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Unique New Physics Search at Belle II

Dive into the realm of new physics at Belle II with Adrian's presentation highlighting SuperB's potential. Explore charged Higgs searches, MSSM studies, CP phase detection, LFV in tau decays, and more exciting prospects!

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Unique New Physics Search at Belle II

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  1. Unique New Physics Search at BelleII Paoti Chang National Taiwan University NP in BelleII

  2. arXiv: 1002.5012 NP in BelleII

  3. Select a few channels that BelleII/SuperB can probe new physics better than LHC. • Adrian will highlight the strength of SuperB • New ideas, comments and suggestions are welcome. • Slides are selected from the talk slides given by Bostjan Golob at BPAC meeting. NP in BelleII

  4. Charged Higgs on B →t n BsigBtag (tn)(Xln) (Ynn)(Xln) ECL: new electronics background reduction Nsig=154 ± 36 signal Belle 50 ab-1: semil. + hadr. tag; main syst. reducible: bkg. ECL shape, e Btag Vub ±3%,fB ±3% NP in BelleII

  5. Similar study for B→D(*)tn • B →mn: 4.3 ab-1 for 5sdiscovery (SM Br); Charged Higgs Search 5 s discovery sensitivity Atlas Belle II, 5 ab-1 Belle II, 50 ab-1 tan b excluded currently (Br(Btn)) @ 95.5% 5s discovery, Belle II, 5 ab-1 5s discovery, Belle II, 50 ab-1 mH+ [GeV] Belle II Br(Btn)) sensitive to H+ at large mH+ and tan b at low tan b B  Xsg constraints the parameters Belle II reach @ L can be parametrized: tan b 5 ·(0.5 ab-1/L) ·[1·10-4GeV-2· (m - 90 GeV)2 + 12.2] NP in BelleII

  6. MSSM searches Belle II mass insertion approximation, example of flavor observables A.G. Akeroyd et al., KEK Report 2009-12 excluded by B Xsg S(KSp0g) low tanb DSf DSf=sin2f1(ccs) – sin2f1(sss) two points in (DSf, S(KSp0g)) DSf= [-0.3,-0.2] S(KSp0g) ~ -0.4 DSf= [0,0.1] S(KSp0g) ~ 0.1 NP in BelleII

  7. Search for Right-Handed Neutral Currents Belle II DSSD Belle II PXD Belle DSSD t-dependent CPV in KSp0g (S(KSp0g)) B decay vtx from Ks and IP; vertex detector: e(KSp+p-), s(t) A.G. Akeroyd et al., KEK Report 2009-12 sBelle Design Group, KEK Report 2008-7 s(SCP(Ksp0g))= 0.09 @ 5 ab-1 0.03 @ 50 ab-1 6th layer at r=13 cm 6th layer at r=14 cm 6th layer at r=15 cm 5 ab-1 50 ab-1 s(DS(Ksf))= 0.10 @ 5 ab-1 0.05 @ 50 ab-1 worse e worse sz NP in BelleII

  8. MSSM searches Belle II Example points: shown with expected accuracy @ 5 ab-1 DSf= [-0.3,-0.2] S(KSp0g) ~ -0.4 DSf= [0,0.1] S(KSp0g) ~ 0.1 Belle II can distinguish various SUSY models A.G. Akeroyd et al., KEK Report 2009-12 NP in BelleII

  9. Search for New CP Phase t s K • : • Tree+penguin processes,B →Kp • DAKp= A(K+p-)- A(K+p0)= -0.147±0.028 • model independent sum rule: • A(K0p+)=0.009 ±0.025 • A(K+p0)=0.050 ±0.025 • A(K+p-)=-0.098 ±0.012 • A(K0p0)=-0.01 ±0.10 g b W u B u d p d HFAG, LP’09 penguin dominated A(K0p0) dA(K+p0) M. Gronau, PLB627, 82 (2005); D. Atwood, A. Soni, PRD58, 036005 (1998) measured (HFAG) A(K0p+) sum rule expected (sum rule) Belle II 50 ab-1 HFAG, LP’09 NP in BelleII

  10. Tree+penguin processes,B0 →Kpp0 K*p, Kr: T+PEW/PQCD larger than in Kp similar as in Kp: isospin sum rule M. Gronau, D. Pirjol, J. Zupan, arXiv:1001.0702 • B0Kpp0: A(K*+p- ) & A(K*0p0) should destructively interfere. : : : : : • Large Acp on B0K*+p-, r- K+ andB0K*+p0, r0K+ • Check three Acp sum rules: K*p , rK and Kp NP in BelleII

  11. Search for LFV in t decays t →lg, t→ l h, t→ l -t →lg : bkg from ee→ ttg (U.L.  1/L) - t→ l h, t→ lll : bgk free (U.L.  1/L) example: Higgs mediated LFV, t→ mh with 10 ab-1 constraints on tanb improved by 30 - 40% for all mA identification of specific models sensitivity 10-9 and 7x10-9 @ 50 ab-1 Belle, 10 ab-1 little Higgs T parity MSSM NP in BelleII

  12. Other Topics and Summary • B → K* nn,Charm mixing, AFB(ee→mm) ... •  Adrian’s talk • Possible polarized beam and run at charm threshold for SuperB. • NP search: Btn, right-handed neutral currents, • Acp(K(*)p)/A(rK) sum rule tests, • LFV in t decays NP in BelleII

  13. Physics on Super B Factory, 1 NP in BelleII

  14. Physics at Super B Factory, 2 NP in BelleII

  15. Physics on Super B Factory, 3 NP in BelleII

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