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Measurement of the parity-violating asymmetry parameter ab and the helicity amplitudes for the decay Lambda(0)(b) -> J/psi Lambda(0) with the ATLAS detector
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
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Number of Authors: 2897
2014 (English)In: Physical Review D, ISSN 1550-7998, E-ISSN 1550-2368, Vol. 89, no 9, 092009- p.Article in journal (Refereed) Published
Abstract [en]

A measurement of the parity-violating decay asymmetry parameter, ab, and the helicity amplitudes for the decay.Lambda(0)(b) -> J/psi(mu(+) mu(-)) Lambda(0)(p pi(-)) is reported. The analysis is based on 1400 Lambda(0)(b)and (Lambda) over bar (0)(b) baryons selected in 4.6 fb(-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.0 b and. _ 0 b samples under the assumption of CP conservation, the value of ab 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.

Place, publisher, year, edition, pages
2014. Vol. 89, no 9, 092009- p.
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Physical Sciences
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URN: urn:nbn:se:su:diva-105916DOI: 10.1103/PhysRevD.89.092009ISI: 000336651300001OAI: oai:DiVA.org:su-105916DiVA: diva2:733264
Note

AuthorCount:2897;

Available from: 2014-07-08 Created: 2014-07-08 Last updated: 2017-12-05Bibliographically approved

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Abulaiti, YimingÅsman, BarbroBendtz, KatarinaBessidskaia, OlgaBohm, ChristianClément, ChristopheEriksson, DanielGellerstedt, KarlHellman, StenJohansson, K. ErikJon-And, KerstinKhandanyan, HovhannesKim, HyeonKlimek, PawelLundberg, OlofMilstead, David A.Moa, TorbjörnMolander, SimonOhm, Christian C.Petridis, AndreasPlucinski, PawelRossetti, ValerioSjölin, JörgenStrandberg, SaraTylmad, Maja
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