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April 2004Ivo van Vulpen 1 MoriondCalor LSPLSB Ivo van Vulpen.

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Presentation on theme: "April 2004Ivo van Vulpen 1 MoriondCalor LSPLSB Ivo van Vulpen."— Presentation transcript:

1 April 2004Ivo van Vulpen 1 MoriondCalor LSPLSB Ivo van Vulpen

2 April 2004Ivo van Vulpen 2 Introduction: Moriond (Electroweak) La Thuile Calorimetry 2004 Perugia Real ‘hardware’ conference. Real ‘physics’ conference Disclaimer: Most of the sheets are taken directly from the talks given at Moriond.

3 April 2004Ivo van Vulpen 3 Small and very nice conference, but still: 90 talks ! EW results & precision measurements Searches and SUSY Dark matter Large extra dimensions Neutrinos B-physics Theory: Experiment: Discovery of new particles Discovery claim What is happening top quark mass, g-2, s in 2 (  w ) Babar & Bell + frustrating sheet Higgs at Tevatron Penta-quarks why and how can we seen it TALK

4 April 2004Ivo van Vulpen 4 top quark 8 sheets

5 April 2004Ivo van Vulpen 5 Top quark production  (tt)  8 pb g q q t t W b W b W->qq (2/3) and lv (1/3) WWbb productionFinal states bb qqqq bb qqlv bb lvlv Large QCD background Di-lepton. small statistics lepton + jets. Most sensitive

6 April 2004Ivo van Vulpen 6 Tevatron run 2: CDF di-lepton 6 events (0.5 background) Lepton + jets 22 events (6 background) 126/102 pb -1

7 April 2004Ivo van Vulpen 7 Tevatron run 2: D0 “First we have something to say on our run 1 result.”

8 April 2004Ivo van Vulpen 8 New D0 analysis technique: Tevatron run 1: D0 Use only 4 jet (clean) events (22 events instead of 77 previously) & all combinations Basically same as difference between: Can it be so important ?? Compute event-by-event probability Match measured 4-momenta to expectations for signal (m top = 170,175,180 etc) and background. YES!!

9 April 2004Ivo van Vulpen 9 91 events 22 events D0 l+jets (old) (new) As if you had 2.4 times more data M top moves up by  7 GeV !!! Tevatron run 1: D0 Improvement in statistical error is roughly 1.5 (comparable to 2.4 times more data) wow !! SAME DATA

10 April 2004Ivo van Vulpen 10 New top quark mass averages RUN2 (l+jets)TEVATRON RUN1 (old) RUN1 (new) M top moves up by +4.7 GeV D0 lepton + jets Influence on rest of EW physics results Tevatron

11 April 2004Ivo van Vulpen 11 Another example: Influence new top mass on tan(  ) exclusion region from LEP: In MSSM benchmarks: m top = 175 GeV mhmh  LEP-excluded tan(  ) region will shrink m h -max benchmark scenario FeynHiggs:  Computation of m h -max: Loop corrections  m 4 top higher order corr. ->  m h  3 GeV  m top  5 GeV ->  m h  5 GeV Maximum m h : in the MSSM  135 GeV hZ hA Scenario m h m A Excluded tan(  ) M h -max >91.0 > < tan(  ) < 2.4 LEP

12 April 2004Ivo van Vulpen 12 Impact new top mass on the electroweak fit Old (new): m h = 96 (117) GeV m h < 219 (251) 95% CL new old mhmh Example: W mass. contributions from:

13 April 2004Ivo van Vulpen 13 Electroweak g-2 4 sheets

14 April 2004Ivo van Vulpen 14 “Compare to SM prediction: there is a 1.4/2.7 sigma deviation” Anomalous magnetic moment of the muon g-2 collaboration final results Depends on e+e- data or tau data

15 April 2004Ivo van Vulpen 15 Theoretical computation of a  [ (g-2)/2] part (1) (1) light by light scattering: theory! Tedious work. Done by 1 guy basically. Sign flip found in 2002 (PhD student from Marseille ??)

