Search for Dark Matter and Large Extra Dimensions in pp Collisions Yielding a Photon and Missing Transverse Energy at CMS

Bhawna Gomber

paper

Search for Dark Matter and Large Extra Dimensions in pp Collisions Yielding a Photon and Missing Transverse Energy at CMS

arXiv:1301.2673

Abstract

Results are presented from a search for new physics in the final state containing a photon and missing transverse energy. The data corresponds to an integrated luminosity of 5.0 fb $^{- 1}$ collected in pp collisions at $s$ = 7 TeV by the CMS experiment. The observed event yield agrees with standard model expectations. Using models for the production of dark matter particles( $χ$ ), we set 90χ $p r o d u c t i o nin t h e$ γ $+$ \met $s t a t e . T h ese p r o v i d e t h e m os t se n s i t i v e u pp er l imi t s f or s p in - d e p e n d e n t$ χ $- n u c l eo n sc a tt er in g f or hi ¸ ma sses b e tw ee n 1 an d 100 G e V . F or s p in d e p e n d e n t co n t r ib u t i o n s, t h e p r ese n tl imi t s a r ee x t e n d e d t o M ($ χ $)$ <$ 3.5 GeV. For ADD models with 3-6 large extra dimensions, our data exclude extra-dimensional Planck scales between 1.64 and 1.73 TeV at 95% C.L.

Physics in Collision, Slovakia, 2012