Miguel A. Sanchis-Lozano* Upsilon(1S,2S,3S) running @ Super B Miguel A. Sanchis-Lozano* *On behalf of the Quarkonium Working Group http://www.qwg.to.infn.it/ email: mas@ific.uv.es Department of Theoretical Physics & IFIC University of Valencia – CSIC Spain Super B V Paris May 9-11, 2007 Miguel A. Sanchis-Lozano IFIC-Valencia

Physics potential of Super B for heavy quarkonium Fundamental tests of hadronic structure and dynamics: spectroscopy, production and decays of charmonium and bottomonium - Search for/confirmation of new particles and states: mesons, baryons, exotics, gluonium… and determination of their nature (molecular, hybrids, tetraquark…) - Precise determination of widths and branching fractions (beyond the few percent level) Tests of novel nonperturbative and perturbative QCD phenomena, development of effective theories and lattice QCD Precise extraction of SM parameters: αs, masses Search for non-standard particles: from light dark matter (e.g. light neutralinos) to a light CP-odd Higgs boson showing up in heavy quarkonium decays Super B V Paris May 9-11, 2007 Miguel A. Sanchis-Lozano IFIC-Valencia

Light neutral Higgs scenarios Higgs sector in the NMSSM: (seven) 2 neutral CP-odd Higgs bosons (A1,2) 3 neutral CP-even Higgs bosons (H1,2,3 ) 2 charged Higgs bosons (H±) L & H PQ symmetry or U(1)R slightly broken → a light pseudoscalar Higgs A1 Coupling of A1 to down type fermions: Light dark matter? NMSSM candidate: Light neutralino with a singlet component The A1 would be the lightest Higgs: Super B V Paris May 9-11, 2007 Miguel A. Sanchis-Lozano IFIC-Valencia

Light Higgs windows at LEP (CPV MSSM) hep-ex/0406057 hep-ex/0406057 Diagram illustrating the effective coupling of a Higgs mass eigenstate H1 to the Z. Only the CP-even admixture h and H couple to Z while the CP-odd A does not: hence the coupling of the H1 is reduced wrt a CPC scenario. hep-ex/0406057 CPX MSSM 95% exclusion areas using scans with different values of arg (At,b). The region excluded by Yukawa searches, Z-width constraints or decay independent searches is shown in red CPX MSSM 95% exclusion areas using scans with different values of the top mass Super B V Paris May 9-11, 2007 Miguel A. Sanchis-Lozano IFIC-Valencia

Mixing of a pseudoscalar Higgs A0 and a b resonance e+ e-     τ+ τ- A00 , b0 unmixed states A0 , b mixed (physical) states Super B V Paris May 9-11, 2007 Miguel A. Sanchis-Lozano IFIC-Valencia

Miguel A. Sanchis-Lozano IFIC-Valencia Mixing(II) Xd = 10 Xd = 40 broader b b mass shift Hyperfine splitting m-mb unexpectedly large b > [b2g] Super B V Paris May 9-11, 2007 Miguel A. Sanchis-Lozano IFIC-Valencia

b resonance Searches for b states over more than 20 years / No signal found so far! b resonance / A0 Higgs boson Petit bourgeois Enfant terrible Entangled both theoretically and experimentally? Super B V Paris May 9-11, 2007 Miguel A. Sanchis-Lozano IFIC-Valencia

Expected LU breaking Xd=10, b0 = 5 MeV Green line: non-resonant decay Black line: resonant decay Red line: sum Xd=10, b0 = 5 MeV Super B V Paris May 9-11, 2007 Miguel A. Sanchis-Lozano IFIC-Valencia

Proposal of testing lepton universality (to the percent level) @ a (Super) B factory With the machine sitting on the (3S) Final state & BF (3S)  π + π - (1S,2S) → + - π + π - + - BF  2-4 x 10-2 BF  2 x 10-2 BF  4 - 8 x 10-4 (3S)  π + π - (1S,2S) →  +  - π + π - l + l - BF  10-1  +  - → l + l - X, l = e,  BF  5 - 10 x 10-5 (3S)  +  - +  - BF  2 x 10-2 BF  2 x 10-2 (3S)   +  - l + l - X → l + l - X, l = e,  BF  2 x 10-3 With the machine sitting on the (4S) (4S)  π + π - (1S,2S) → + - π + π - + - BF  10-4 BF  2 x 10-2 BF  2 x 10-6 (4S)  π + π - (1S,2S) →  +  - π + π - l + l - X BF  10-1  +  - → l + l - X, l = e,  BF  2 x 10-7 Compare rates Compare rates Statistical error ≈ 0.07 / √ # fb-1 Systematic error ≤ 0.037 Compare rates Super B V Paris May 9-11, 2007 Miguel A. Sanchis-Lozano IFIC-Valencia

Miguel A. Sanchis-Lozano IFIC-Valencia Summary Very interesting QCD program to be developed @ Super B: new states, precise measurements, novel phenomena... complementing theoretical developments: effective theories, Lattice QCD... QWG Actions items under preparation What if... There exists a light Higgs-like particle? A high luminosity B factory is the ideal place to discover/study it MERCI Super B V Paris May 9-11, 2007 Miguel A. Sanchis-Lozano IFIC-Valencia