Constraints on New Physics in Electron g−2 from a Search for Invisible Decays of a Scalar, Pseudoscalar, Vector, and Axial Vector; Physical Review Letters; Vol. 126, iss. 21
| Parent link: | Physical Review Letters Vol. 126, iss. 21.— 2021.— [211802, 6 p.] |
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| Συλλογικό Έργο: | , |
| Άλλοι συγγραφείς: | , , , , , , , |
| Περίληψη: | Title screen We performed a search for a new generic X boson, which could be a scalar (S), pseudoscalar (P), vector (V), or an axial vector (A) particle produced in the 100 GeV electron scattering off nuclei, e−Z→e−ZX, followed by its invisible decay in the NA64 experiment at CERN. No evidence for such a process was found in the full NA64 dataset of 2.84×1011 electrons on target. We place new bounds on the S, P, V, A coupling strengths to electrons, and set constraints on their contributions to the electron anomalous magnetic moment ae, |ΔaX|≲10−15-10−13 for the X mass region 1 MeV≲mX≲1 GeV. These results are an order of magnitude more sensitive compared to the current accuracy on ae from the electron g−2 experiments and recent high-precision determination of the fine structure constant. |
| Γλώσσα: | Αγγλικά |
| Έκδοση: |
2021
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| Θέματα: | |
| Διαθέσιμο Online: | https://doi.org/10.1103/PhysRevLett.126.211802 |
| Μορφή: | Ηλεκτρονική πηγή Κεφάλαιο βιβλίου |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=668067 |