New Physics Searches from Ba Bar New Physics

New Physics Searches from Ba. Bar New Physics…? …or Old Standard Model? 12 th November 2008 Fergus Wilson, STFC/RAL 1

New Physics Searches in one slide n Flavour Changing Neutral Currents (FCNC) forbidden at the Tree level… q n Lepton Flavour Violation q q Light Higgs Dark Matter (a la LHC) Unparticles But try to use channels that are… q q n Not a fundamental symmetry. Direct Searches q n Look for new physics in penguin loops. Experimentally well-measured and… …theoretically clean. …not always that simple. 12 th November 2008 Fergus Wilson, STFC/RAL 2

Topics to be covered n n n n q Electro-weak penguins (b→sγ, b→dγ). B→sγ, s l+ l-, K*νν B→ K 0 s (γ) B→(ρ/ω)γ Leptonic B decays. B→τν, l+l-, l+τLepton Flavour Violation in tau decays. τ→μν, eν, lll, lhh, l/ /η/η/λ/ω CP Violation. Strange Charmless penguins and comparison with golden mode Higgs searches. Y(3 S)→γ A 0 Summary. How much new physics are we allowed? 12 th November 2008 Fergus Wilson, STFC/RAL 3

PRD 72, 052004 (2005) PRD 77, 051103 (2008), 232 Mevts b→sγ g ar. Xiv: 0805. 4796, 383 Mevts B 0/+ n n Theoretically clean B →sγ q But NP can enhance ACP by 15% but experimentally measure B→Xsγ Need to make measurements in ranges of hadronic mass (lower photon energy limit). 3 methods q Inclusive q Semi-Inclusive (sum of exclusive modes) q Recoil (reconstruct other B) 12 th November 2008 Fergus Wilson, STFC/RAL 4

ar. Xiv: 0804. 4412 v 1 : 384 Mevts b→ s l+l- ar. Xiv: 0807. 4119 v 1 384 Mevts Possible NP insertions: Sensitive (10%) to Higgsdoublet models at large tanβ 12 th November 2008 Fergus Wilson, STFC/RAL 5

ar. Xiv: 0804. 4412 v 1 : 384 Mevts ar. Xiv: 0807. 4119 v 1 384 Mevts B→K(*)l+l- Consistent with SM SM Consistent with SM (K, K*)l+l- combined Different C 9 C 10 Wilson coefficients Not Consistent (3. 9σ) with SM in low q 2? 12 th November 2008 Fergus Wilson, STFC/RAL 6

PRD 78, 072007 (2008) : 454 Mevts b→s νν (B→K*νν) n n n Like K*ll but… q No photon penguin q Reduced long-distanced effects. q Smaller SM BF: n (1. 3+0. 4 -0. 3)x 10 -5 Possible non-SM effects q x 10 enhancement Opportunity for non-SM missing energy: q Dark Matter q Unparticles 12 th November 2008 Background Signal Eextra = remaining neutral energy not associated with tag or signal B meson. Fergus Wilson, STFC/RAL 7

PRD 78, 071102 (2008) : 467 Mevts B→ K 0 s 0 (γ) Probes polarisation of photon. b→sγ left handed but NP could change that. S expected to be small Could change as a function of MK whole mass range 12 th November 2008 Fergus Wilson, STFC/RAL 8

ar. Xiv: 0808. 1379 v 1 465 Mevts B→(ρ/ω)γ 12 th November 2008 Fergus Wilson, STFC/RAL 9

SM B+→τ+ν non-SM PRD 76, 052002 (2007) 383 Mevts PRD 77, 011107 (2008) 383 Mevts Is there tension here? out of date 12 th November 2008 Fergus Wilson, STFC/RAL 10

B+→τ+ν (tension looked at another way) Without B→τν With sin 2β Without sin 2β 12 th November 2008 Fergus Wilson, STFC/RAL 11

B 0→l+l-, B 0→l+τ- , B+→l+ν PRD 77, 032007 (2007) 384 Mevts PRD 77, 091194 (2008) 378 Mevts o) BF suppressed by m 2 and Vbd o) In MFV context, BF is correlated with non-SM parameters e. g. tanβ Non-SM Higgs? Green - where signal would occur 12 th November 2008 Fergus Wilson, STFC/RAL 12

Lepton Flavour Violation in τ decays t→mg BR < 0. 68 x 10 -7 (PRL 95 (2005) 041802) t→eg BR < 1. 10 x 10 -7 (PRL 96 (2006) 041801) t→lll BR < (0. 4 -0. 8) x 10 -7 (PRL 99 (2007) 251803) t→lπ/η/η’ BR < (1. 1 -1. 6) x 10 -7 (PRL 98 (2007) 061803) t→lhh’ BR < (0. 7 -4. 8) x 10 -7 (PRL 95 (2005) 191801) t→l ω BR < (1. 0 -1. 1) x 10 -7 (PRL 100 (2008) 071802) MNS CKM Gaugino Mass PRD 74, 116002 (2006) PRL 98, 061803 (2007) 12 th November 2008 Fergus Wilson, STFC/RAL Pseudoscalar Higgs mass 13

Strange Charmless Penguins (b→ccs v. b→qqs) 12 th November 2008 Fergus Wilson, STFC/RAL golden mode 14

Light Higgs: Υ(3 S)→γA 0, A 0 →χχ ar. Xiv: 0808. 0017 : 467 Mevts MA= 5. 2 Gev/c 2 12 th November 2008 Fergus Wilson, STFC/RAL 15

How much New Physics can we have? L. Silvestrini, ICFA 2008, SLAC 12 th November 2008 Fergus Wilson, STFC/RAL 16

Conclusions n n n n Many of the “discrepancies” have gone away with more data. Some new tensions have appeared. Most differences are 2 -3σ. LHCb will have something to say. Belle still taking data and Ba. Bar still publishing. Historical Note: All New Physics has turned out to be mis-understood Standard Model but…we are entering an energy regime where we expect to see something if the Standard Model is to survive. The flavour properties of the Higgs or SUSY will need to be studied to have a complete understanding of the models. 12 th November 2008 Fergus Wilson, STFC/RAL 17