LHCb collaboration (Including: Back, J. J., Blake, Thomas, Crocombe, Andrew, Gershon, T. J., Kreps, Michal, Langenbruch, Christoph, Latham, Thomas, Loh, David, Mathad, Abhijit , O'Hanlon, Daniel P., Poluektov, Anton, Wallace, Charlotte and Wicht, Jean). (2016) Measurement of the properties of the Ξb∗ 0 baryon. Journal of High Energy Physics, 2016 (5). 161. doi:10.1007/jhep05(2016)161

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Abstract

We perform a search for near-threshold Ξb0 resonances decaying to Ξb−π+ in a sample of proton-proton collision data corresponding to an integrated luminosity of 3 fb−1 collected by the LHCb experiment. We observe one resonant state, with the following properties: mΞb∗0−mΞb−−mπ+=15.727±0.068stat±0.023systMeV/c2ΓΞb∗0=0.90±0.16stat±0.08systMeV.This confirms the previous observation by the CMS collaboration. The state is consistent with the JP = 3/2+ Ξb∗ 0 resonance expected in the quark model. This is the most precise determination of the mass and the first measurement of the natural width of this state. We have also measured the ratio σpp→Ξb∗0XℬΞb∗0→Ξb−π+σpp→Ξb−X=0.28±0.03stat.±0.01syst..

Item Type:	Journal Article
Divisions:	Faculty of Science > Physics
SWORD Depositor:	Library Publications Router
Journal or Publication Title:	Journal of High Energy Physics
Publisher:	Springer Berlin Heidelberg
ISSN:	1029-8479
Official Date:	27 May 2016
Dates:	Date Event 27 May 2016 Published 10 May 2016 Accepted
Volume:	2016
Number:	5
Article Number:	161
DOI:	10.1007/jhep05(2016)161
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Open Access

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