Search for New Physics in Rare Top Decays: ttˉt \bar t Spin Correlations and Other Observables

Jul 7, 2014
14 pages
Published in:
  • Phys.Rev.D 90 (2014) 9, 094015
  • Published: Nov 14, 2014
e-Print:
Report number:
  • UDEM-GPP-TH-14-233

Citations per year

201420162018202020221320
Abstract: (APS)

In this paper we study new-physics contributions to the top-quark decay tbb¯c. We search for ways of detecting such new physics via measurements at the LHC. As top quarks are mainly produced at the LHC in tt¯ production via gluon fusion, we analyze the process ggtt¯(bb¯c)(b¯ν¯). We find six observables that can be used to reveal the presence of new physics in tbb¯c. Three are invariant mass-squared distributions involving two of the final-state particles in the top decay, and three are angular correlations between the final-state quarks coming from the t decay and the - coming from the t¯ decay. The angular correlations are related to the tt¯ spin correlation.

Note:
  • Published version
  • 14.65.Ha
  • new physics: search for
  • CERN LHC Coll
  • p p: scattering
  • gluon gluon: fusion
  • top: pair production
  • top: rare decay
  • top: spin
  • spin: correlation
  • gluon gluon --> top anti-top