MEASUREMENT OF TOP QUARK PAIR PRODUCTION CROSS SECTION IN PROTON ANTIPROTON COLLISIONS AT √s = 1.96 TeV IN THE τ + jets FINAL STATE USING 1 fb<sup>-1</sup> OF DATA
| dc.contributor.advisor | Gutierrez, Phillip | |
| dc.creator | Hossain, Sohrab | |
| dc.date.accessioned | 2019-06-05T21:20:03Z | |
| dc.date.available | 2019-06-05T21:20:03Z | |
| dc.date.issued | 2009 | |
| dc.description.abstract | This dissertation presents a new measurement of p_p &rarr; t_t X | |
| dc.description.abstract | production at &radic;s = 1.96 TeV using 974.2 pb<sup>-1</sup> of data collected with the | |
| dc.description.abstract | D&Oslash; detector between 2002 and 2006. We focus on the final state | |
| dc.description.abstract | where the W boson from one of the top quarks decays into a | |
| dc.description.abstract | &tau; lepton and its associated neutrino, while the other W boson decays into | |
| dc.description.abstract | a quark-antiquark pair. We aim to select those events in which the | |
| dc.description.abstract | &tau; lepton subsequently decays hadronically, meaning to one or three charged | |
| dc.description.abstract | hadrons, zero or more neutral hadrons and a tau neutrino (the charge conjugate | |
| dc.description.abstract | processes are implied in all of the above). The observable signature | |
| dc.description.abstract | thus consists of a narrow calorimeter shower with associated track(s) | |
| dc.description.abstract | characteristic of a hadronic tau decay, four or more jets, of which | |
| dc.description.abstract | two are initiated by b quarks accompanying the W\'s in the top quark | |
| dc.description.abstract | decays, and a large net missing momentum in the transverse plane due to | |
| dc.description.abstract | the energetic neutrino-antineutrino pair that leave no trace in the | |
| dc.description.abstract | detector media. The preliminary result for the measured cross section is:</dcvalue>\n <dcvalue element="description" qualifier="abstract"/>\n <dcvalue element="description" qualifier="abstract"/>\n <dcvalue element="description" qualifier="abstract">&sigma;(t_t) = 6.9 <sup>+1.2</sup>-1.2 (stat)<sup>+0.8</sup> -0.7 (syst) &plusmn; | |
| dc.description.abstract | 0.4 (lumi) pb | |
| dc.description.abstract | This indicates that our finding is consistent with the Standard Model | |
| dc.description.abstract | prediction. | |
| dc.format.extent | 153 pages | |
| dc.format.medium | application.pdf | |
| dc.identifier | 99327742102042 | |
| dc.identifier.uri | https://hdl.handle.net/11244/320306 | |
| dc.language | en_US | |
| dc.relation.requires | Adobe Acrobat Reader | |
| dc.subject | Standard model (Nuclear physics) | |
| dc.subject | Quarks | |
| dc.subject | Particle accelerators | |
| dc.subject | Collisions (Nuclear physics) | |
| dc.subject | Proton-antiproton interactions | |
| dc.thesis.degree | Ph.D. | |
| dc.title | MEASUREMENT OF TOP QUARK PAIR PRODUCTION CROSS SECTION IN PROTON ANTIPROTON COLLISIONS AT √s = 1.96 TeV IN THE τ + jets FINAL STATE USING 1 fb<sup>-1</sup> OF DATA | |
| dc.type | text | |
| dc.type | document | |
| ou.group | College of Arts and Sciences::Homer L. Dodge Department of Physics and Astronomy |
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