APS April Meeting 2018


This talk was given on the result of my dissertation research titled, “Search for signatures of large extra dimensions in high-mass diphoton events using proton-proton collisions at $\sqrt{s} = 13$ TeV with CMS”. The APS April Meeting is an annual national conference in the field. More info can be found at http://meetings.aps.org/Meeting/APR18/Session/C09.5.

Abstract: A search for the non-resonant production of high-mass diphoton events using proton-proton collisions at a center-of-mass energy of 13 TeV collected by the CMS detector is presented. The data corresponds to an integrated luminosity of 35.9 inverse femtobarns recorded during 2016. A next-to-next-to-leading order Monte Carlo calculation is used to predict the dominant, irreducible diphoton background. A data-driven technique is used to estimate the subdominant, reducible photon+jet and dijet backgrounds where one or two jets fake a photon signature in the detector. A non-resonant excess of diphoton events could signify new physics. Results will be presented on the scenario of large extra dimensions as described by the model of Arkani-Hamed, Dimopoulos, and Dvali.