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Title: | What can a heavy U(1)B−L Z 0 boson do to the muon (g − 2)µ anomaly and to a new Higgs boson mass? |
Author: | Pasechnik, Roman Morais, António P. Rodrigues, João Pedro |
Keywords: | Beyond Standard Model Higgs Physics Gauge extensions of the Standard Model Z' boson |
Issue Date: | 2020 |
Publisher: | IOP Publishing |
Abstract: | The minimal $U(1)_{B-L}$ extension of the Standard Model (B-L-SM) offers an explanation for neutrino mass generation via a seesaw mechanism as well as contains two new physics states such as an extra Higgs boson and a new $Z'$ gauge boson. The emergence of a second Higgs particle as well as a new $Z^\prime$ gauge boson, both linked to the breaking of a local $U(1)_{B-L}$ symmetry, makes the B-L-SM rather constrained by direct searches at the Large Hadron Collider (LHC) experiments. We investigate the phenomenological status of the B-L-SM by confronting the new physics predictions with the LHC and electroweak precision data. Taking into account the current bounds from direct LHC searches, we demonstrate that the prediction for the muon $(g-2)_\mu$ anomaly in the B-L-SM yields at most a contribution of approximately $8.9 \times 10^{-12}$ which represents a tension of $3.28$ standard deviations, with the current $1\sigma$ uncertainty, by means of a $Z^\prime$ boson if its mass lies in a range of $6.3$ to $6.5$ TeV, within the reach of future LHC runs. This means that the B-L-SM, with heavy yet allowed $Z^\prime$ boson mass range, in practice does not resolve the tension between the observed anomaly in the muon $(g-2)_\mu$ and the theoretical prediction in the Standard Model. Such a heavy $Z^\prime$ boson also implies that the minimal value for a new Higgs mass is of the order of 400 GeV. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/29889 |
DOI: | 10.1088/1674-1137/abc16a |
ISSN: | 1674-1137 |
Appears in Collections: | CIDMA - Artigos DFis - Artigos GGDG - Artigos |
Files in This Item:
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2020_Chinese_Phys.pdf | 783.36 kB | Adobe PDF | View/Open |
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