We report a measurement of the differential cross section d sigma = d(cos theta(t)) for top-quark pair production as a function of the top-quark production angle in proton-antiproton collisions at root s = 1.96 TeV. This measurement is performed using data collected with the CDF II detector at the Tevatron, corresponding to an integrated luminosity of 9.4 fb(-1). We employ the Legendre polynomials to characterize the shape of the differential cross section at the parton level. The observed Legendre coefficients are in good agreement with the prediction of the next-to-leading-order standard- model calculation, with the exception of an excess linear-term coefficient a(1) = 0.40 +/- 0.12, compared to the standard-model prediction of a(1) = 0.15(-0.03)(+0.07)

Measurement of the Differential Cross Section d sigma/d(cos theta(t)) for Top-Quark Pair Production in p(p)over-bar Collisions at root s = 1.96 TeV

MORELLO, MICHAEL JOSEPH;
2013

Abstract

We report a measurement of the differential cross section d sigma = d(cos theta(t)) for top-quark pair production as a function of the top-quark production angle in proton-antiproton collisions at root s = 1.96 TeV. This measurement is performed using data collected with the CDF II detector at the Tevatron, corresponding to an integrated luminosity of 9.4 fb(-1). We employ the Legendre polynomials to characterize the shape of the differential cross section at the parton level. The observed Legendre coefficients are in good agreement with the prediction of the next-to-leading-order standard- model calculation, with the exception of an excess linear-term coefficient a(1) = 0.40 +/- 0.12, compared to the standard-model prediction of a(1) = 0.15(-0.03)(+0.07)
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11384/38645
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 30
  • ???jsp.display-item.citation.isi??? 24
social impact