Measurements of the production of P-wave charmonium states through radiative decays at the ATLAS experiment

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F14%3A00522707" target="_blank" >RIV/68378271:_____/14:00522707 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1051/epjconf/20147100082" target="_blank" >http://dx.doi.org/10.1051/epjconf/20147100082</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/epjconf/20147100082" target="_blank" >10.1051/epjconf/20147100082</a>

Result language
angličtina
Original language name
Measurements of the production of P-wave charmonium states through radiative decays at the ATLAS experiment
Original language description
The production cross sections of the chi_c1 and chi_c2 charmonium states are measured in pp collisions at s**(1/2) = 7 TeV using 4.5 fb^-1 of integrated luminosity recorded by the ATLAS detector at the LHC. The chi_c states are reconstructed via the radiative decay chi_c -> J/psi(mu^+mu^-)gamma, where the photons are reconstructed using gamma -> e^+ e^- conversion in the detector material. Differential production cross sections for prompt and non-prompt chi_c1,2 are presented, as well as the fraction of inclusive J/psi produced by feed-down from the chi_c states. The results are compared with a range of theoretical predictions. The branching fraction of ℬ (B^+ -> chi_c1K^+) is measured using the same dataset and chi_c event selection.n
Czech name
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Czech description
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Project
<a href="/en/project/LG13009" target="_blank" >LG13009: International experiment ATLAS-CERN</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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