Sharpening the shape analysis for higher-dimensional operator searches

Autor(es)

Fichet, Sylvain ; Tonero, Alberto ; Teles, Patricia Rebello

• Tipo de documento: Artigo Científico
• Fonte: PHYSICAL REVIEW D; v. 96, n. 3, p. 13-pg., 2017-08-03.

Resumo

When the Standard Model is interpreted as the renormalizable sector of a low-energy effective theory, the effects of new physics are encoded into a set of higher-dimensional operators. These operators potentially deform the shapes of Standard Model differential distributions of final states observable at colliders. We describe a simple and systematic method to obtain optimal estimations of these deformations when using numerical tools, like Monte Carlo simulations. A crucial aspect of this method is minimization of the estimation uncertainty: We demonstrate how the operator coefficients have to be set in the simulations in order to get optimal results. The uncertainty on the interference term turns out to be the most difficult to control and grows very quickly when the interference is suppressed. We exemplify our method by computing the deformations induced by the O-3W operator in W+W- production at the LHC, and by deriving a bound on O-3W using 8 TeV CMS data. (AU)

• Processo FAPESP: 13/02404-1 - Phenomenologia do Large Hadron Collider
• Beneficiário: Alberto Tonero
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 11/11973-4 - ICTP Instituto Sul-Americano para Pesquisa Fundamental: um centro regional para física teórica
• Beneficiário: Nathan Jacob Berkovits
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 14/21477-2 - Física de partículas na escala electro-fraca: modelos e interpretações
• Beneficiário: Sylvain Pierre Joseph Fichet
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado