Observation of New Ξ c 0 Baryons Decaying to Λ c + K −

This is not the latest version of this item. The latest version can be found here.

Observation of New Ξ c 0 Baryons Decaying to Λ c + K −

Download

Name

PhysRevLett.124.222001.pdf

Description

Published version

Size

560.47 KB

Format

Adobe PDF

Checksum (MD5)

f23034f5ccf9d37ce5c9ca34c7202184

sword-2020-11-23T15:58:06.original.xml (130 B)

Original SWORD entry document

Date Issued

2020

Journal

Physical Review Letters

Publisher

American Physical Society (APS)

Version

Final published version

Abstract

© 2020 CERN. The Λc+K- mass spectrum is studied with a data sample of pp collisions at a center-of-mass energy of 13 TeV corresponding to an integrated luminosity of 5.6 fb-1 collected by the LHCb experiment. Three Ξc0 states are observed with a large significance and their masses and natural widths are measured to be m[Ξc(2923)0]=2923.04±0.25±0.20±0.14 MeV, Γ[Ξc(2923)0]=7.1±0.8±1.8 MeV, m[Ξc(2939)0]=2938.55±0.21±0.17±0.14 MeV, Γ[Ξc(2939)0]=10.2±0.8±1.1 MeV, m[Ξc(2965)0]=2964.88±0.26±0.14±0.14 MeV, Γ[Ξc(2965)0]=14.1±0.9±1.3 MeV, where the uncertainties are statistical, systematic, and due to the limited knowledge of the Λc+ mass. The Ξc(2923)0 and Ξc(2939)0 baryons are new states. The Ξc(2965)0 state is in the vicinity of the known Ξc(2970)0 baryon; however, their masses and natural widths differ significantly.

Terms of Use

Creative Commons Attribution 4.0 International license

https://creativecommons.org/licenses/by/4.0/

Persistent DSpace Link

https://hdl.handle.net/1721.1/133754

DOI of Published Version

10.1103/PHYSREVLETT.124.222001