A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Data-driven precision determination of the material budget in ALICE (2023)

ALICE collaboration. (2023). Data-driven precision determination of the material budget in ALICE. Journal of Instrumentation, 18(11), Article P11032. https://doi.org/10.1088/1748-0221/18/11/P11032

JYU-tekijät tai -toimittajat

Huhta, Laura
Kim, Dong
Molander, Andreas
Rytkönen, Heidi
Räsänen, Sami
Saarimäki, Oskari
Trzaska, Wladyslaw
Virta, Maxim
Önnerstad, Anna

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: ALICE collaboration

Lehti tai sarja: Journal of Instrumentation

eISSN: 1748-0221

Julkaisuvuosi: 2023

Ilmestymispäivä: 01.11.2023

Volyymi: 18

Lehden numero: 11

Artikkelinumero: P11032

Kustantaja: IOP Publishing

Julkaisumaa: Britannia

Julkaisun kieli: englanti

DOI: https://doi.org/10.1088/1748-0221/18/11/P11032

Julkaisun avoin saatavuus: Avoimesti saatavilla

Julkaisukanavan avoin saatavuus: Osittain avoin julkaisukanava

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/93083

Rinnakkaistallenteen verkko-osoite (pre-print): https://arxiv.org/abs/2303.15317

Tiivistelmä

The knowledge of the material budget with a high precision is fundamental for measurements of direct photon production using the photon conversion method due to its direct impact on the total systematic uncertainty. Moreover, it influences many aspects of the charged-particle reconstruction performance. In this article, two procedures to determine data-driven corrections to the material-budget description in ALICE simulation software are developed. One is based on the precise knowledge of the gas composition in the Time Projection Chamber. The other is based on the robustness of the ratio between the produced number of photons and charged particles, to a large extent due to the approximate isospin symmetry in the number of produced neutral and charged pions. Both methods are applied to ALICE data allowing for a reduction of the overall material budget systematic uncertainty from 4.5% down to 2.5%. Using these methods, a locally correct material budget is also achieved. The two proposed methods are generic and can be applied to any experiment in a similar fashion.

YSO-asiasanat: hiukkasfysiikka

Vapaat asiasanat: Analysis and statistical methods; Detector modelling and simulations I (interaction of radiation with matter, interaction of photons with matter, interaction of hadrons with matter, etc); Large detector systems for particle and astroparticle physics; Particle tracking detectors

Liittyvät organisaatiot

Hankkeet, joissa julkaisu on tehty

OKM-raportointi: Kyllä

VIRTA-lähetysvuosi: 2023

JUFO-taso: 1