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Title
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Measurement of the polarization and angular parameters in decays from pp collisions at =7 and 8 TeV
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Author
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Institution/Organisation
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CMS Collaboration
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Abstract
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| An analysis of the bottom baryon decay Lambda(b) -> J/psi(-> mu(+)mu(-))Lambda( -> p pi(-)) is performed to measure the Lambda(b) polarization and three angular parameters in data from pp collisions at root s = 7 and 8 TeV, collected by the CMS experiment at the Large Hadron Collider. The Lambda(b) 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. |
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Language
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English
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Source (journal)
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PHYSICAL REVIEW D
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Publication
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2018
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DOI
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10.1103/PHYSREVD.97.072010
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Volume/pages
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97
:7
(2018)
, 20 p.
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Article Reference
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072010
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ISI
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000430163500001
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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