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Search for pair production of scalar top quarks decaying to a tau lepton and a b quark in 1.96 TeV ppbar collisions
| 题名： | Search for pair production of scalar top quarks decaying to a tau lepton and a b quark in 1.96 TeV ppbar collisions |
| 作者： | /Texas A-M;Khotilovich, Vadim, G.; |
| 关键词： | Experiment-HEP72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; B QUARKS; BRANCHING RATIO; CROSS SECTIONS; DECAY; ELECTRONS; FERMILAB COLLIDER DETECTOR; LEPTONS; MUONS; PAIR PRODUCTION; SCALARS; STANDARD MODEL; T QUARKS; TAU PARTICLES |
| 摘要： | I present the results of a search for pair production of scalar top quarks ({tilde t}{sub 1}) in an R-parity violating supersymmetric scenario using 322 pb{sup -1} of p{bar p} collisions at {radical}s = 1.96 TeV collected by the upgraded Collider Detector at Fermilab. I assume each {tilde t}{sub 1} decays into a {tau} lepton and a b quark, with branching ratio {beta}, and search for final states containing either an electron or a muon from a leptonic {tau} decay, a hadronically decaying {tau} lepton, and two or more jets. Two candidate events pass my final selection criteria, consistent with the expectation from standard model processes. I present upper limits on the cross section times branching ratio squared {sigma}({tilde t}{sub 1}{bar {tilde t}}{sub 1}) x {beta}{sup 2} as a function of the stop mass m({tilde t}{sub 1}). Assuming {beta} = 1, I set a 95%confidence level limit m({tilde t}{sub 1}) > 153 GeV=c{sup 2}. These limits are also fully applicable to the case of a pair produced third generation scalar leptoquark that decays into a {tau} lepton and a b quark. |
| 总页数： | 190pages |
| 报告类型： | 科技报告 |
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