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Title: Search for Admixture of Scalar Top in the t$$\bar{t}$$ Lepton+Jets Final State at √s= 1.96 TeV

Abstract

A search for pair production of scalar top (stop) quarks has been performed in the lepton+jets channel in ~ 1 fb -1 of data at the D0 experiment. Kinematic differences between $$\bar{t}$$ 1$$\tilde{t}$$ 1 and the dominant t$$\bar{t}$$ process are used to separate the two reactions. For stop-quark masses of 145-175 GeV, and chargino masses of 105-135 GeV, to which the stop quarks decay ($$\tilde{t}$$ 1 → $$\tilde{X}$$ 1 +b), we obtain upper limits on the $$\tilde{t}$$ 1$$\bar{t}$$ 1 cross section at 95% confidence, that are a factor of ~ 7-12 larger than expected from the Minimal Supersymmetric Standard Model (MSSM), as calculated in a next-to-leading-order (NLO) approximation in quantum chromodynamics (QCD).

Authors:
 [1]
  1. Univ. of Rochester, NY (United States)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
921978
Report Number(s):
FERMILAB-THESIS-2007-45
TRN: US0801048
DOE Contract Number:
AC02-07CH11359
Resource Type:
Thesis/Dissertation
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; APPROXIMATIONS; CROSS SECTIONS; DECAY; PAIR PRODUCTION; QUANTUM CHROMODYNAMICS; QUARKS; SCALARS; STANDARD MODEL; Experiment-HEP

Citation Formats

Park, Su-Jung. Search for Admixture of Scalar Top in the t$\bar{t}$ Lepton+Jets Final State at √s= 1.96 TeV. United States: N. p., 2007. Web. doi:10.2172/921978.
Park, Su-Jung. Search for Admixture of Scalar Top in the t$\bar{t}$ Lepton+Jets Final State at √s= 1.96 TeV. United States. doi:10.2172/921978.
Park, Su-Jung. Mon . "Search for Admixture of Scalar Top in the t$\bar{t}$ Lepton+Jets Final State at √s= 1.96 TeV". United States. doi:10.2172/921978. https://www.osti.gov/servlets/purl/921978.
@article{osti_921978,
title = {Search for Admixture of Scalar Top in the t$\bar{t}$ Lepton+Jets Final State at √s= 1.96 TeV},
author = {Park, Su-Jung},
abstractNote = {A search for pair production of scalar top (stop) quarks has been performed in the lepton+jets channel in ~ 1 fb-1 of data at the D0 experiment. Kinematic differences between $\bar{t}$1$\tilde{t}$1 and the dominant t$\bar{t}$ process are used to separate the two reactions. For stop-quark masses of 145-175 GeV, and chargino masses of 105-135 GeV, to which the stop quarks decay ($\tilde{t}$1 → $\tilde{X}$1+b), we obtain upper limits on the $\tilde{t}$1$\bar{t}$1 cross section at 95% confidence, that are a factor of ~ 7-12 larger than expected from the Minimal Supersymmetric Standard Model (MSSM), as calculated in a next-to-leading-order (NLO) approximation in quantum chromodynamics (QCD).},
doi = {10.2172/921978},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}

Thesis/Dissertation:
Other availability
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