Speaker
Description
We report on the results of new physics searches in a final state containing a photon and missing transverse energy called “monophoton searches” in a p-p collision at √s =13TeV. The data correspond to an integrated luminosity of 138fb$^-$$^1$. In the Standard Model, the only process that results in the genuine signature of a single photon and large MET is Z + γ production, in which the Z boson decays into a neutrino ($\nu$) and an antineutrino ($\overline{\nu}$). The rate of Z + γ production can be precisely calculated in the SM, and therefore a deviation of the observation from the prediction in this signature is a robust indicator of the physics beyond the standard model. This process, in which the Z boson decays to 2 neutrinos, is the irreducible process, as the signal and background look exactly the same in the detector. In practice, multiple other collision and non-collision processes mimic the signature and thus constitute the additional background to this search. We aim to reduce the contributions from such non-Z+γ backgrounds and other remaining backgrounds using the data-driven techniques and Monte Carlo (MC) simulations. Results are interpreted in the context of dark matter using simplified models and large extra dimensions using ADD model
| Session | Beyond the Standard Model |
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