Rencontre des Particules 2008

Session

Contraintes sur la nouvelle physique

23 Jan 2008, 09:30

Auditorium LAPP/LAPTH (LAPTH Annecy-le-Vieux)

Conveners

Contraintes sur la nouvelle physique

• Sacha Davidson (IPN Lyon)

0. Résultats récents du Tevatron

Patrice Verdier (IPN Lyon)

23/01/2008, 09:30

1. Vtb measurement from the single top production

Emi Kou (LPT Orsay)

23/01/2008, 10:15

The strongest constraint on Vtb presently comes from the 3 x 3 unitarity of the CKM matrix, which fixes Vtb to be very close to one. If the unitarity is relaxed, current information from top production at Tevatron still leaves open the possibility that Vtb is sizably smaller than one. In minimal extensions of the standard model with extra heavy quarks, the unitarity constraints are much weaker...

33. Neutron scattering and extra interactions in the range between 1 pm and 5 nm

Guillaume Pignol (LPSC Grenoble)

23/01/2008, 10:35

Scattering of slow neutrons at nuclei results from very weak interaction: electromagnetism is nearly absent because of electrical neutrality of neutrons, and nuclear interaction is effectively weak because of its short range. Thus, available neutron scattering data appear to be sensitive to new interactions beyond the standard model. I will show that constraints on new short-range interactions...