Skip to content
DraconiticResearch
Search Sources API
203,203 studies31 sourcesUpdated 46 min ago
PreprintCC BY 4.0arXiv

Measurement of e+ e−→ pp̅ around ψ(2S) with scan method

  • The BESIII Collaboration
Open at sourcePDFDOICite

Abstract

This paper uses the data corresponding to an integrated luminosity of $495pb^{-1}$ in the center-of-mass energy region from 3.58~GeV to 3.71~GeV to study the relative phase between strong and electromagnetic amplitudes in the ψ(2S)→ pp̅ decay. The cross sections and the effective form factors around ψ(2S) of proton-antiproton pairs are presented thereby filling the gap in the experimental results around the ψ(2S) resonance for the first time, and the results are consistent with the previous BESIII and BaBar results. The relative phase is extracted from the cross-section line shape as Φg,γ=(105.9±9.4)∘ or Φg,γ=(−105.3±9.1)∘. Correspondingly, two solutions for the ψ(2S)→ pp̅ branching fractions are obtained as ℬ=(3.21±0.13)×10−4 and ℬ=(3.47±0.19)×10−4. These results support the universality of the phase and provide new insights into its underlying mechanism.

Related

  1. Differential measurement of global polarization of Λ, Ξ, and Ω hyperons in Au+Au collisions at √(sNN)=7.7--27 GeV from the RHIC Beam Energy Scan-II
    The STAR Collaboration
    arXivPreprintCC BY-NC-ND 4.0Full textNuclear physicsarXiv
  2. Research on the mechanism of DBO measurement errors caused by wafer warpage and a U-turn compensation method
    Wenxiao Zhang, Honghui Feng, Xu Wang +3
    Optics ExpressPeer-reviewedLicence not statedOptics & photonicsCrossref
  3. Method for Meteorological Optical Range Measurement Traceability Based on Programmable Spectral Shaping
    Taiyang Ren, Yu Zhang, Jian Zhang +9
    Optics ExpressPeer-reviewedLicence not statedOptics & photonicsCrossref
  4. A New Precise Measurement of the e+e-→π+π-(γ) Cross Section with the Initial-State Radiation Method at BaBar
    BaBar Collaboration
    arXivPreprintCC BY 4.0Full textHigh-energy & particle physicsarXiv
  5. A New Precise Measurement of the e+e-→π+π-(γ) Cross Section with the Initial-State Radiation Method at BaBar
    BaBar Collaboration
    arXivPreprintCC BY 4.0Full textHigh-energy & particle physicsarXiv

Cite

BibTeXRIS
BibTeX
@misc{collaboration2026measurement,
  title = {{Measurement of $e^+ e^-\to p\barp$ around $ψ(2S)$ with scan method}},
  author = {The BESIII Collaboration},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2608.15074},
  eprint = {2608.15074},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2608.15074},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Measurement of e^+ e^−→ pp̅ around ψ(2S) with scan method
AU  - The BESIII Collaboration
PY  - 2026
DA  - 2026/10/11
PB  - arXiv
DO  - 10.48550/arxiv.2608.15074
UR  - https://arxiv.org/abs/2608.15074
AB  - This paper uses the data corresponding to an integrated luminosity of $495pb^{-1}$ in the center-of-mass energy region from 3.58~GeV to 3.71~GeV to study the relative phase between strong and electromagnetic amplitudes in the ψ(2S)→ pp̅ decay. The cross sections and the effective form factors around ψ(2S) of proton-antiproton pairs are presented thereby filling the gap in the experimental results around the ψ(2S) resonance for the first time, and the results are consistent with the previous BESIII and BaBar results. The relative phase is extracted from the cross-section line shape as Φ_g,γ=(105.9±9.4)^∘ or Φ_g,γ=(−105.3±9.1)^∘. Correspondingly, two solutions for the ψ(2S)→ pp̅ branching fractions are obtained as ℬ=(3.21±0.13)×10^−4 and ℬ=(3.47±0.19)×10^−4. These results support the universality of the phase and provide new insights into its underlying mechanism.
ER  -