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Abstract: A template fitting technique for reconstructing the amplitude of signals produced by the lead tungstate crystals of the CMS electromagnetic calorimeter is described. This novel approach is designed to suppress the contribution to the signal of the increased number of out-of-time interactions per beam crossing following the reduction of the accelerator bunch spacing from 50 to 25 ns at the start of Run 2 of the LHC. Execution of the algorithm is sufficiently fast for it to be employed in the CMS high-level trigger. It is also used in the offline event reconstruction. Results obtained from simulations and from Run 2 collision data (2015?2018) demonstrate a substantial improvement in the energy resolution of the calorimeter over a range of energies extending from a few GeV to several tens of GeV.
Fuente: Journal of Instrumentation, Vol.15, P10002 (2020)
Publisher: Institute of Physics
Publication date: 01/10/2020
No. of pages: 45
Publication type: Article
DOI: 10.1088/1748-0221/15/10/P10002
ISSN: 1748-0221
Publication Url: https://doi.org/10.1088/1748-0221/15/10/P10002
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SIRUNYAN, A. M.
JOSE IBAN CABRILLO BARTOLOME
ALICIA CALDERON TAZON
BARBARA CHAZIN QUERO
JORGE DUARTE CAMPDERROS
MARCOS FERNANDEZ GARCIA
PEDRO JOSE FERNANDEZ MANTECA
GERVASIO GOMEZ GRAMUGLIO
CELSO MARTINEZ RIVERO
PABLO MARTINEZ RUIZ DEL ARBOL
FRANCISCO MATORRAS WEINIG
JONATAN PIEDRA GOMEZ
CEDRIC GERALD PRIEELS
FRANCESCA SHUN-NING ANNAROSA RICCI-TAM
MARIA TERESA RODRIGO ANORO
ALBERTO RUIZ JIMENO
LORENZO RUSSO
LUCA SCODELLARO
IVAN VILA ALVAREZ
JESUS MANUEL VIZAN GARCIA
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