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High Energy Physics - Phenomenology

arXiv:2304.04439 (hep-ph)
[Submitted on 10 Apr 2023 (v1), last revised 21 Nov 2023 (this version, v2)]

Title:Unparticle effects at the MUonE experiment

Authors:Duc Ninh Le, Van Dung Le, Duc Truyen Le, Van Cuong Le
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Abstract:We investigate possible effects of unparticles at the MUonE experiment by considering a general model for unparticle with broken scale invariance, characterized by the scaling dimension $d$ and the energy scale $\mu$ at which the scale invariance is broken. Taking into account available relevant constraints on the couplings of the unparticles with the Standard Model (SM) leptons, we found that the MUonE experiment at the level of 10 ppm systematic accuracy is sensitive to such effects if $1<d\lesssim 1.4$ and $1\le \mu \lesssim 12$ GeV for vector unparticles. The effects of scalar unparticles are too feeble to be detected. The vector unparticles can induce a significant shift on the best-fit value of $a_\mu^\text{had}$ at the MUonE, thereby providing an opportunity to detect unparticles or to obtain a new bound on the unparticle-SM couplings in the case of no anomaly.
Comments: 16 pages, 6 figures, 3 tables; matches journal version
Subjects: High Energy Physics - Phenomenology (hep-ph); High Energy Physics - Experiment (hep-ex)
Cite as: arXiv:2304.04439 [hep-ph]
  (or arXiv:2304.04439v2 [hep-ph] for this version)
  https://doi.org/10.48550/arXiv.2304.04439

Submission history

From: Duc Ninh Le [view email]
[v1] Mon, 10 Apr 2023 07:53:03 UTC (100 KB)
[v2] Tue, 21 Nov 2023 17:05:12 UTC (103 KB)
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