Identification of charm jets at LHCb
LHCb collaboration: R. Aaij, A.S.W. Abdelmotteleb, C. Abell\'an, Beteta, F.J. Abudinen Gallego, T. Ackernley, B. Adeva, M. Adinolfi, H., Afsharnia, C. Agapopoulou, C.A. Aidala, S. Aiola, Z. Ajaltouni, S. Akar, J., Albrecht, F. Alessio, M. Alexander, A. Alfonso Albero
TL;DR
This paper presents a method for identifying charm jets at LHCb using displaced vertex properties, demonstrating good agreement between measured efficiencies and simulations across various jet transverse momenta.
Contribution
The paper introduces a charm-jet identification technique based on displaced vertex properties and validates its performance with real data and simulation.
Findings
Charm-tagging efficiency varies with jet transverse momentum.
Measured efficiencies agree well with simulation results.
Method achieves unbiased charm jet identification.
Abstract
The identification of charm jets is achieved at LHCb for data collected in 2015-2018 using a method based on the properties of displaced vertices reconstructed and matched with jets. The performance of this method is determined using a dijet calibration dataset recorded by the LHCb detector and selected such that the jets are unbiased in quantities used in the tagging algorithm. The charm-tagging efficiency is reported as a function of the transverse momentum of the jet. The measured efficiencies are compared to those obtained from simulation and found to be in good agreement.
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