W+jets at CDF: evidence for top quarks

Tilman Plehn (1) , Michihisa Takeuchi (1)

1 Institut für Theoretische Physik

Recently, an anomaly of W +jets events at large invariant masses has been reported by CDF. Many interpretations as physics beyond the Standard Model are being offered. We show how such an invariant mass peak can arise from a slight shift in the relative normalization of the top and W W backgrounds. In recent years, the Tevatron experiments have run a successful search program studying weak gauge boson and top quarks we well as searching for a Higgs boson and for new physics. A specific search for V +jets production (V = W, Z) [ 1-3 ] follows a long list of motivations [ 4 ]: we can test QCD effects such as the so-called staircase scaling of n-jet production [ 5 ], we can search for triple gauge boson couplings in W + W − and W ± Z production [ 1, 6 ], we can search for technicolor signals [ 7, 8 ], or in the case of two bottom jets we can look for W H associated production [ 9 ]. Some of these channels include a study of the invariant mass of the two leading jets recoiling against a leptonically decaying W boson

Mots clés: Physical Sciences

Tilman Plehn, Michihisa Takeuchi. W+jets at CDF: evidence for top quarks. Journal of Physics G: Nuclear and Particle Physics, 2011, 38 (9), pp.95006. ⟨10.1088/0954-3899/38/9/095006⟩. ⟨hal-00646932⟩