Searches for heavy diboson resonances in pp collisions at s√=13 TeV with the ATLAS detector

H. WAHLBERG Y ATLAS COLLABORATION

JOURNAL OF HIGH ENERGY PHYSICS - (Online)

SISSA

Año: 2016

1029-8479

Searches for new heavy resonances decaying to WW, WZ, and ZZ √ bosons are presented,using a data sample corresponding to 3.2 fb −1 of pp collisions at s = 13 TeV collectedwith the ATLAS detector at the CERN Large Hadron Collider. Analyses selecting ννqq,`νqq, ``qq and qqqq final states are combined, searching for a narrow-width resonance withmass between 500 and 3000 GeV. The discriminating variable is either an invariant massor a transverse mass. No significant deviations from the Standard Model predictions areobserved. Three benchmark models are tested: a model predicting the existence of a newheavy scalar singlet, a simplified model predicting a heavy vector-boson triplet, and a bulkRandall-Sundrum model with a heavy spin-2 graviton. Cross-section limits are set at the95% confidence level and are compared to theoretical cross-section predictions for a varietyof models. The data exclude a scalar singlet with mass below 2650 GeV, a heavy vector-boson triplet with mass below 2600 GeV, and a graviton with mass below √ 1100 GeV. Theseresults significantly extend the previous limits set using pp collisions at s = 8 TeV.