TY - JOUR
T1 - Determination of the ς+ Timelike Electromagnetic Form Factors
AU - Ablikim, M.
AU - Achasov, M. N.
AU - Adlarson, P.
AU - Ai, X. C.
AU - Kabana, S.
AU - The BESIII collaboration
N1 - Publisher Copyright:
© 2024 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.
PY - 2024/2/23
Y1 - 2024/2/23
N2 - Based on data samples collected with the BESIII detector at the BEPCII collider, the process e+e-→ς+ς¯- is studied at center-of-mass energies s=2.3960, 2.6454, and 2.9000 GeV. Using a fully differential angular description of the final state particles, both the relative magnitude and phase information of the ς+ electromagnetic form factors in the timelike region are extracted. The relative phase between the electric and magnetic form factors is determined to be sinΔφ=-0.67±0.29(stat)±0.18(syst) at s=2.3960 GeV, Δφ=55°±19°(stat)±14°(syst) at s=2.6454 GeV, and 78°±22°(stat)±9°(syst) at s=2.9000 GeV. For the first time, the phase of the hyperon electromagnetic form factors is explored in a wide range of four-momentum transfer. The evolution of the phase along with four-momentum transfer is an important input for understanding its asymptotic behavior and the dynamics of baryons.
AB - Based on data samples collected with the BESIII detector at the BEPCII collider, the process e+e-→ς+ς¯- is studied at center-of-mass energies s=2.3960, 2.6454, and 2.9000 GeV. Using a fully differential angular description of the final state particles, both the relative magnitude and phase information of the ς+ electromagnetic form factors in the timelike region are extracted. The relative phase between the electric and magnetic form factors is determined to be sinΔφ=-0.67±0.29(stat)±0.18(syst) at s=2.3960 GeV, Δφ=55°±19°(stat)±14°(syst) at s=2.6454 GeV, and 78°±22°(stat)±9°(syst) at s=2.9000 GeV. For the first time, the phase of the hyperon electromagnetic form factors is explored in a wide range of four-momentum transfer. The evolution of the phase along with four-momentum transfer is an important input for understanding its asymptotic behavior and the dynamics of baryons.
UR - https://www.scopus.com/pages/publications/85186195209
U2 - 10.1103/PhysRevLett.132.081904
DO - 10.1103/PhysRevLett.132.081904
M3 - Article
C2 - 38457707
AN - SCOPUS:85186195209
SN - 0031-9007
VL - 132
JO - Physical Review Letters
JF - Physical Review Letters
IS - 8
M1 - 081904
ER -