Portoroz 2013: Probing the Standard Model and New Physics at Low and High Energies

Session

Top quark I

16 Apr 2013, 16:55

James Cook (Portoroz, Slovenia)

46. Reconciliation of Tevatron A_fb and LHC A_C with s-channel and t-channel NP

Jure Drobnak (TUM, IJS)

16/04/2013, 16:55

Since the measured value of A_C at LHC seems to be compatible with the SM predicted value, many considered explanations of the anomalous A_FB measured at Tevatron fail to appropriately accommodate the experimental A_C value. In the talk I will present two distinct ways of reconciling the two measurements using new physics in t-tbar production. One includes an axi-gluon exchange in the...

0. The Top-Quark Charge Asymmetry with a Jet Handle

Susanne Westhoff (University of Pittsburgh, PITT-PACC)

16/04/2013, 17:17

Top-quark physics provides us with a portal to potential physics beyond the standard model. To date, the only evidence of an anomaly in top-quark physics is the large charge asymmetry observed at the Tevatron. Shedding light on this anomaly by measuring a charge asymmetry at the LHC, however, is a difficult endeavor. I will discuss the prospects to observe a charge asymmetry in top-antitop...

26. t tbar charge asymmetry, family and friends

Juan Antonio Aguilar Saavedra (University of Granada, University of Coimbra, LIP and IFCA)

16/04/2013, 17:39

We present the current status of the Tevatron charge asymmetry and its sister asymmetry at the LHC. The relation between both is elucidated, using as framework the collider-independent asymmetries they originate from. Other related observables, such as the t tbar differential distribution and top polarisation, are also discussed.

14. The charming stop

Monika Blanke

16/04/2013, 18:01

While the presence of top partners below the TeV scale is predicted by naturalness, the search at ATLAS and CMS for these states has so far been unsuccessful. Focussing on supersymmetry, we show that a large mixing between the right-handed charm and top squarks (i) is allowed by low-energy flavour constraints; (ii) reduces the experimental bound on the stop mass; (iii) has a mild, but...