TY - JOUR

T1 - Search for pair production of light scalar top quarks in p anti-p collisions at sqrt {s}=1.8 TeV.

AU - D0 Collaboration, The

AU - Bertram, I. A.

PY - 2004/6/29

Y1 - 2004/6/29

N2 - Using 85.2±3.6 pb-1 of pp̅ collisions collected at sqrt[s]=1.8 TeV with the D0 detector at Fermilab’s Tevatron Collider, we present the results of a search for direct pair production of scalar top quarks (t˜), the supersymmetric partners of the top quark. We examined events containing two or more jets and missing transverse energy, the signature of light scalar top quark decays to charm quarks and neutralinos. After selections, we observe 27 events while expecting 31.1±6.4 events from known standard model processes. Comparing these results to next-to-leading-order production cross sections, we exclude a significant region of t˜ and neutralino phase space. In particular, we exclude the t˜ mass mt˜<122 GeV/c2 for a neutralino mass of 45 GeV/c2.

AB - Using 85.2±3.6 pb-1 of pp̅ collisions collected at sqrt[s]=1.8 TeV with the D0 detector at Fermilab’s Tevatron Collider, we present the results of a search for direct pair production of scalar top quarks (t˜), the supersymmetric partners of the top quark. We examined events containing two or more jets and missing transverse energy, the signature of light scalar top quark decays to charm quarks and neutralinos. After selections, we observe 27 events while expecting 31.1±6.4 events from known standard model processes. Comparing these results to next-to-leading-order production cross sections, we exclude a significant region of t˜ and neutralino phase space. In particular, we exclude the t˜ mass mt˜<122 GeV/c2 for a neutralino mass of 45 GeV/c2.

U2 - 10.1103/PhysRevLett.93.011801

DO - 10.1103/PhysRevLett.93.011801

M3 - Journal article

VL - 93

SP - 011801

JO - Physical review letters

JF - Physical review letters

SN - 1079-7114

IS - 1

ER -