Unparticle physics with broken scale invariance

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• 作者：Vernon Barger ; Yu Gao ; Wai-Yee Keung ; Danny Marfatia ; V. Nefer Ş ; enoğ ; uz
• 关键词：Comahue ; BOM contract ; GEEAC ; Auctions ; Transener ; Transmission
• 刊名：Physics Letters B
• 出版年：2008
• 出版时间：27 March 2008
• 年：2008
• 卷：661
• 期：4
• 页码：276-286
• 全文大小：1201 K

文摘

If scale invariance is exact, unparticles are unlikely to be probed in colliders since there are stringent constraints from astrophysics and cosmology. However these constraints are inapplicable if scale invariance is broken at a scale style=""text-decoration:none; color:black"" href=""/science?_ob=MathURL&_method=retrieve&_udi=B6TVN-4RWBSWH-3&_mathId=mml55&_user=1067359&_cdi=5539&_rdoc=9&_acct=C000050221&_version=1&_userid=10&md5=41f0cd883bb0eaeac2fc78f0e904768e"" title=""Click to view the MathML source"" alt=""Click to view the MathML source"">μsrc=""http://www.sciencedirect.com/scidirimg/entities/2273.gif"" alt=""greater-than or equivalent to"" title=""greater-than or equivalent to"" border=""0"">1 GeV. The case style=""text-decoration:none; color:black"" href=""/science?_ob=MathURL&_method=retrieve&_udi=B6TVN-4RWBSWH-3&_mathId=mml56&_user=1067359&_cdi=5539&_rdoc=9&_acct=C000050221&_version=1&_userid=10&md5=0fb687ddacb27f7f753b2bb19ef641c9"" title=""Click to view the MathML source"" alt=""Click to view the MathML source"">1 GeVsrc=""http://www.sciencedirect.com/scidirimg/entities/2272.gif"" alt=""less, approximate"" title=""less, approximate"" border=""0"">μ<M<sub>Zsub> is particularly interesting since it allows unparticles to be probed at and below the Z pole. We show that μ can naturally be in this range if only vector unparticles exist, and briefly remark on implications for Higgs phenomenology. We then obtain constraints on unparticle parameters from style=""text-decoration:none; color:black"" href=""/science?_ob=MathURL&_method=retrieve&_udi=B6TVN-4RWBSWH-3&_mathId=mml57&_user=1067359&_cdi=5539&_rdoc=9&_acct=C000050221&_version=1&_userid=10&md5=dbeeb38702a09148969c86c6f71f69f4"" title=""Click to view the MathML source"" alt=""Click to view the MathML source"">e<sup>+sup>e<sup>−sup>→μ<sup>+sup>μ<sup>−sup> cross-section and forward–backward asymmetry data, and compare with the constraints from mono-photon production and the Z hadronic width.