Abazov, V. M. ; Mondal, N. K. ; et., al (2011) Direct measurement of the mass difference between top and antitop quarks Physical Review D - Particles, Fields, Gravitation and Cosmology, 84 (5). 052005_1-052005_18. ISSN 1550-7998
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Official URL: http://prd.aps.org/abstract/PRD/v84/i5/e052005
Related URL: http://dx.doi.org/10.1103/PhysRevD.84.052005
Abstract
We present a direct measurement of the mass difference between top and antitop quarks (Δm) in lepton+jets tt̅ final states using the “matrix element” method. The purity of the lepton+jets sample is enhanced for tt̅ events by identifying at least one of the jets as originating from a b quark. The analyzed data correspond to 3.6 fb-1 of pp̅ collisions at √s=1.96 TeV acquired by D0 in Run II of the Fermilab Tevatron Collider. The combination of the e+jets and μ+jets channels yields Δm=0.8±1.8(stat)±0.5(syst) GeV, which is in agreement with the standard model expectation of no mass difference.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 92380 |
| Deposited On: | 30 May 2012 09:23 |
| Last Modified: | 30 May 2012 09:23 |
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