Observation of t¯t production in Pb+Pb collisions at √sNN = 5.02 TeV with the ATLAS detector
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00619727" target="_blank" >RIV/68378271:_____/25:00619727 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11320/25:10511399
Result on the web
<a href="https://hdl.handle.net/11104/0366371" target="_blank" >https://hdl.handle.net/11104/0366371</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevLett.134.142301" target="_blank" >10.1103/PhysRevLett.134.142301</a>
Alternative languages
Result language
angličtina
Original language name
Observation of t¯t production in Pb+Pb collisions at √sNN = 5.02 TeV with the ATLAS detector
Original language description
Top-quark pair production is observed in lead–lead (Pb+Pb) collisions at sNN=5.02 TeV at the Large Hadron Collider with the ATLAS detector. The data sample was recorded in 2015 and 2018, amounting to an integrated luminosity of 1.9 nb-1. Events with exactly one electron and one muon and at least two jets are selected. Top-quark pair production is measured with an observed (expected) significance of 5.0 (4.1) standard deviations. The measured top-quark pair production cross section is σtt¯=3.6 -0.9+1.0(stat) -0.5+0.8(syst) μb, with a total relative uncertainty of 31%, and is consistent with theoretical predictions using a range of different nuclear parton distribution functions. The observation of this process consolidates the evidence of the existence of all quark flavors in the preequilibrium stage of the quark-gluon plasma at very high energy densities, similar to the conditions present in the early Universe.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10303 - Particles and field physics
Result continuities
Project
<a href="/en/project/EH22_008%2F0004632" target="_blank" >EH22_008/0004632: Fundamental constituents of matter through frontier technologies</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review Letters
ISSN
0031-9007
e-ISSN
1079-7114
Volume of the periodical
134
Issue of the periodical within the volume
14
Country of publishing house
US - UNITED STATES
Number of pages
22
Pages from-to
142301
UT code for WoS article
001505417900001
EID of the result in the Scopus database
2-s2.0-105003765541