arXiv subjects

Adam Biernacik

Publications and source records attributed to Adam Biernacik.

3 recordsLinked to original sources

arXiv2005

Towards high precision predictions for top quark pair production and decay at a linear collider

We report on the progress in work on improving precision of the standard model theoretical predictions for the top quark pair production and decay into six fermions at a linear collider. Two programs have been combined into a single Monte Carlo program: 'eett6f', a MC program for e+e- -> 6f, and 'topfit', a program for electroweak radiative corrections to e+e- -> t\bar t. The MC program is described and preliminary numerical results are shown.

hep-ph↗

arXiv2002

Top quark pair production and decay at linear colliders: signal vs. off resonance background

Standard Model predictions for the reactions with six fermions in the final state relevant for top quark pair production and decay at linear colliders are discussed. An issue of the double resonance signal versus non doubly resonant background is addresed. Effects related to the off-mass-shell production of the t\bar{t}-pair are discussed.

hep-ph↗

arXiv2001

Top quark production in e+e- annihilation

We analyze the four-fermion reactions e+e- -> 4f containing a single top quark and three other fermions, a possible decay product of the resonant anti-top quark, in the final state. This allows us to estimate the contribution of the nonresonant Feynman graphs and effects related to the off mass shell production and decay of the top quark. We test the sensitivity of the total cross section at centre of mass energies in the t tbar threshold region and far above it to the variation of the top quark width. We perform calculation in an arbitrary linear gauge in the framework of the Standard Model and discuss an important issue of gauge symmetry violation by the constant top quark width.

hep-ph↗