at J. Albert

24

B sector

1) b → sss:B → 3K CP V

2) b → sℓ+ℓ-: B → Kℓℓ direct CP V search

3) b → ccs:B0 → J/K 0 first direct

observation of T-violation in B system

Charm sector: D+ → K+K0+– T-odd correlation

1) sector: → K0–CP V search arXiv:1109.1527, PRD-RC 85:031102 (2012)

arXiv:1109.1527, PRD-RC 85:031102 (2012)

arXiv:1105.4410, PRD 84:031103 (2011)

arXiv:1105.4410, PRD 84:031103 (2011)

arXiv:1204.3933, PRD submitted

arXiv:1204.3933, PRD submitted

arXiv:1201.5897, PRD

85:112010 (2012)

arXiv:1201.5897, PRD

85:112010 (2012)

See also talks from Vasseur and Kass, with many other

new Babar results!

3.1 deviation from SM prediction