Abstract
Motivated by the long-lasting 3.5σ discrepancy in the anomalous magnetic moment of muon, we consider a new muon-specific force mediated by a light gauge boson, X, with mass mX < 2mμ and the coupling constant gX ∼ (10−4, 10−3). We show that the Belle II experiment has a robust chance to probe such a light boson in e+e− → μ+μ− + X channel and cover the most interesting parameter space explaining the discrepancy with the planned target luminosity, ∫dtL=50ab−1. The clean signal of muon-pair plus missing energy at Belle II can be a smoking gun for the new gauge boson. We expect that the (invisibly decaying) muon-philic light (mX ≲ 2mμ) gauge boson can be probed down to gX ≲ 1.5 × 10−4(4.6 × 10−4, 2.3 × 10−4) for 50 (1, 10) ab−1 search.
| Original language | English |
|---|---|
| Article number | 168 |
| Journal | Journal of High Energy Physics |
| Volume | 2019 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 2019 Oct 1 |
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All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
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Search for muon-philic new light gauge boson at Belle II. / Jho, Yongsoo; Kwon, Youngjoon; Park, Seong Chan; Tseng, Po Yan.
In: Journal of High Energy Physics, Vol. 2019, No. 10, 168, 01.10.2019.Research output: Contribution to journal › Article
TY - JOUR
T1 - Search for muon-philic new light gauge boson at Belle II
AU - Jho, Yongsoo
AU - Kwon, Youngjoon
AU - Park, Seong Chan
AU - Tseng, Po Yan
PY - 2019/10/1
Y1 - 2019/10/1
N2 - Motivated by the long-lasting 3.5σ discrepancy in the anomalous magnetic moment of muon, we consider a new muon-specific force mediated by a light gauge boson, X, with mass mX < 2mμ and the coupling constant gX ∼ (10−4, 10−3). We show that the Belle II experiment has a robust chance to probe such a light boson in e+e− → μ+μ− + X channel and cover the most interesting parameter space explaining the discrepancy with the planned target luminosity, ∫dtL=50ab−1. The clean signal of muon-pair plus missing energy at Belle II can be a smoking gun for the new gauge boson. We expect that the (invisibly decaying) muon-philic light (mX ≲ 2mμ) gauge boson can be probed down to gX ≲ 1.5 × 10−4(4.6 × 10−4, 2.3 × 10−4) for 50 (1, 10) ab−1 search.
AB - Motivated by the long-lasting 3.5σ discrepancy in the anomalous magnetic moment of muon, we consider a new muon-specific force mediated by a light gauge boson, X, with mass mX < 2mμ and the coupling constant gX ∼ (10−4, 10−3). We show that the Belle II experiment has a robust chance to probe such a light boson in e+e− → μ+μ− + X channel and cover the most interesting parameter space explaining the discrepancy with the planned target luminosity, ∫dtL=50ab−1. The clean signal of muon-pair plus missing energy at Belle II can be a smoking gun for the new gauge boson. We expect that the (invisibly decaying) muon-philic light (mX ≲ 2mμ) gauge boson can be probed down to gX ≲ 1.5 × 10−4(4.6 × 10−4, 2.3 × 10−4) for 50 (1, 10) ab−1 search.
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U2 - 10.1007/JHEP10(2019)168
DO - 10.1007/JHEP10(2019)168
M3 - Article
AN - SCOPUS:85073627387
VL - 2019
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
SN - 1126-6708
IS - 10
M1 - 168
ER -