Muon g-2 discrepancy:new physics or a relatively light Higgs?

摘要：

After a brief review of the muon g-2 status,we discuss hypothetical errors in the Standard Model prediction that might explain the present discrepancy with the experimental value.None of them seems likely.In particular,a hypothetical increase of the hadroproduction cross section in low-energy e+e-collisions could bridge the muon g-2 discrepancy,but it is shown to be unlikely in view of current experimental error estimates.If,nonetheless,this turns out to be the explanation of the discrepancy,then the 95％ CL upper bound on the Higgs boson mass is reduced to about 135 GeV which,in conjunction with the experimental 114.4 GeV 95％CL lower bound,leaves a narrow window for the mass of this fundamental particle.

关键词： muon anomalous magnetic moment Standard Model Higgs boson

作者: M.Passera W.J.Marciano A.Sirlin

作者单位: Istituto Nazionale Fisica Nucleare,Sezione di Padova,I-35131,Padova,Italy Brookhaven National Laboratory,Upton,New York 11973,USA Department of Physics,New York University,10003 New York NY,USA

会议类型: 国际会议

会议名称: 国际φ电子到ψ电子正负电子碰撞研讨会

会议地点: 北京

会议语种:英文

页码: 735-740

在线出版日期: 2009-10-13（万方平台首次上网日期，不代表论文的发表时间）