# First Measurement of the tt̅ Differential Cross Section dσ/dMtt̅ in pp̅ Collisions at √s=1.96  TeV

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http://hdl.handle.net/10138/24408

#### Citation

Aaltonen , T , Mehtälä , P , Orava , R , Mäki , T , Saarikko , H , Österberg , K & CDF Collaboration 2009 , ' First Measurement of the tt̅ Differential Cross Section dσ/dMtt̅ in pp̅ Collisions at √s=1.96  TeV ' , Physical Review Letters , vol. 102 , no. 22 , pp. 222003 . https://doi.org/10.1103/PhysRevLett.102.222003

 Title: First Measurement of the tt̅ Differential Cross Section dσ/dMtt̅ in pp̅ Collisions at √s=1.96  TeV Author: Aaltonen, Timo; Mehtälä, Petteri; Orava, Risto; Mäki, Tuula; Saarikko, Heimo; Österberg, Kenneth; CDF Collaboration Contributor: University of Helsinki, Helsinki Institute of PhysicsUniversity of Helsinki, Helsinki Institute of PhysicsUniversity of Helsinki, Helsinki Institute of PhysicsUniversity of Helsinki, Helsinki Institute of PhysicsUniversity of Helsinki, Department of PhysicsUniversity of Helsinki, Department of Physics Date: 2009 Language: eng Number of pages: 8 Belongs to series: Physical Review Letters ISSN: 0031-9007 URI: http://hdl.handle.net/10138/24408 Abstract: We present a measurement of the $\ttbar$ differential cross section with respect to the $\ttbar$ invariant mass, dSigma/dMttbar, in $\ppbar$ collisions at $\sqrt{s}=1.96$ TeV using an integrated luminosity of $2.7\invfb$ collected by the CDF II experiment. The $\ttbar$ invariant mass spectrum is sensitive to a variety of exotic particles decaying into $\ttbar$ pairs. The result is consistent with the standard model expectation, as modeled by \texttt{PYTHIA} with \texttt{CTEQ5L} parton distribution functions. Subject: 114 Physical sciences Rights:
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