Data-Driven Light Model for the MicroBooNE Experiment

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Data-Driven PMT Gain Calibration • PMT gain fluctuations over time can affect overall LY • Studies of gain performed using intrinsic single- and few-PE light deposits in MicroBooNE off- beam data [1] • Calibration implemented accounts for amplitude and distributions shifts Data-Driven Light Yield Calibration • Cathode and anode piercing cosmic muon tracks used to study light yield over 5 years of detector runs [2] • Calibration of light yield applied and incorporated into contribution to systematic uncertainties • Has allowed MicroBooNE's neutrino selection to not be impacted by the LY decline seen in later runs Data-Driven Light Model for the MicroBooNE Experiment Polina Abratenko on behalf of the MicroBooNE Collaboration • MicroBooNE ran from 2015-2021, collecting data from BNB and NuMI beamlines • As a surface detector, has collected a large amount of cosmic data that has been used for light yield (LY) calibration and studies • MicroBooNE has several data-informed studies of light behavior over time • Calibrations implemented to account for observed behavior • Future plans include using MicroBooNE data to inform a visibility map and study out-of-detector light behavior Measuring Light Yield with Isolated Protons • Large sample of isolated cosmic protons in off-beam data has allowed measurement of position-dependent total LY within the detector [3] • Use semi-analytical light model to simulate visibility map [4] • Confirms LY decline seen in calibration studies, and that it is position independent Light Detection System in MicroBooNE • 32 Hamamatsu 8" photomultiplier tubes along anode • Plates covered in tetraphenyl butadiene (TPB) convert scintillation light from argon scintillation emission to visible spectrum • Optical signals used in conjunction with

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