A study of photon production in hadronic e + e − annihilation
作者: W. BartelL. BeckerD. CordsR. FelstD. HaidtH. JungeG. KniesH. KrehbielP. LaurikainenR. MeinkeB. NaroskaJ. OlssonD. SchmidtP. SteffenG. DietrichJ. HagemannG. HeinzelmannH. KadoK. KawagoeC. KleinwortM. KuhlenK. MeierA. PetersenR. RamckeU. SchneeklothG. WeberK. AmbrusS. BethkeA. DieckmannE. ElsenJ. HeintzeK. H. HellenbrandS. KomamiyaJ. KroghP. LennertH. MatsumuraH. RiesebergJ. SpitzerA. WagnerC. BowderyA. FinchF. FosterG. Hughes
作者单位: 1Deutsches Elektronen-Synchrotron DESY
2II. Institut für Experimentalphysik der Universität
3Physikalisches Institut der Universität
5University of Maryland
6Rutherford Appleton Laboratory
7International Center for Elementary Particle Physics, University of Tokyo
10University of Helsinki
刊名: Zeitschrift für Physik C Particles and Fields, 1985, Vol.28 (3), pp.343-356
来源数据库: Springer Nature Journal
DOI: 10.1007/BF01413597
英文摘要: Abstract(#br)The production of photons in e + e − →γ+hadrons is investigated at three centre of mass energies around 14, 22 and 34 GeV. On average, photons carry 25% of the total available energy, with a multiplicity similar to the charged multiplicity. The inclusive photon spectra are found to scale with the centre of mass energy as a function of the Feynman variable x . π 0 and η mesons are reconstructed from their decay photons. The slopes of the spectra are similar to that for charged pions and approximate scaling is observed for π 0 production. The mean π 0 and η multiplicities are given. The observed photon yield can be fully accounted for by hadron decays and initial state radiation. However, up to one extra photon per event from other sources cannot be excluded.
全文获取路径: Springer Nature  (合作)

  • annihilation 消灭
  • study 学习
  • photon 光量子
  • production 生产