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Large Two-Loop Contributions to g-2 from a Generic Pseudoscalar Boson | | Darwin Chang
; We-Fu Chang
; Chung-Hsien Chou
; Wai-Yee Keung
; | | Date: |
26 Sep 2000 | | Journal: | Phys.Rev. D63 (2001) 091301 | | Subject: | hep-ph | | Abstract: | We calculate the dominant contributions to the muon $g-2$ at the two-loop level due to a generic pseudoscalar boson that may exist in any exotic Higgs sector in most extensions of the standard model. The leading effect comes from diagrams of the Barr-Zee type. A sufficiently light pseudoscalar Higgs boson can give rise to contribution as large as the electroweak contribution which is measurable in the next round of $g-2$ experiment. Through the contribution we calculated here, the anticipated improved data in the recent future on the muon $g-2$ can put the best limit on the possible existence of a light pseudoscalar boson in physics beyond the standard model. | | Source: | arXiv, hep-ph/0009292 | | Services: | Forum | Review | PDF | Favorites | |
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