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254 results on '"Lehto, M H."'

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1. A measurement of the QCD colour factor ratiosC A /C F andT F /C F from angular correlations in four-jet events

2. Measurement of the tau lepton polarization and its forward-backward asymmetry from Z0 decays

3. Measurement of $$\Gamma (Z^0 \to b\bar b)/\Gamma (Z^0 \to hadrons)$$ using a double tagging method

4. Measurement of single photon production in e+e− collisions near the Z0 resonance

5. Determination of event shape distributions and α s b from $$Z^0 \to b\bar b$$ events at LEP

6. A study of mean sub-jet multiplicities in two- and three-jet hadronicZ 0 decays

7. Measurement of $$\Gamma (Z^0 \to b\bar b)/\Gamma (Z^0 \to hadrons)$$ using impact parameters and leptons

8. Measurement of the photon structure functionF 2 γ in the reactione + e −→e + e −+hadrons at LEP

9. Measurement of the production rates of charged hadrons ine + e −-annihilation at theZ 0

10. Studies of charged particle multiplicity inb quark events

11. QCD studies using a cone-based jet finding algorithm fore + e − collisons at LEP

12. Improved measurements of the neutral current from hadron and lepton production at LEP

13. Search for neutral Higgs bosons in the minimal supersymmetric extension of the standard model

14. A study of muon pair production and evidence for tau pair production in photon-photon collisions at LEP

15. A measurement ofΓ (Z 0→b $$\Gamma ({\rm Z}^0 \to b\bar b)$$ /Γ(Z 0→hadrons) using an impact parameter technique

16. Measurement of $$\Gamma ({\rm Z}^0 \to b\bar b)/\Gamma ({\rm Z}^0 \to hadrons)$$ using leptons

17. A measurement of the forward-backward asymmetry of $$e^ + e^ - \to b\bar b$$ at centre of mass energies on and near theZ 0 peak usingD *± mesons

18. Studies of strong and electroweak interactions using final state photon emission in hadronicZ 0 decays

19. A study of differences between quark and gluon jets using vertex tagging of quark jets

20. A test of the flavour independence of the strong interaction for five flavours

21. Measurement of the averageb hadron lifetime inZ 0 decays

22. Measurements of $${{\Gamma (Z^0 \to b\bar b)} \mathord{\left/ {\vphantom {{\Gamma (Z^0 \to b\bar b)} {\Gamma (Z^0 \to hadrons)}}} \right. \kern-\nulldelimiterspace} {\Gamma (Z^0 \to hadrons)}}$$ and semileptonic branching ratios forb-flavoured hadrons in hadronicZ 0 decays

23. Precision measurements of the neutral current from hadron and lepton production at LEP

24. Measurement of the τ lifetime

25. QCD coherence studies using two particle azimuthal correlations

26. The forward-backward asymmetry of $$e^ + e^ - \to b\bar b and e^ + e^ - \to c\bar c$$ using leptons in hadronicZ 0 decays

27. A determination ofα s( $$M_{Z^0 } $$ ) at LEP using resummed QCD calculations

28. A study of charged particle multiplicities in hadronic decays of theZ 0

29. Inclusive neutral vector meson production in hadronicZ 0 decays

30. Properties of multihadronic events with a final state photon at $$\sqrt s = M_{Z^0 } $$

31. A measurement of electron production in hadronicZ 0 decays and a determination of $$\Gamma (Z^0 \to b\bar b)$$

32. A global determination of $$\alpha _s (M_{Z^0 } )$$ at LEP

33. A study of the recombination scheme dependence of jet production rates and of α s ( $$M_{Z^0 } $$ ) in hadronicZ 0 decays

34. A direct measurement of theZ 0 invisible width by single photon counting

35. Measurement of theZ 0 line shape parameters and the electroweak couplings of charged leptons

36. A study of angular correlations in 4-jet final states of hadronicZ 0 decays

37. Searches for neutral Higgs bosons ine + e − collisions at LEP

38. Determination of ${\rm |V_{ub}|}$ from the measurement of the inclusive charmless semileptonic branching ratio of b hadrons

39. Searches for Neutral Higgs Bosons in e+e- Collisions at LEP

40. A Study of Heavy Flavour Production using Muons in Hadronic Z0 Decays

41. Analysis of Z0 Couplings to Charged Leptons

42. A Study of Angular Correlations in 4-jet Final States of Hadronic Z0 Decays

43. A Direct Measurement of the Z0 Invisible Width by Single Photon Counting

44. Intermittency in Hadronic Decays of the Z0

45. A Measurement of Energy Correlations and a Determination of αs(M2Z0) e+e- Annihilations at √s=91 GeV

46. A Study of the Recombination Scheme Dependence of Jet Production Rates and of αs( MZ0) in Hadronic Z0 Decays

47. A Model Independent Observation of the String Effect using Quark Tagging at LEP

48. A Direct Search for Neutralino Production at LEP

49. Improved measurement of the $B^0_d$ - $\overline{B}^0_d$ oscillation frequency

50. Measurement of the τ topological branching ratios at LEP

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