Searches for New Sources of CP and T Violation at Justin Albert Univ. of Victoria July 24, 2012 Representing the BaBar Collaboration

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

The Science Output  … but the physics sure hasn’t ended! End of data taking Searches for New Sources of CP Violation at 24 July 12 Searches for New Sources of CP Violation at J. Albert 4

Overview: 3 Sectors, 5 New Results Searches for New Sources of CP Violation at 24 July 12 Searches for New Sources of CP Violation at J. Albert 5  B sector 1) b → sss:  B → 3K CP V 2) b → s ℓ + ℓ - : B → K ℓℓ direct CP V search 3) b → ccs:B 0 → J/  K 0 first direct observation of T-violation in B system  Charm sector: D + → K + K 0  +  – T-odd correlation   sector:   → K 0  –  CP V search

 B sector 1) b → sss:  B → 3K CP V 2) b → s ℓ + ℓ - : B → K ℓℓ direct CP V 3) b → ccs:B 0 → J/  K 0 first direct observation of T-violation in B system arXiv: , PRD 85: (2012) arXiv: , submitted to PRD To be submitted to PRL

B → 3K CP V Searches for New Sources of CP Violation at 24 July 12 Searches for New Sources of CP Violation at J. Albert fb-1 arXiv: , PRD 85: (2012) 426 fb-1

B → 3K CP V: Dalitz Searches for New Sources of CP Violation at 24 July 12 Searches for New Sources of CP Violation at J. Albert fb-1 arXiv: , PRD 85: (2012) 426 fb-1

B → 3K CP V: Summary Searches for New Sources of CP Violation at 24 July 12 Searches for New Sources of CP Violation at J. Albert fb -1 arXiv: , PRD 85: (2012) 426 fb -1

B → Kℓℓ direct CP V Searches for New Sources of CP Violation at 24 July 12 Searches for New Sources of CP Violation at J. Albert fb-1 arXiv: , PRD submitted 426 fb-1 as a

B → Kℓℓ direct CP V Searches for New Sources of CP Violation at 24 July 12 Searches for New Sources of CP Violation at J. Albert fb-1 arXiv: , PRD submitted 426 fb-1

B → Kℓℓ direct CP V Searches for New Sources of CP Violation at 24 July 12 Searches for New Sources of CP Violation at J. Albert fb-1 arXiv: , PRD submitted 426 fb-1

B 0 → J/  K 0 : first direct observation of T-violation in the B system Searches for New Sources of CP Violation at 24 July 12 Searches for New Sources of CP Violation at J. Albert fb-1 To be submitted to PRL, 426 fb-1 1

B 0 → J/  K 0 : first direct observation of T-violation in the B system Searches for New Sources of CP Violation at 24 July 12 Searches for New Sources of CP Violation at J. Albert fb-1 To be submitted to PRL, 426 fb-1 S,S, ± C,C, ±

B 0 → J/  K 0 : first direct observation of T-violation in the B system Searches for New Sources of CP Violation at 24 July 12 Searches for New Sources of CP Violation at J. Albert fb-1 To be submitted to PRL, 426 fb-1 –+

B 0 → J/  K 0 : first direct observation of T-violation in the B system Searches for New Sources of CP Violation at 24 July 12 Searches for New Sources of CP Violation at J. Albert fb-1 To be submitted to PRL, 426 fb-1

 Charm sector: D + → K + K 0  +  – T-odd correlation arXiv: , PRD 84, (2012)

D + → K + K 0  +  – T-odd correlation Searches for New Sources of CP Violation at 24 July 12 Searches for New Sources of CP Violation at J. Albert fb-1 arXiv: , PRD 84: (2011) 520 fb-1

D + → K + K 0  +  – T-odd correlation Searches for New Sources of CP Violation at 24 July 12 Searches for New Sources of CP Violation at J. Albert fb-1 arXiv: , PRD 84: (2011) 520 fb-1 th

D + → K + K 0  +  – T-odd correlation Searches for New Sources of CP Violation at 24 July 12 Searches for New Sources of CP Violation at J. Albert fb-1 arXiv: , PRD 84: (2011) 520 fb-1

D + → K + K 0  +  – T-odd correlation Searches for New Sources of CP Violation at 24 July 12 Searches for New Sources of CP Violation at J. Albert fb-1 arXiv: , PRD 84: (2011) 520 fb-1

arXiv: , PRD-RC 85: (2012)    sector:   → K 0  –  CP V search

  → K 0  –  CP V search Searches for New Sources of CP Violation at 24 July 12 Searches for New Sources of CP Violation at J. Albert fb-1 arXiv: , PRD-RC 85: (2012) 476 fb-1 selection efficiency independent of

  → K 0  –  CP V search Searches for New Sources of CP Violation at 24 July 12 Searches for New Sources of CP Violation at J. Albert fb-1 arXiv: , PRD-RC 85: (2012) 476 fb-1 N signal (  - )= N signal (  + )=169455

  → K 0  –  CP V search Searches for New Sources of CP Violation at 24 July 12 Searches for New Sources of CP Violation at J. Albert fb-1 arXiv: , PRD-RC 85: (2012) 476 fb-1

  → K 0  –  CP V search Searches for New Sources of CP Violation at 24 July 12 Searches for New Sources of CP Violation at J. Albert fb-1 arXiv: , PRD-RC 85: (2012) 476 fb-1

To be submitted to PRL Summary: 5 new results in 3 sectors Searches for New Sources of CP Violation at 24 July 12 Searches for New Sources of CP Violation at J. Albert 24  B sector 1) b → sss:  B → 3K CP V 2) b → s ℓ + ℓ - : B → K ℓℓ direct CP V search 3) b → ccs:B 0 → J/  K 0 first direct observation of T-violation in B system  Charm sector: D + → K + K 0  +  – T-odd correlation   sector:   → K 0  –  CP V search arXiv: , PRD-RC 85: (2012) arXiv: , PRD 84: (2011) arXiv: , PRD submitted arXiv: , PRD 85: (2012) See also talks from Vasseur and Kass, with many other new Babar results! 3.1  deviation from SM prediction