Searching for New Physics in Scalar Top-Pair Resonance - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2016

Searching for New Physics in Scalar Top-Pair Resonance

Jérémie Quevillon

Résumé

We consider the effects in the production via gluon fusion in LHC collisions of one or two spin-zero new resonant particles $\Phi$ that decay into a top quark pair. We revisit previous analyses of the interferences between the heavy-fermion loop-induced $gg \rightarrow \Phi \rightarrow t\bar{t}$ signal and the continuum QCD background $gg \rightarrow t\bar{t}$. We show that in the presence of standard model fermions only in the $gg \rightarrow \Phi$ loops, the interference effect is destructive causing a dip in the $t \bar t$ mass distribution. Including New Physics such as additional vector-like quarks leads to a totally different picture as the line-shape can be distorted by peaks and dips. For the time being, the absence of such effects in ATLAS and CMS data constrain models of the production and decays of the $\Phi$ state(s).

Dates et versions

hal-02908308 , version 1 (28-07-2020)

Identifiants

Citer

Jérémie Quevillon. Searching for New Physics in Scalar Top-Pair Resonance. 9th International Workshop on Top Quark Physics (TOP 2016), Sep 2016, Olomouc, Czech Republic. 7 p. ⟨hal-02908308⟩
8 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More