Measurement of the Λb polarization and angular parameters in Λb → J=ψΛ decays from pp collisions at √s=7 and 8 TeV
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Abstract
An analysis of the bottom baryon decay Λb → J=ψ ð→ μþ μ−ÞΛð→ pπ−Þ 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 ± 0.06ðstatÞ± 0.06ðsystÞ and the parity-violating asymmetry parameter is determined to be 0.14 ± 0.14ðstatÞ± 0.10ðsystÞ. The measurements are compared to various theoretical predictions, including those from p ...
An analysis of the bottom baryon decay Λb → J=ψ ð→ μþ μ−ÞΛð→ pπ−Þ 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 ± 0.06ðstatÞ± 0.06ðsystÞ and the parity-violating asymmetry parameter is determined to be 0.14 ± 0.14ðstatÞ± 0.10ðsystÞ. The measurements are compared to various theoretical predictions, including those from perturbative quantum chromodynamics. ...
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Physical review. D, Particles, fields, gravitation, and cosmology. College Park. Vol. 97, no. 7 (Apr. 2018), 072010, 20 p.
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Artigos de Periódicos (40021)Ciências Exatas e da Terra (6101)
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