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Showing 1 to 7 of 7 for “"diphoton"”.
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Observation and measurement of a standard model Higgs Boson-like diphoton resonance with the CMS detector
This thesis concerns the observation of a new particle and the measurements of its properties, from the search of the Higgs boson through its decay into two photons at the CMS experiment at CERN's Large Hadron Collider (LHC), on the full LHC "Run I" data collected by the CMS detector during 2011 …
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Evidence for a narrow Higgs-like diphoton resonance with a mass of 125 GeV in pp collisions at [square root of]s = 7 - 8 TeV
… of the standard model Higgs boson decaying to diphotons in pp collisions at the LHC at [square root of]s = 7-8 TeV with the CMS detector. Having analyzed data corresponding to 5.1 fb-1 at [square root of]s = 7 TeV (2011) and 5.3 fb-1 at [square root of]s = 8 TeV (2012), a statistically …
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A Search For New Low-Mass Diphoton Resonances At Atlas And An Investigation Into Using Gaussian Process Regression To Model Non-Resonant Two-Photon Standard Model Backgrounds
… search for new physics in low-mass (65-110 GeV) diphoton events. This is a model independent search that is motivated by several extensions to the Standard Model including the two Higgs doublet model where new scalars can appear as lighter versions of the Standard Model Higgs. No evidence for a …
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Constraining New Physics with Colliders and Neutrinos
… In this case, we use the previous diboson and diphoton statistical excess as examples to do the analysis. Second, we parametrize low energy new physics in the neutrino sector in terms of non-standard interactions (NSI), which are constrained by past and proposed future neutrino experiments. As …
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Strongly interacting photons via Rydberg-Rydberg interactions
… acquire a finite mass and we see evidence for a diphoton molecule. In the third experiment, by measuring higher-order correlation functions, we observe a three-photon bound state evidenced by tighter binding in addition to a larger conditional phase shift than the two-photon states. By comparing …
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PROBING THE HIGGS BOSON WITH THE ATLAS DETECTOR: PRECISION MEASUREMENTS OF THE MASS AND SEARCH FOR RARE DECAYS TO A LOW-MASS DILEPTON SYSTEM AND A PHOTON IN PROTON-PROTON COLLISIONS AT THE LHC
… measurement of the Higgs boson mass in the diphoton decay channel, $H \rightarrow \gamma\gamma$, using the full Run~2 dataset. The Higgs boson mass is measured to be $m_H = 125.17 \pm 0.11\,(\mathrm{stat.}) \pm 0.09\,(\mathrm{syst.})~\mathrm{GeV} = 125.17 \pm 0.14~\mathrm{GeV}$. The improved …
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The Development of Computational Tools for Theoretical Predictions in Particle Physics at the Large Hadron Collider
The Large Hadron Collider (LHC) experiments are an excellent tool for the improvement of our knowledge of the Standard Model and the examination of Beyond Standard Model theories. Nonetheless, to maximise the learning-potential of the LHC, clear and precise theoretical predictions are needed, for …