Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Evidence for s-channel single top quark production in pp¯ collisions at s=1.96 TeV
AU - Bertram, Iain
AU - Ratoff, Peter
AU - Borissov, Guennadi
AU - Fox, Harald
AU - D0 Collaboration
PY - 2013/11/4
Y1 - 2013/11/4
N2 - We present measurements of the cross sections for the two main production modes of single top quarksin pp¯ collisions at √s = 1.96 TeV in the Run II data collected with the D0 detector at the FermilabTevatron Collider, corresponding to an integrated luminosity of 9.7 fb−1. The s-channel cross section ismeasured to be σ(pp¯ →tb+ X)=1.10+0.33−0.31 pb with no assumptions on the value of the t-channel crosssection. Similarly, the t-channel cross section is measured to be σ(pp¯ →tqb + X) = 3.07+0.54−0.49 pb. Wealso measure the s+t combined cross section as σ(pp¯ →tb+X,tqb+X)=4.11+0.60−0.55 pb and set a lowerlimit on the CKM matrix element |Vtb|>0.92 at 95% C.L., assuming mt =172.5 GeV. The probability tomeasure a cross section for the s channel at the observed value or higher in the absence of signal is1.0×10−4, corresponding to a significance of 3.7 standard deviations.
AB - We present measurements of the cross sections for the two main production modes of single top quarksin pp¯ collisions at √s = 1.96 TeV in the Run II data collected with the D0 detector at the FermilabTevatron Collider, corresponding to an integrated luminosity of 9.7 fb−1. The s-channel cross section ismeasured to be σ(pp¯ →tb+ X)=1.10+0.33−0.31 pb with no assumptions on the value of the t-channel crosssection. Similarly, the t-channel cross section is measured to be σ(pp¯ →tqb + X) = 3.07+0.54−0.49 pb. Wealso measure the s+t combined cross section as σ(pp¯ →tb+X,tqb+X)=4.11+0.60−0.55 pb and set a lowerlimit on the CKM matrix element |Vtb|>0.92 at 95% C.L., assuming mt =172.5 GeV. The probability tomeasure a cross section for the s channel at the observed value or higher in the absence of signal is1.0×10−4, corresponding to a significance of 3.7 standard deviations.
U2 - 10.1016/j.physletb.2013.09.048
DO - 10.1016/j.physletb.2013.09.048
M3 - Journal article
VL - 726
SP - 656
EP - 664
JO - Physics Letters B
JF - Physics Letters B
SN - 0370-2693
IS - 4-5
ER -