By Alexander Grohsjean

The most sensible quark, found in 1995 on the Fermilab Tevatron Collider, is the heaviest identified hassle-free particle. definitely the right wisdom of its mass yields vital constraints at the mass of the as-yet-undiscovered Higgs boson and permits one to explore for physics past the normal version. With a superb edition of a unique dimension process, defined and utilized the following for the 1st time, the sensitivity to the pinnacle quark mass within the dilepton ultimate kingdom on the D0 test can be superior through greater than 30%. in addition, an extension to the strategy is gifted which permits destiny measurements to noticeably lessen the most proscribing systematic uncertainty.

**Read Online or Download Measurement of the Top Quark Mass in the Dilepton Final State Using the Matrix Element Method PDF**

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**Measurement of the Top Quark Mass in the Dilepton Final State Using the Matrix Element Method**

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**Extra info for Measurement of the Top Quark Mass in the Dilepton Final State Using the Matrix Element Method**

**Example text**

The partonic cross section r perturbatively using the factorization lF and the renormalization scale lR. The formation of the final-state particles cannot be calculated in perturbation theory, but again is independent of the hard interaction 36 4 The Top Quark and the Concept of Mass Fig. 3 CTEQ6L1 parametrization of the parton distribution functions depending on the momentum fraction e of the parton. 8 1 t g (a) q t g t g t g t g t g t g t (b) Fig. 4 The leading-order Feynman diagrams for the production of top quark pairs at a hadron collider [12].

Habilitationsschrift, LudwigMaximilians-UniversitätMünchen 13. Kidionakis N et al (2003) Next-to-next-to-leading order soft-gluon corrections in top quark hadroproduction. Phys Rev D 68:114014 14. Kidionakis N et al (2006) Single top quark production at the FermilabTevatron: threshold resummation and finite-order soft gluon corrections. Phys Rev D 74:114012 15. Amsler C et al (Particle Data Group) (2008) The review of particle physics. Phys Lett B 667:1 16. The DØ collaboration. html 17. Newton I (1687) The Principia: mathematical principles of natural philosophy.

Similarly, the calorimeter-based isolation is defined as ecal halo ¼ X 1 Ecell ; l pT 0:1\DR\0:4 T ð3:4Þ where the sum is over individual calorimeter cells. 15. Cosmic ray muons are rejected by requiring a timing window of 10 ns for all hits in the scintillator starting at the expected time of arrival from the hard interaction point. If any hit in the three layers lies outside this window, a muon is tagged as cosmic. As for electrons, the simulated resolution of muons is different from the measured one and an additional smearing is applied to the simulated data [9].