Signatures of new physics beyond the Standard Model are often characterized by large missing transverse energy (E T) produced in association with multiple jets. The dominant Standard Model background to such processes comes from gauge-boson production in association with jets. A standard search strategy involves looking for an excess in the m eff distribution, where m eff=E T+JpJT and pJT denotes the transverse momentum of the Jth jet. The region of large m eff is dominated by jet production near threshold, giving rise to large Sudakov logarithms that can change the magnitude and shape of the m eff distribution. We present an effective theory framework for the resummation of such threshold logarithms. We perform an analysis for exclusive jet production using the N-jettiness global event shape, which allows theoretical control to also be maintained over large logarithms induced by vetoing additional jets. As a first step, we give explicit numerical results with next-to-leading-log resummation for pp→γ+2 jets in the large m eff region.
|Original language||English (US)|
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|State||Published - Oct 2 2012|
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)