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Precision Tests

Precision Tests. Weak Decays Neutral Current Processes Muon g-2. Muons. g m -2 m A -> eA. Nuclei & Charged Leptons. PV Electron Scattering. Q-Weak 12 GeV Moller PV DIS. Weak Decays. n decay correlations nuclear b decay pion decays muon decays. VI. Weak Decays.

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Precision Tests

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  1. Precision Tests • Weak Decays • Neutral Current Processes • Muon g-2

  2. Muons • gm-2 • mA->eA Nuclei & Charged Leptons PV Electron Scattering • Q-Weak • 12 GeV Moller • PV DIS Weak Decays • n decay correlations • nuclear b decay • pion decays • muon decays

  3. VI. Weak Decays • -decay: CKM unitarity & correlations • Pion leptonic decay • Muon decay

  4. b-decay SM & New Physics SUSY Weak decays: SM old & new

  5. = 1 SM Expt - 2008 Weak decays: 2004

  6. b-decay 0+-> 0+ “Superallowed” Nuclear structure-dependent corrections Weak decays

  7. Lifetime & correlations b-decay 58Ni coated stainless guide Flapper valve Liquid N2 Be reflector LHe LANSCE: UCN “A” NIST, ILL: tn Future SNS: tn, a,b,A,… Future LANSCE: tn Solid D2 Ultra cold neutrons 77 K poly UCN Detector Tungsten Target Weak decays

  8. b-decay PSI: “Pi-Beta” Weak decays

  9. b-decay SM theory input Recent Marciano & Sirlin Weak decays

  10. Situation Unsettled kaon decay Value of Vusimportant New physics: too small Weak decays

  11. CKM Summary: PDG04 UCNA

  12. Vus & Vud theory ? Perkeo 06 New 0+ info CKM Summary: New Vus & tn ? New tn UCNA

  13. Vertex & External leg SUSY Radiative Corrections Propagator Box Kurylov & RM

  14. 12k 1j1 12k 1j1 L=1 L=1 SUSY: R Parity-Violation

  15. No SUSY DM: LSP unstable • Neutrinos are Majorana Flavor-blind SUSY-breaking 12k R ParityViolation Kurylov, R-M, Su CKM unitarity ? MW CKM, (g-2)m, MW, Mt ,… APV l2 b-decay 12k 1j1 1j1 No long-lived LSP or SUSY DM New physics Kurylov, R-M RPV SUSY Weak decays: SUSY

  16. Correlations Non (V-A) x (V-A) interactions: me/E Weak decays & SUSY SUSY

  17. Gauge interactions: c symmetric Triscalar interactions One solution: af ~ Yf Higgs interactions: break c symmetry, but gently for 1st & 2nd generations Is c sym breaking gentle for 1st & 2nd generation sfermions ? Weak decays & SUSY : Chiral Symmetry Chiral (c )Rotation

  18. Profumo, R-M, Tulin Future exp’t ? Collider signature: SUSY but only SM-like Higgs Is cSB / mf as in SM ? Large c symmetry breaking: New SUSY models Mass suppressed c symmetry breaking: “alignment” models Weak decays & SUSY : Correlations Chiral symmetry breaking in SUSY

  19. SM radiative corrections also have QCD effects SM strong interaction effects: parameterized by Fp Hard to compute To probe effects of new physics in DNEW we need to contend with QCD Pion leptonic decay & SUSY

  20. Leading QCD uncertainty: Cirigliano & Rosell Marciano & Sirlin Tulin, Su, R-M Probing Slepton Universality vs Min (GeV) New TRIUMF, PSI Can we do better on ? Pion leptonic decay & SUSY

  21. Cirigliano & Rosell Min (GeV)

  22. VII. Neutral Currents • Parity-violating electron scattering (PVES) • Muon g-2

  23. Muons • gm-2 • mA->eA Nuclei & Charged Leptons: PV PV Electron Scattering • Q-Weak • 12 GeV Moller • PV DIS Weak Decays • n decay correlations • nuclear b decay • pion decays • muon decays

  24. “Weak Charge” ~ 0.1 in SM Enhanced transparency to new physics Small QCD uncertainties (Marciano & Sirlin; Erler & R-M) QCD effects (s-quarks): measured (MIT-Bates, Mainz, JLab) Lepton Scattering & New Symmetries Parity-Violating electron scattering

  25. Flavor-dependent sin2 Normalization Scale-dependent effective weak mixing Constrained by Z-pole precision observables Flavor-independent QW and SUSY Radiative Corrections Tree Level Radiative Corrections

  26. SU(2)L U(1)Y Weak Charge & Weak Mixing Weak mixing depends on scale

  27. JLab Future SLAC Moller Z0 pole tension Parity-violating electron scattering Scale-dependence of Weak Mixing Weak Mixing in the Standard Model

  28. Muons Weak Decays • gm-2 • mA->eA • n decay correlations • nuclear b decay • pion decays • muon decays • Essential Role for Theory • Precise SM predictions (QCD) • Sensitivity to new physics & complementarity w/ LHC Nuclei & Charged Leptons: Theory PV Electron Scattering • Q-Weak • 12 GeV Moller • PV DIS • Substantially reduced QCD uncertainty in sin2qW running • QCD uncertainties in ep box graphs quantified • Comprehensive analysis of new physics effects

