Search for admixture of scalar top quarks in the t anti-t lepton+jets final state at s**(1/2) = 1.96-TeV

Journal Article · Thu Jan 01 00:00:00 EST 2009 · Phys.Lett.B674:4-10,2009

DOI:https://doi.org/10.1016/j.physletb.2009.02.027· OSTI ID:948201

Abazov, V M; Abbott, B; Abolins, M; Acharya, B S; Adams, M; Adams, T; Aguilo, Ernest; Ahsan, M; Alexeev, G D; Alkhazov, G; Alton, A

A search for pair production of the lightest supersymmetric partner of the top quark, {tilde t}{sub 1}, is performed in the lepton+jets channel using 0.9 fb{sup -1} of data collected by the D0 experiment. Kinematic differences between {tilde t}{sub 1}{bar {tilde t}}{sub 1} and the dominant top quark pair production background are used to separate the two processes. First limits from Run II of the Fermilab Tevatron Collider for the scalar top quark decaying to a chargino and a b quark ({tilde t}{sub 1} {yields} {tilde {chi}}{sub 1}{sup +} b) are obtained for scalar top quark masses of 130-190 GeV and chargino masses of 90-150 GeV.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 948201
• Report Number(s): FERMILAB-PUB-09-005-E; arXiv eprint number arXiv:0901.1063; TRN: US0901604
• Journal Information: Phys.Lett.B674:4-10,2009, Journal Name: Phys.Lett.B674:4-10,2009
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B QUARKS
FERMILAB TEVATRON
PAIR PRODUCTION
SCALARS
T QUARKS
Experiment-HEP