Measurement of the polarizations of prompt and non-prompt J/ψ and ψ(2S) mesons produced in pp collisions at √s=13 TeV
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10493356" target="_blank" >RIV/00216208:11320/24:10493356 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=vXpyxNa~Ep" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=vXpyxNa~Ep</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.physletb.2024.139044" target="_blank" >10.1016/j.physletb.2024.139044</a>
Alternative languages
Result language
angličtina
Original language name
Measurement of the polarizations of prompt and non-prompt J/ψ and ψ(2S) mesons produced in pp collisions at √s=13 TeV
Original language description
The polarizations of prompt and non-prompt J/psi and psi(2S) mesons are measured in proton-proton collisions at root s = 13TeV, using data samples collected by the CMS experiment in 2017 and 2018, corresponding to a total integrated luminosity of 103.3 fb(-1). Based on the analysis of the dimuon decay angular distributions in the helicity frame, the polar anisotropy, lambda(theta), is measured as a function of the transverse momentum, p(T), of the charmonium states, in the 25-120 and 20-100GeV ranges for the J/psi and psi(2S), respectively. The non-prompt polarizations agree with predictions based on the hypothesis that, for p(T) greater than or similar to 25 GeV, the non-prompt J/psi and psi(2S) are predominantly produced in two-body B meson decays. The prompt results clearly exclude strong transverse polarizations, even for p(T) exceeding 30 times the J/psi mass, where lambda(theta) tends to an asymptotic value around 0.3. Taken together with previous measurements, by CMS and LHCb at root s = 7TeV, the prompt polarizations show a significant variation with p(T), at low p(T).
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
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OECD FORD branch
10300 - Physical sciences
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
ISSN
0370-2693
e-ISSN
1873-2445
Volume of the periodical
858
Issue of the periodical within the volume
30.09.2024
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
30
Pages from-to
139044
UT code for WoS article
001381333500001
EID of the result in the Scopus database
2-s2.0-85205550955