排序方式: 共有17条查询结果,搜索用时 31 毫秒
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S. Youssef P. Franzini D. Son P.M. Tuts T. Zhao M. Sivertz J.E. Horstkotte C. Klopfenstein J. Lee-Franzini L. Romero R.D. Schamberger S.W. Herb K. Han R. Imlay G. Levman W. Metcalf V. Sreedhar H. Dietl V. Fonseca 《Physics letters. [Part B]》1984,139(4):332-336
We have searched for the decay of ?'s into a monochromatic photon accompanied by other particles as a signal for the reaction ?→γ+Higgs. Two different methods are presented both with null result. While we are not sensitive to the branching ratios predicted by the standard model with a minimal Higgs content, we can put limits on the possible values of the lowest Higgs mass and the ratio of the vacuum expectation values for more complex models. Our results are also of interest with respect to the ξ(2.2) being a Higgs in the context of such models. 相似文献
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C. Klopfenstein J. E. Horstkotte J. Lee-Franzini R. D. Schamberger M. Sivertz L. J. Spencer P. M. Tuts 《Physics letters. [Part B]》1983,130(6):444-448
Using the CUSB detector we have measured the production of electrons from the decay B→eνX. We obtain a branching ratio for B→eνX of (13.2±0.8±1.4)%. The observed energy spectrum of the electrons implies that the coupling (bc)W dominates over (bu)W. An upper limit Γ(B→eνXu)/Γ(B→eνXc)<5.5% at 90% confidence level is obtained, where Xc contains a c-quark and Xu contains no charmed particles. 相似文献
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S. Childress P. Franzini J. Lee-Franzini R.L. McCarthy R.D. Schamberger P.M. Tuts 《Physics letters. [Part B]》1976,65(2):177-180
We have measured at 500 GeV the cross section for the inclusive reaction p + p → + X. We determine the mass spectrum of the diffractive peak to be and the scaling part of the cross section to be dσ/dMX2 = (15.7±1.1)/smb/GeV2. 相似文献