# Determination of muon momentum in the MicroBooNE LArTPC using an improved model of multiple Coulomb scattering **Authors:** MicroBooNE collaboration: P. Abratenko, R. Acciarri, C. Adams, R. An,, J. Asaadi, M. Auger, L. Bagby, S. Balasubramanian, B. Baller, C. Barnes, G., Barr, M. Bass, F. Bay, M. Bishai, A. Blake, T. Bolton, L. Bugel, L., Camilleri, D. Caratelli, B. Carls, R. Castillo Fernandez, F. Cavanna, H., Chen, E. Church, D. Cianci, E. Cohen, G.H. Collin, J.M. Conrad, M. Convery,, J.I. Crespo-Anadon, M. Del Tutto, D. Devitt, S. Dytman, B. Eberly, A., Ereditato, L. Escudero Sanchez, J. Esquivel, B.T. Fleming, W. Foreman, A.P., Furmanski, D. Garcia-Gamez, G.T. Garvey, V. Genty, D. Goeldi, S. Gollapinni,, N. Graf, E. Gramellini, H. Greenlee, R. Grosso, R. Guenette, A. Hackenburg,, P. Hamilton, O. Hen, V Hewes, C. Hill, J. Ho, G. Horton-Smith, E.-C. Huang,, C. James, J. Jan de Vries, C.-M. Jen, L. Jiang, R.A. Johnson, B.J.P. Jones,, J. Joshi, H. Jostlein, D. Kaleko, L.N. Kalousis, G. Karagiorgi, W. Ketchum,, B. Kirby, M. Kirby, T. Kobilarcik, I. Kreslo, A. Laube, Y. Li, A. Lister,, B.R. Littlejohn, S. Lockwitz, D. Lorca, W.C. Louis, M. Luethi, B. Lundberg,, X. Luo, A. Marchionni, C. Mariani, J. Marshall, D.A. Martinez Caicedo, V., Meddage, T. Miceli, G.B. Mills, J. Moon, M. Mooney, C.D. Moore, J. Mousseau,, R. Murrells, D. Naples, P. Nienaber, J. Nowak, O. Palamara, V. Paolone, V., Papavassiliou, S.F. Pate, Z. Pavlovic, E. Piasetzky, D. Porzio, G. Pulliam,, X. Qian, J.L. Raaf, A. Rafique, L. Rochester, C. Rudolf von Rohr, B. Russell,, D.W. Schmitz, A. Schukraft, W. Seligman, M.H. Shaevitz, J. Sinclair, E.L., Snider, M. Soderberg, S. Soldner-Rembold, S.R. Soleti, P. Spentzouris, J., Spitz, J. St. John, T. Strauss, A.M. Szelc, N. Tagg, K. Terao, M. Thomson, M., Toups, Y.-T. Tsai, S. Tufanli, T. Usher, R.G. Van de Water, B. Viren, M., Weber, J. Weston, D.A. Wickremasinghe, S. Wolbers, T. Wongjirad, K. Woodruff,, T. Yang, L. Yates, G.P. Zeller, J. Zennamo, C. Zhang arXiv: 1703.06187 · 2023-02-17 ## TL;DR This paper presents an improved multiple Coulomb scattering method for measuring muon momentum in the MicroBooNE LArTPC, effective for both contained and exiting tracks, with enhanced accuracy after re-tuning the Highland formula. ## Contribution It introduces a re-tuned Highland formula specific to liquid argon, improving muon momentum measurement accuracy in MicroBooNE's LArTPC for various track types. ## Key findings - Resolutions improve from 10% to 5% for longer tracks. - Agreement between data and simulation with small bias. - Effective for muons below 2 GeV/c with less than 15% resolution. ## Abstract We discuss a technique for measuring a charged particle's momentum by means of multiple Coulomb scattering (MCS) in the MicroBooNE liquid argon time projection chamber (LArTPC). This method does not require the full particle ionization track to be contained inside of the detector volume as other track momentum reconstruction methods do (range-based momentum reconstruction and calorimetric momentum reconstruction). We motivate use of this technique, describe a tuning of the underlying phenomenological formula, quantify its performance on fully contained beam-neutrino-induced muon tracks both in simulation and in data, and quantify its performance on exiting muon tracks in simulation. Using simulation, we have shown that the standard Highland formula should be re-tuned specifically for scattering in liquid argon, which significantly improves the bias and resolution of the momentum measurement. With the tuned formula, we find agreement between data and simulation for contained tracks, with a small bias in the momentum reconstruction and with resolutions that vary as a function of track length, improving from about 10% for the shortest (one meter long) tracks to 5% for longer (several meter) tracks. For simulated exiting muons with at least one meter of track contained, we find a similarly small bias, and a resolution which is less than 15% for muons with momentum below 2 GeV/c. Above 2 GeV/c, results are given as a first estimate of the MCS momentum measurement capabilities of MicroBooNE for high momentum exiting tracks. ## Full text _Full body text omitted from this summary view._ Fetch the complete paper as Markdown: https://tomesphere.com/paper/1703.06187/full.md ## Figures 34 figures with captions in the complete paper: https://tomesphere.com/paper/1703.06187/full.md ## References 24 references — full list in the complete paper: https://tomesphere.com/paper/1703.06187/full.md --- Source: https://tomesphere.com/paper/1703.06187