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First determination of the ρ parameter at √s=13TeV : probing the existence of a colourless C-odd three-gluon compound state
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SYSNO ASEP 0540658 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title First determination of the ρ parameter at √s=13TeV : probing the existence of a colourless C-odd three-gluon compound state Author(s) Antchev, G. (BG)
Aspell, P. (CH)
Atanassov, I. (BG)
Kašpar, Jan (FZU-D) RID, ORCID
Kundrát, Vojtěch (FZU-D) RID, ORCID
Lokajíček, Miloš V. (FZU-D) RID, ORCID
Procházka, Jiří (FZU-D) RID, ORCIDNumber of authors 95 Article number 785 Source Title European Physical Journal C. - : Springer - ISSN 1434-6044
Roč. 79, č. 9 (2019), s. 1-26Number of pages 26 s. Language eng - English Country DE - Germany Keywords elastic proton-proton scattering ; LHC ; Coulomb-hadronic interference Subject RIV BF - Elementary Particles and High Energy Physics OECD category Particles and field physics R&D Projects LTT17018 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Research Infrastructure CERN-CZ - 90058 - Fyzikální ústav AV ČR, v. v. i. Method of publishing Open access Institutional support FZU-D - RVO:68378271 UT WOS 000487452200001 EID SCOPUS 85073212646 DOI 10.1140/epjc/s10052-019-7223-4 Annotation The TOTEM experiment at the LHC has performed the first measurement at √s = 13 TeV of the ρ parameter, obtaining the following results: ρ =0.09±0.01 and ρ =0.10±0.01, depending on different physics assumptions and mathematical modelling. The unprecedented precision of the ρ measurement, combined with the TOTEM total cross-section measurements in an energy range larger than 10 TeV (from 2.76 to 13 TeV), has implied the exclusion of all the models classified and published by COMPETE. The ρ results obtained by TOTEM are compatible with the theoretical model predictions. The very low-|t| reach allowed also to determine the absolute normalisation using the Coulomb amplitude for the first time at the LHC and obtain a new total proton-proton cross-section measurement σtot = (110.3±3.5) mb, completely independent from the previous TOTEM determination. Combining the two TOTEM results yields σtot = (110.5±2.4) mb.
Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2021 Electronic address http://hdl.handle.net/11104/0318297
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