First Measurement of the tt¯ Differential Cross Section dσ/dMtt¯ in pp¯ Collisions at s=1.96TeV

T. Aaltonen et al. (CDF Collaboration)
Phys. Rev. Lett. 102, 222003 – Published 5 June 2009

Abstract

We present a measurement of the tt¯ differential cross section with respect to the tt¯ invariant mass, dσ/dMtt¯, in pp¯ collisions at s=1.96TeV using an integrated luminosity of 2.7fb1 collected by the CDF II experiment. The tt¯ invariant mass spectrum is sensitive to a variety of exotic particles decaying into tt¯ pairs. The result is consistent with the standard model expectation, as modeled by PYTHIA with CTEQ5L parton distribution functions.

  • Figure
  • Received 16 March 2009

DOI:https://doi.org/10.1103/PhysRevLett.102.222003

©2009 American Physical Society

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Vol. 102, Iss. 22 — 5 June 2009

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