Evidence for a New Structure in the J=ψp and J=ψ ̄p Systems in B0 s → J=ψp ̄p Decays
Name
PhysRevLett.128.062001.pdf
Description
Published version
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410.48 KB
Format
Adobe PDF
Checksum (MD5)
8447a4122a9f773e2cf8ecb2385eda35
Author(s)
Williams, Michael
Date Issued
February 11, 2022
Journal
Physical Review Letters
Publisher
American Physical Society (APS)
Citation
Williams, Michael. 2022. "Evidence for a New Structure in the J=ψp and J=ψ ̄p Systems in B0 s → J=ψp ̄p Decays." Physical Review Letters, 128 (6).
Version
Final published version
Abstract
An amplitude analysis of flavour-untagged $B_s^0 \to J/\psi p \bar{p}$ decays
is performed using a sample of $797\pm31$ decays reconstructed with the LHCb
detector. The data, collected in proton-proton collisions between 2011 and
2018, correspond to an integrated luminosity of 9 $\text{fb}^{-1}$. Evidence
for a new structure in the $J/\psi p$ and $J/\psi \bar{p}$ systems with a mass
of $4337 \ ^{+7}_{-4} \ ^{+2}_{-2}~\text{MeV}$ and a width of $29 \
^{+26}_{-12} \ ^{+14}_{-14}~\text{MeV}$ is found, where the first uncertainty
is statistical and the second systematic, with a significance in the range of
3.1 to 3.7 $\sigma$, depending on the assigned $J^P$ hypothesis.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution 4.0 International License
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DOI of Published Version
https://doi.org/10.1103/physrevlett.128.062001
