V. M Abazov | Searcharxiv

arXiv2008

Search for sneutrino particles in e + mu final states in ppbar collisions at sqrt{s} =1.96 TeV

We report a search for R-parity violating production and decay of sneutrino particles in the e+mu final state with 1.04+-0.06 fb-1 of data collected with the D0 detector at the Fermilab Tevatron Collider in 2002--2006. Good agreement between the data and the standard model prediction is observed. With no evidence for new physics, we set limits on the R-parity violating couplings $λ^{\prime}_{311}$ and $λ_{312}$ as a function of sneutrino mass.

hep-ex↗

arXiv2006

Search for pair production of scalar bottom quarks in ppbar collisions at sqrt(s)=1.96 TeV

A search for direct production of scalar bottom quarks (sb) is performed with 310 pb-1 of data collected by the DO experiment in ppbar collisions at sqrt(s)=1.96 TeV at the Fermilab Tevatron Collider. The topology analyzed consists of two b jets and an imbalance in transverse momentum due to undetected neutralinos chi0_1, with chi0_1 assumed to be the lightest supersymmetric particle. We find the data consistent with standard model expectations, and set a 95% C.L. exclusion domain in the (m_sb,m_chi0_1) mass plane, improving significantly upon the results from Run I of the Tevatron.

hep-ex↗