A Flexible and Efficient Approach to Missing Transverse Momentum Reconstruction.

Autor: Balunas W; Cavendish Laboratory, University of Cambridge, Cambridge, UK., Cavalli D; INFN Sezione di Milano & Dipartimento di Fisica, Università di Milano, Milano, Italy., Khoo TJ; Institut für Physik, Humboldt-Universität zu Berlin, Berlin, Germany., Klein M; Physics Department, Southern Methodist University, Dallas, TX USA., Loch P; Physics Department, University of Arizona, Tucson, AZ USA., Piazza F; Institute for Fundamental Science, University of Oregon, Eugene, OR USA., Pizio C; INFN Sezione di Milano & Dipartimento di Fisica, Università di Milano, Milano, Italy., Resconi S; INFN Sezione di Milano & Dipartimento di Fisica, Università di Milano, Milano, Italy., Schaefer D; Enrico Fermi Institute, University of Chicago, Chicago, IL USA., Smith R; Nevis Laboratory, Columbia University, Irvington, NY USA., Williams S; Cavendish Laboratory, University of Cambridge, Cambridge, UK.
Jazyk: angličtina
Zdroj: Computing and software for big science [Comput Softw Big Sci] 2024; Vol. 8 (1), pp. 2. Date of Electronic Publication: 2024 Jan 02.
DOI: 10.1007/s41781-023-00110-z
Abstrakt: Missing transverse momentum is a crucial observable for physics at hadron colliders, being the only constraint on the kinematics of "invisible" objects such as neutrinos and hypothetical dark matter particles. Computing missing transverse momentum at the highest possible precision, particularly in experiments at the energy frontier, can be a challenging procedure due to ambiguities in the distribution of energy and momentum between many reconstructed particle candidates. This paper describes a novel solution for efficiently encoding information required for the computation of missing transverse momentum given arbitrary selection criteria for the constituent reconstructed objects. Pileup suppression using information from both the calorimeter and the inner detector is an integral component of the reconstruction procedure. Energy calibration and systematic variations are naturally supported. Following this strategy, the ATLAS Collaboration has been able to optimise the use of missing transverse momentum in diverse analyses throughout Runs 2 and 3 of the Large Hadron Collider and for future analyses.
Competing Interests: Competing InterestsThe authors declare no competing interests.
(© The Author(s) 2024.)
Databáze: MEDLINE
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