Papers › Analytical solution of ttbar dilepton equations

Analytical solution of ttbar dilepton equations

1 Mar 2006arXiv:hep-ph/0603011links table onlyarchive 2025-07-28

Lars Sonnenschein

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The top quark antiquark production system in the dilepton decay channel is described by a set of equations which is nonlinear in the unknown neutrino momenta. Its most precise and least time consuming solution is of major importance for measurements of top quark properties like the top quark mass and tt̅ spin correlations. The initial system of equations can be transformed into two polynomial equations with two unknowns by means of elementary algebraic operations. These two polynomials of multidegree two can be reduced to one univariate polynomial of degree four by means of resultants. The obtained quartic equation is solved analytically.

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