16 April 2004Ivo van Vulpen 16 (2) Hadronic vacuum polarization: experiment (2 ways to extract it) Cannot be calculated (1) CMD: e+e- results: Claim 0.6% uncertainty, but new rad corr shifted cross section by 3% Region < 1.8 GeV dominates They were alone (check needed) Now confirmed by KLOE (radiative events). Maybe BaBar and Cleo can do something as well 1 (2) Tau decay Gives different e+e- -> hadrons

17 April 2004Ivo van Vulpen 17 FINAL

18 April 2004Ivo van Vulpen 18 Electroweak 4 sheets

19 April 2004Ivo van Vulpen 19 E = 48 GeV, Q 2 = 0.03 GeV 2 tree level:

20 April 2004Ivo van Vulpen 20 Still the old NuTeV ‘discrepancy’  A PV = -160  21  17 Significance of parity non- conservation is 6.3 sigma !! Translate to sin 2 (  w )

21 April 2004Ivo van Vulpen 21 clean events neutrino–nucleus deep inelastic scattering probe strange sea hadrons nucleus v and anti-v beam Measure sin 2  W through NC CC cross section ratio: NuTeV:

22 April 2004Ivo van Vulpen 22 Extracting sin 2 (  W ) from DIS cross sections: More precise corrections: (1) Z protons and N neutrons (3) Fermi-motion and nucleair binding effects from target (10 x experimental error)  (sin 2 (  W )) =  NuTeV (towards SM value) NuTeV shifts towards SM value (almost 1 sigma) ! Nuclear effects due to target corrections (2) QCD radiative corrections  (sin 2 (  W )) =  NuTeV (towards SM value) new

23 April 2004Ivo van Vulpen 23 4 sheets B-physics Babar/Belle

24 April 2004Ivo van Vulpen 24 2 odd things BABAR and Belle attacking the CKM matrix from all sides CP violation in B 0 ->  +  - Belle B->  K s 3.5  deviation from SM Do they agree on everything ?? Are there anomalies left ??

25 April 2004Ivo van Vulpen 25 Difference between J/  K s and  K s NP contributions to B 0  K s penguin can result in sin(2  ) J/  Ks  sin(2  )  Ks B 0  K s  penguin diagram Babar: sin(2  ) J/  Ks =0.73  0.06 : sin(2  )  Ks = 0.5  0.5 Belle: sin(2  )  Ks =-1.0  0.6 Jeroen van Hunen (NIKHEF) Belle B->  K s 3.5  deviation from SM sin(2  ) Old numbers Diff ! asymmetry  t decay time between tag-B and decay-B SM exp Measured 3.5 

26 April 2004Ivo van Vulpen 26 CP violation in B 0 ->  +  - Fit asymmetry to: No CP violation Excluded at 5.2  time SUMMARY (BABAR/Belle): doing well, some mysteries left. For no B ,B 0 and B 0 decays no CP –violation is observed (except Belle in B 0 ->  +  - )

27 April 2004Ivo van Vulpen 27 Most frustrating slide in the conference !! Quite a few talks on theoretical aspects of rare B decays as well. D0

28 April 2004Ivo van Vulpen 28 Higgs 1 sheet Tevatron running &

29 April 2004Ivo van Vulpen 29  Nothing new on the Higgs front & SUSY searches (updates from HERA, LEP, Tevatron)  Tevatron accelerator review: 4.4 fb -1 at FY 09 feasible 8.5 fb -1 at FY 09 very challenging SM cross section Excluded cross section Tevatron operation started bad, now ok Higgs cross section exclusion Expected Higgs boson mass exclusion Factor 50

30 April 2004Ivo van Vulpen 30 4 sheets Penta-quarks other new patricles &

31 April 2004Ivo van Vulpen 31 New particle ‘New’ particles are discovered all the time:

32 April 2004Ivo van Vulpen 32 New particle Could have seen it in Run1 I guess. Now studying decay properties. Seems like charmonium state. charmonium

33 April 2004Ivo van Vulpen 33 K + n-invariant mass Trying to understand the structure Pentaquarks:  + and  -- Penta-quark New particle m    50 Exp. Theory (3+2) m    50 P-wave

