22-28 July 2010
Palais des Congrès de Paris
Europe/Paris timezone

Electroweak non-resonant corrections to e+ e- → W+ W- b bbar in the t tbar resonance region

23 Jul 2010, 10:10
18m
Salle Maillot ()

Salle Maillot

Parallel Session Talk 02 - The Standard Model and Electroweak Symmetry Breaking 02 - The Standard Model and Electroweak Symmetry Breaking

Speaker

Dr Pedro Ruiz-Femenia (RWTH Aachen University)

Description

We analyse subleading electroweak effects in the top anti-top resonance production region in e+ e- collisions which arise due to the decay of the top and anti-top quarks into the W+ W- b bbar final state. These are NLO corrections adopting the non-relativistic power counting v ~ alpha_s ~ sqrt(alpha_EW). In contrast to the QCD corrections which have been calculated (almost) up to NNNLO, the parametrically larger NLO electroweak contributions have not been completely known so far, but are mandatory for the required accuracy at a future linear collider. The missing parts of these NLO contributions arise from off-shell top production and decay and other non-resonant irreducible background processes to t tbar production. We consider the total cross section of the e+ e- → W+ W- b bbar process and additionally implement cuts on the invariant masses of the W+ b and W- bbar pairs.

Primary authors

Dr Bernd Jantzen (RWTH Aachen University) Prof. Martin Beneke (RWTH Aachen University) Dr Pedro Ruiz-Femenia (RWTH Aachen University)

Presentation Materials

Your browser is out of date!

Update your browser to view this website correctly. Update my browser now

×