Test of lepton universality with Lambda(0)(b) -> pK(-) l(+)l(-)
File(s)
Published version
Author(s)
Type
Journal Article
Abstract
The ratio of branching fractions of the decays Λ0b → pK−e+e− and Λ0b → pK−μ+μ−,R−1pK, is measured for the first time using proton-proton collision data corresponding to an integrated luminosity of 4.7 fb−1 recorded with the LHCb experiment at center-of-mass energies of 7, 8 and 13 TeV. In the dilepton mass-squared range 0.1 < q2< 6.0 GeV2/c4 and the pK− mass range m(pK−) < 2600 MeV/c2, the ratio of branching fractions is measured to be R−1pK=1.17+0.18−0.16±0.07, where the first uncertainty is statistical and the second systematic. This is the first test of lepton universality with b baryons and the first observation of the decay Λ0b → pK−e+e−.
Date Issued
2020-05-11
Date Acceptance
2020-04-10
Citation
The Journal of High Energy Physics, 2020, 2020 (5), pp.1-27
ISSN
1029-8479
Publisher
Springer Verlag (Germany)
Start Page
1
End Page
27
Journal / Book Title
The Journal of High Energy Physics
Volume
2020
Issue
5
Copyright Statement
© 2020. This article is distributed under the terms of the Creative Commons
Attribution License (CC-BY 4.0) (https://creativecommons.org/licenses/by/4.0/), which permits any use, distribution and reproduction in
any medium, provided the original author(s) and source are credited.
Attribution License (CC-BY 4.0) (https://creativecommons.org/licenses/by/4.0/), which permits any use, distribution and reproduction in
any medium, provided the original author(s) and source are credited.
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000534629900001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Physical Sciences
Physics, Particles & Fields
Physics
B physics
Branching fraction
Flavour Changing Neutral Currents
Hadron
Hadron scattering (experiments)
Rare decay
DECAY
Publication Status
Published
Article Number
ARTN 40
Date Publish Online
2020-05-11