Measurement of the Λb polarization and angular parameters in Λb → J=ψΛ decays from pp collisions at √s=7 and 8 TeV
dc.contributor.author | Sirunyan, A. M. | pt_BR |
dc.contributor.author | Silveira, Gustavo Gil da | pt_BR |
dc.contributor.author | CMS Collaboration | pt_BR |
dc.date.accessioned | 2018-06-21T02:32:04Z | pt_BR |
dc.date.issued | 2018 | pt_BR |
dc.identifier.issn | 1550-7998 | pt_BR |
dc.identifier.uri | http://hdl.handle.net/10183/179601 | pt_BR |
dc.description.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 perturbative quantum chromodynamics. | en |
dc.format.mimetype | application/pdf | pt_BR |
dc.language.iso | eng | pt_BR |
dc.relation.ispartof | Physical review. D, Particles, fields, gravitation, and cosmology. College Park. Vol. 97, no. 7 (Apr. 2018), 072010, 20 p. | pt_BR |
dc.rights | Open Access | en |
dc.subject | Colisões proton-proton | pt_BR |
dc.subject | Aceleradores de partículas | pt_BR |
dc.subject | Cromodinâmica quântica | pt_BR |
dc.title | Measurement of the Λb polarization and angular parameters in Λb → J=ψΛ decays from pp collisions at √s=7 and 8 TeV | pt_BR |
dc.type | Artigo de periódico | pt_BR |
dc.identifier.nrb | 001066846 | pt_BR |
dc.type.origin | Estrangeiro | pt_BR |
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