Measurement of the parity-violating asymmetry parameter αb and the helicity amplitudes for the decay Λ⁰b→J/ψΛ⁰ with the ATLAS detector
| dc.contributor.author | Aad, G. | |
| dc.contributor.author | ATLAS Collaboration, | |
| dc.date.issued | 2014 | |
| dc.description.abstract | A measurement of the parity-violating decay asymmetry parameter, alpha b, and the helicity amplitudes for the decay Lambda0b ->J/psi(mu+mu -)Lambda0(p pi -) is reported. The analysis is based on 1400 Lambda0b and Lambda -bar0b baryons selected in 4.6fb -1 of proton-proton collision data with a center-of-mass energy of 7 TeV recorded by the ATLAS experiment at the LHC. By combining the Lambda0b and Lambda -bar0b samples under the assumption of CP conservation, the value of alpha b is measured to be 0.30+/-0.16(stat)+/-0.06(syst). This measurement provides a test of theoretical models based on perturbative QCD or heavy-quark effective theory. | |
| dc.description.statementofresponsibility | G. Aad … P. Jackson … L. Lee … A. Petridis … N. Soni ... M. White ... et al. (The ATLAS Collaboration) | |
| dc.identifier.citation | Physical Review D: Particles, Fields, Gravitation and Cosmology, 2014; 89(9):092009-1-092009-25 | |
| dc.identifier.doi | 10.1103/PhysRevD.89.092009 | |
| dc.identifier.issn | 1550-2368 | |
| dc.identifier.issn | 1550-2368 | |
| dc.identifier.uri | http://hdl.handle.net/2440/102554 | |
| dc.language.iso | en | |
| dc.publisher | American Physical Society | |
| dc.rights | © 2014 CERN, for the ATLAS Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published articles title, journal citation, and DOI. | |
| dc.source.uri | https://doi.org/10.1103/physrevd.89.092009 | |
| dc.title | Measurement of the parity-violating asymmetry parameter αb and the helicity amplitudes for the decay Λ⁰b→J/ψΛ⁰ with the ATLAS detector | |
| dc.title.alternative | Measurement of the parity-violating asymmetry parameter alpha b and the helicity amplitudes for the decay Lambda(0)b ->J/psiLambda(0) with the ATLAS detector | |
| dc.type | Journal article | |
| pubs.publication-status | Published |
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