34 April 2004Ivo van Vulpen 34 New particle Penta-quark A 3 rd penta-quark ?? (NA49)  (1860) Not confirmed by CDF

35 April 2004Ivo van Vulpen 35 5 sheets Extra dimensions

36 April 2004Ivo van Vulpen 36 e.g. Randall-Sundrum Models Apparently I was not the only one who was surprised ! priorreality Many theory talks on this subject, a hot topic

37 April 2004Ivo van Vulpen 37

38 April 2004Ivo van Vulpen 38

39 April 2004Ivo van Vulpen 39 Tevatron (direct) and LEP (indirect) Depend on size dimension (like harmonic oscillator boundary conditions)

40 April 2004Ivo van Vulpen 40

41 April 2004Ivo van Vulpen sheets Dark matter

42 April 2004Ivo van Vulpen 42 Dark matter/energy Dark matter halo around galaxies What is dark matter ?? Axion WIMP (SUSY stable LSP,  1 0 )  matter >  baryon --> Non baryonic dark matter  total >  matter --> Dark Energy

43 April 2004Ivo van Vulpen 43 Assume WIMP = SUSY stable LSP Detecting WIMPS (1)

44 April 2004Ivo van Vulpen 44 Detecting WIMPS (2)

45 April 2004Ivo van Vulpen 45 WIMPS Sensitive underground detectors, but need large (mass * exposure time)

46 April 2004Ivo van Vulpen 46 WIMPS DAMA & Edelweiss

47 April 2004Ivo van Vulpen 47 DAMA at Moriond WIMPS

48 April 2004Ivo van Vulpen 48 DAMA at Moriond DAMA at CALOR Talks from DAMA 95% the same: They see something !!

49 April 2004Ivo van Vulpen 49

50 April 2004Ivo van Vulpen 50 EDELWEISS-I (Frejus, inonization-heat measurement, small) Plans: pb (now), (soon), (10 years)

51 April 2004Ivo van Vulpen 51 Axions  8 o, so shifts only at sunrise(set) 2005: Probe higher axion masses Interact with magnetic field (  B 2 L 2 ) and produce X-rays (a->  ) L=10 m, B = 9T 100 times more a->  conversions X ray telescope. (fill magnet with helium) can be produced in the sun. LHC magnet than any other experiment

52 April 2004Ivo van Vulpen 52 Other underground experiments: proton decayExplore lifetimes > years Ambitious: 100,000,000 kg liquid argon 74 sheets in 30 minutes Rubbia

53 April 2004Ivo van Vulpen 53 7 sheet Neutrinos

54 April 2004Ivo van Vulpen 54

55 April 2004Ivo van Vulpen 55 Mass eigenstates are mixture of flavour eigenstates (a la CKM matrix) AtmosphericSolar (KAMLAND)Reactor (CHOOZ) If  13  0 --> CP-violation 2-3 mixing1-3 mixing 1-2 mixing Superkamiokande  (m 23 ) 2 = 2-3 eV 2  23 = 45 o  (m 13 ) 2 = ??  (m 12 ) 2 = 5-7 eV 2 How do we probe the neutrino sector of the SM: MNS = Maki-Nakagawa-Sakata

56 April 2004Ivo van Vulpen 56 Super Kamiokande Is disappearance really caused by oscillations ?? 3.5sigma disfavored 2 allowed regions are compatible Do they really oscillate ??

57 April 2004Ivo van Vulpen 57 KARMEN excludes part of it (confirmation needed): --> miniBOONE Close to 4  Are there 3 families ?? Sterile neutrinos

58 April 2004Ivo van Vulpen 58 miniBOONE energy spectrum requires more precise cross section data miniBOONE will cross-check LSND result Depends on Tevatron programme Use identical targets at HARP Sensitivity n mu ->n e

59 April 2004Ivo van Vulpen 59 What about the absolute mass scale and hierarchy ?? We only know mass differences squared  (m 2 ) n -> p + e - + v m3 m2 m1m1 ? m3 m1 m2 Lepton number violation Neutrinoless double beta decay Klapdor-Kleingrothaus hep-ph/ Radon down factor 10 NEMO:

60 ciao I will leave CERN on the 1 st of June NL

61 April 2004Ivo van Vulpen 61


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