Diphoton production at NNLO - the main background for Higgs boson searches

por Leandro Cieri (INFN Firenze)

martes 16 oct. 2012 12:00 → 13:00 Europe/Madrid

Sala Seminarios IFIC (Edf. Institutos de Investigación)

Diphoton production is the main background in searches and studies for a low mass Higgs boson, decaying in a pair of photons. Due to current searches and studies at the LHC, it is desirable to count with the best theoretical tool to describe this background. In this talk we'll present the details behind the calculation, which is based on the transverse momentum subtraction formalism and we'll show different results obtained using a code that calculates diphoton production at NNLO in perturbative QCD. We'll talk about the comparison with the LHC data and Tevatron data, and we'll discuss why the NNLO is necessary to understand the phenomenology of this process.