Choi's work mainly concerns
CP violation and decays of the
B meson.[4] Choi worked on the
Belle experiment, where she identified several new types of
fundamental particles. The first results from
Belle came in 2002, finding large cross-sections for the e+e−continuum.[5][6] In 2003 she discovered the
X(3872) meson; a new kind of heavy particle, which does not fit the quantum model as it was made up of four
quarks.[3] Choi predicted the
X(3872) particle could be a
charmonium state or a DD* hadronic molecule. The work was confirmed by a team at the
Fermi National Accelerator Laboratory.[7] Choi went on to discover the
Y(3940), the
Zc(3900) and
Z(4430) particles, which proved that particles can exist in a range of forms.[8] Choi studied the decays of these extensively.[9][10][11]
She was involved with the study of other
charmonium states; using the ϒ(4S) and ϒ(5S) resonances at the
Belle detector.[12][13] Choi has collaborated with the
BES III experiment, which studied
center of mass energies between 2.9 and 4.42 GeV. The
BES III experiment identified new
charmonium states with non-zero electric charge.[14]
^Choi, Soo Kyung; Kim, Jihn E.; Lee, Taeyeon; Song, H. S. (1984-05-01). "Polarization of recoil-electron beam in high-energy M\o{}ller and Bhabha scattering". Physical Review D. 29 (9): 1909–1917.
Bibcode:
1984PhRvD..29.1909C.
doi:
10.1103/PhysRevD.29.1909.
^CHOI, Sookyung (2010-06-07). "Charmonium-like particles at Belle". Proceedings of European Physical Society Europhysics Conference on High Energy Physics — PoS(EPS-HEP 2009). p. 053.
doi:10.22323/1.084.0053.
^Choi, Sookyung (2011-01-29). "Spectroscopy results from Belle".
arXiv:1101.5691 [
hep-ex].
^Sookyung, Choi (2014-03-07). Hadron and Quarkmonium Exotica.
OCLC878584784.
^Sahoo, H.; et al. (Belle Collaboration) (2011-09-22). "Measurements of CP Violation in B Meson decays at Belle".
arXiv:1109.4780 [
hep-ex].
^Kou, E.; Urquijo, P.; et al. (Belle Collaboration) (2019). "The Belle II Physics Book". Progress of Theoretical and Experimental Physics. 2019 (12).
arXiv:1808.10567.
doi:
10.1093/ptep/ptz106.
^"7 Award-Winning Female Scientists". Asian Scientist Magazine | Science, technology and medical news updates from Asia. 2018-02-09. Retrieved 2019-01-14.