Measurement of the Λb polarization and angular parameters in Λb→J/ψΛ decays from pp collisions at √s=7 and 8 TeV (CROSBI ID 267032)
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Podaci o odgovornosti
Sirunyan, Albert ; ... ; Đurić, Senka ; Lelas, Damir ; Godinović, Nikola ; Puljak, Ivica ; Šćulac, Toni ; Mesić, Benjamin ; Šuša, Tatjana ; Kovač, Marko ; Ferenček, Dinko ; Antunović, Željko ; Starodumov, Andrey ; Brigljević, Vuko ; Luetić, Jelena ; Kadija, Krešo ; ... ; Woods, Nate
CMS Collaboration
engleski
Measurement of the Λb polarization and angular parameters in Λb→J/ψΛ decays from pp collisions at √s=7 and 8 TeV
An analysis of the bottom baryon decay Λb→J/ψ(→μ+μ−)Λ(→pπ−) is performed to measure the Λb polarization and three angular parameters in data from pp collisions at √s=7 and 8 TeV, collected by the CMS experiment at the Large Hadron Collider. The Λb polarization is measured to be 0.00±0.06(stat)±0.06(syst) and the parity-violating asymmetry parameter is determined to be 0.14±0.14(stat)±0.10(syst). The measurements are compared to various theoretical predictions, including those from perturbative quantum chromodynamics.
High energy physics ; Experimental particle physics ; LHC ; CMS ; Standard Model
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