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Study of e+e- --> pi+ pi- pi0 process using initial state radiation with BABAR

高能物理 - 实验 2008-11-26 v1
作者: The BABAR Collaboration , B. Aubert
在 arXiv 上查看 ↗ PDF ↗ DOI ↗

摘要

The process e+e- --> pi+ pi- pi0 gamma has been studied at a center-of-mass energy near the Y(4S) resonance using a 89.3 fb-1 data sample collected with the BaBar detector at the PEP-II collider. From the measured 3pi mass spectrum we have obtained the products of branching fractions for the omega and phi mesons, B(omega --> e+e-)B(omega --> 3pi)=(6.70 +/- 0.06 +/- 0.27)10-5 and B(phi --> e+e-)B(phi --> 3pi)=(4.30 +/- 0.08 +/- 0.21)10-5, and evaluated the e+e- --> pi+ pi- pi0 cross section for the e+e- center-of-mass energy range 1.05 to 3.00 GeV. About 900 e+e- --> J/psi gamma --> pi+ pi- pi0 gamma events have been selected and the branching fraction B(J/psi --> pi+ pi- pi0)=(2.18 +/- 0.19)% has been measured.

关键词

electron-positron annihilation cross sections hadron decays branching fraction

引用

@article{arxiv.hep-ex/0408078,
  title  = {Study of e+e- --> pi+ pi- pi0 process using initial state radiation with BABAR},
  author = {The BABAR Collaboration and B. Aubert},
  journal= {arXiv preprint arXiv:hep-ex/0408078},
  year   = {2008}
}

备注

21 pages, 37 postscript figues, submitted to Phys. Rev. D

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