η meson decaysleptonic decaysThe search for the decay eta --> e+e- was carried out using the WASA detector at the COSY storage ring. Data were taken during a two week experimental run in Sept-Nov 2008 in which about 107 eta mesons were collected from the reaction of pp --> ppeta ...
Two-body B Meson Decays to eta and eta': Observation of B->eta K* In a sample of 19 million produced B mesons, we have observed the decays B ->\neta K* and improved our previous measurements of B -> eta'K. The branching\nfractions we measure for these decay modes are BR(B+ -...
学术范收录的Repository Study of the eta-->e+e-g Decay using WASA-at-COSY Detector System,目前已有全文资源,进入学术范阅读全文,查看参考文献与引证文献,参与文献内容讨论。学术范是一个在线学术交流社区,收录论文、作者、研究机构等信息,是一个与小木虫、知乎类
� Forbidden by C invariance of EM interaction in the SM � Offers the most sensitive means to constrain C violation in the EM decay of a hadron. � Current PDG experimental limits: BR(η→3 γ ) < 1.6x10-5 19 Light Dark Matter Particle ...
Weak Particle DecayMeetingsThe ETA collaboration is now building a large acceptance detector to investigate multiparticle decays of the (eta) meson and a few aspects of the Physics program are discussed. The perspectives of new researches on (eta) decays with a large acceptance detector are ...
The result of the first direct, precision measurement of the branching ratio for the decay of the eta meson into two photons, BR(eta --> gammagamma) equiv ... D White - 《Nippon Kagaku Kaishi》 被引量: 9发表: 1994年 Effects of nuclear symmetry energy on eta meson production and its ...
Eta->eta-pi-pi decayDashen theoremEta->3-piThe hadronic decays eta -> pi pi pi, eta-prime -> pi pi pi and eta-prime -> eta pi pi are investigated within a U(3) chiral unitary approach. Final state interactions are included by deriving the effective s-wave potentials for meson ...
Assuming that the chiral-symmetry-breaking Hamiltonian belongs to the (6,ifmmodebarelsetextasciimacronfi{}6) + (ifmmodebarelsetextasciimacronfi{}6,6) representation of SU(3) ensuremath{bigotimes} SU(3), we have estimated the width $ensuremath{Gamma}$ of the decay ${ensuremath{eta}}^{ens...
If mJ = 2mc is taken, the decay rates depend on 1 . m8 c (6) However, the value mc = 1.25 ± 0.09GeV[6] shows that mJ = 2mc is not a good approximation. Because of the cancellation between mJ and mc in the factor of Eqs.(3,4) {2m2 ? 3m2′ (1 + J η 2mc m3 ) ...