  29. Vertex & External leg Kurylov, RM, Su SUSY Radiative Corrections Propagator Box

  30. Moller (ee) RPV: No SUSY DM Majorana n s SUSY Loops Q-Weak (ep) d QWP, SUSY / QWP, SM d QWe, SUSY / QWe, SM Hyrodgen APV or isotope ratios gm-2 12 GeV 6 GeV E158 Global fit: MW, APV, CKM, l2,… Kurylov, RM, Su PVES & APV Probes of SUSY

  31. e RPV Loops p Comparing AdDIS and Qwp,e

  32. QWP = 0.0716 QWe = 0.0449 Experiment SUSY Loops E6 Z/ boson RPV SUSY Leptoquarks SM SM Weak Charges & New Physics

  33. The next decade presents NP with a historic opportunity to build on this legacy in developing the “new Standard Model” The value of our contribution will be broadly recognized outside the field Nuclear physics studies of ns & fundamental symmetries played an essential role in developing & confirming the Standard Model Our role has been broadly recognized within and beyond NP The Big Picture Solar ns & the neutrino revolution Fifty years of PV in nuclear physics

  34. References • “Low Energy Precision Test of Supersymmetry”, M.J. Ramsey-Musolf & S. Su, Phys.Rept.456:188, 2008, e-Print: hep-ph/0612057Model” • “Low energy tests of the weak interaction”, J. Erler & M. J. Ramsey-Musolf , Prog.Part.Nucl.Phys.54:351 442, 2005, e-Print: hep-ph/0404291 Plus many references therein…

  35. Electroweak symmetry breaking: Higgs ? ? Low-energy: precision frontier LHC: energy frontier Beyond the SM SM symmetry (broken) Precision Probes of New Symmetries New Symmetries Origin of Matter Unification & gravity Weak scale stability Neutrinos

  36. Thank you ! To the organizers, staff, and participants for a lively and productive school • Precision studies and symmetry tests with neutrons are poised to discovery key ingredients of the new Standard Model during the next decade • Physics “reach” complements and can even exceed that of colliders: dn~10-28 e-cm ; O/OSM ~ 10-4 • Substantial experimental and theoretical progress has set the foundation for this era of discovery • The precision frontier is richly interdisciplinary: nuclear, particle, hadronic, atomic, cosmology + …….

  37. Back Matter • Weak Decays • Neutral Current Processes • Muon g-2

  38. Higher Twist: qq and qqg correlations e- e- * Z* X N Charge sym in pdfs 12 GeV 6 GeV d(x)/u(x): large x Electroweak test: e-q couplings & sin2qW Deep Inelastic PV: Beyond the Parton Model & SM

  39. Neutrino correlation Pion leptonic decays • Ongoing theory for weak decays: • Further reductions in QCD errors? • Impact on Extra Dim scenarios ? • Implications of LHC results ? mn SUSY effects in weak decays PV Electron Scattering Muons SUSY: Observable E-dependence implies super heavy non-SM Higgs SUSY: Observable deviation could imply large slepton mass splittings • Q-Weak • 12 GeV Moller • PV DIS mn implications for NP in weak decays Vud & CKM Unitarity RM et al RM et al • gm-2 • mA!eA • Essential Role for Theory • Precise SM predictions (QCD) • Sensitivity to new physics & complementarity w/ LHC Reduced QCD error: Marciano & Sirlin Reduced QCD error: Cirigliano & Roselle Nuclei & Charged Leptons: Theory Weak Decays • n decay correlations • nuclear b decay • pion decays • muon decays

  40. 3/4 0 3/4 1 TWIST (TRIUMF) Muon Decay: Michel Parameters

  41. mn MPs Constraints on non-SM Higgs production at ILC: mn , m- and b-decay corr constrained by mn Also b-decay, Higgs production Erwin, Kile, Peng, R-M 06 Prezeau, Kurylov 05 First row CKM Correlations in Muon Decay & mn Model Independent Analysis 2005 Global fit: Gagliardi et al. Model Dependent Analysis

  42. p g Z m m Had VP Had LbL QED Weak SUSY Loops SM Loops Future goal Muon Anomalous Magnetic Moment ~ 3.4 s !

  43. Ongoing theory for gm-2: • Further reductions in had LBL uncertainty? • Impact on Extra Dim scenarios ? PV Electron Scattering p g Z Muons m m Had VP: Disp Rel & e+e- Lattice QCD (T Blum) • Q-Weak • 12 GeV Moller • PV DIS Had VP Had LbL QED Weak Had LBL: ChPT Hadronic Models Lattice QCD? Weak Decays • gm-2 • mA!eA • n decay correlations • nuclear b decay • pion decays • muon decays • Essential Role for Theory • Precise SM predictions (QCD) • Sensitivity to new physics & complementarity w/ LHC SUSY Loops: Sign of Higgsino mass Nuclei & Charged Leptons: Theory III

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