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arxiv: 1104.1894 · v2 · pith:SEYCP4EDnew · submitted 2011-04-11 · ✦ hep-ph · hep-ex· nucl-ex· nucl-th

The CDF dijet excess from intrinsic quarks

classification ✦ hep-ph hep-exnucl-exnucl-th
keywords dijetexcessproductionintrinsicquarksassociationeventsexplanation
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The CDF collaboration reported an excess in the production of two jets in association with a $W$. We discuss constraints on possible new particle state interpretations of this excess. The fact of no statistically significant deviation from the SM expectation for {$Z$+dijet} events in CDF data disfavors the new particle explanation. We show that the nucleon intrinsic strange quarks provide an important contribution to the $W$ boson production in association with a single top quark production. Such {$W$+t} single top quark production can contribute to the CDF {$W$+dijet} excess, thus the nucleon intrinsic quarks can provide a possible explanation to the CDF excess in {$W$+dijet} but not in {$Z$+dijet} events.

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