Journal article
Measurement of the parity-violating asymmetry parameter 𝛼𝑏 and the helicity amplitudes for the decay Λ0 𝑏→𝐽/𝜓Λ0 with the ATLAS detector
Physical review. D, Particles, fields, gravitation, and cosmology, Vol.89(9), 092009
05/27/2014
DOI: 10.1103/physrevd.89.092009
Abstract
A measurement of the parity-violating decay asymmetry parameter, αb, and the helicity amplitudes for the decay Λb0→J/ψ(μ+μ-)Λ0(pπ-) is reported. The analysis is based on 1400 Λb0 and Λ¯b0 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 Λb0 and Λ¯b0 samples under the assumption of CP conservation, the value of αb 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.
Details
- Title: Subtitle
- Measurement of the parity-violating asymmetry parameter 𝛼𝑏 and the helicity amplitudes for the decay Λ0 𝑏→𝐽/𝜓Λ0 with the ATLAS detector
- Creators
- Trygve Buanes - Universidade Federal do Rio de JaneiroØrjan DaleGerald Eigen - Universidade Federal do Rio de JaneiroAlex Kastanas - Universidade Federal do Rio de JaneiroWolfgang Liebig - Universidade Federal do Rio de JaneiroAnna Lipniacka - Universidade Federal do Rio de JaneiroBertrand Martin Dit LatourPeter Lundgaard Rosendahl - Universidade Federal do Rio de JaneiroHeidi Sandaker - Universidade Federal do Rio de JaneiroTherese B Sjursen - Universidade Federal do Rio de JaneiroBjarne Stugu - Universidade Federal do Rio de JaneiroMaren Ugland - Universidade Federal do Rio de JaneiroLars Bugge - Universidade Federal do Rio de JaneiroMagnar Kopangen Bugge - Universidade Federal do Rio de JaneiroDavid Gordon Cameron - Universidade Federal do Rio de JaneiroZofia Czyczula - Yale UniversityBørge Kile Gjelsten - Universidade Federal do Rio de JaneiroEirik Gramstad - Universidade Federal do Rio de JaneiroFarid Ould-SaadaKatarina Pajchel - Universidade Federal do Rio de JaneiroMaiken Pedersen - Universidade Federal do Rio de JaneiroYuriy Pylypchenko - Universidade Federal do Rio de JaneiroAlexander Lincoln Read - Universidade Federal do Rio de JaneiroOle Myren RøhneLillian Smestad - Universidade Federal do Rio de JaneiroSteinar Stapnes - Universidade Federal do Rio de JaneiroAre Strandlie - Universidade Federal do Rio de JaneiroGeorges Aad - Aix-Marseille UniversitéTatevik Abajyan - University of BonnBrad Abbott - University of OklahomaJalal Abdallah - Academia SinicaSamah Abdel KhalekOvsat Bahram Oglu AbdinovRosemarie Aben - University of AmsterdamBabak Abi - Oklahoma State UniversityMaris Abolins - Michigan State UniversityHass Abouzeid - University of GenevaHalina Abramowicz - Tel Aviv UniversityHenso Abreu - University of UdineLeszek Adamczyk - AGH University of KrakowDavid Adams - Brookhaven National LaboratoryJareed Adelman - Yale UniversityStefanie Adomeit - Ludwig-Maximilians-Universität MünchenTim Adye - Rutherford Appleton LaboratoryTatjana Agatonovic-JovinJuan Antonio Aguilar SaavedraMarco Agustoni - University of BernSteven Ahlen - Boston UniversityAharrouche Ahmad - Stony Brook UniversityGiulio Aielli - University of Rome Tor VergataATLAS Collaboration
- Contributors
- U Mallik (Contributor) - University of Iowa, Physics and Astronomy
- Resource Type
- Journal article
- Publication Details
- Physical review. D, Particles, fields, gravitation, and cosmology, Vol.89(9), 092009
- DOI
- 10.1103/physrevd.89.092009
- ISSN
- 1550-7998
- eISSN
- 1550-2368
- Publisher
- American Physical Society
- Language
- English
- Date published
- 05/27/2014
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984199739202771
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