Maximizing spin correlations in top quark pair production at the Tevatron

Gregory Mahlon, Stephen Parke

Research output: Contribution to journalArticlepeer-review

160 Scopus citations


A comparison is made between the off-diagonal and helicity spin bases for top quark pair production at the FNAL Tevatron. In the off-diagonal basis, 92% of the top quark pairs are in the spin configuration up-down plus down-up, whereas in the helicity basis only 70% are left-right plus right-left. The off-diagonal basis maximizes the spin asymmetry and hence the measured angular correlations between the decay products, which are more than twice as big in this basis as compared to the helicity basis. In addition, for the process qq̄ → tt̄, we give a very simple analytic expression for the matrix element squared which includes all spin correlations between the production and subsequent decay of the top quarks.

Original languageEnglish (US)
Pages (from-to)173-179
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1-2
StatePublished - Oct 9 1997

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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