A light scalar explanation of (g − 2)μ and the KOTO anomaly

@article{Liu2020ALS,
  title={A light scalar explanation of (g − 2)$\mu$ and the KOTO anomaly},
  author={Jia Liu and Navin McGinnis and C. E. M. Wagner and Xiao-ping Wang},
  journal={arXiv: High Energy Physics - Phenomenology},
  year={2020}
}
The KOTO experiment has recently performed a search for neutral Kaons decaying into neutral pions and a pair of neutrinos. Three events were observed in the KOTO signal region, with an expected background of about 0.05. Since no clear signal of systematic errors have been found, the excess of events in the decay $K_{L}\rightarrow\pi^0\nu\bar{\nu}$ is quite intriguing. One possibility to explain this anomaly would be the presence of a scalar $\phi$ with mass of the order of the pion mass and… Expand

Figures and Tables from this paper

The Tiny (g-2) Muon Wobble from Small-$\mu$ Supersymmetry
A new measurement of the muon anomalous magnetic moment has been recently reported by the Fermilab Muon g-2 collaboration and shows a $4.2\,\sigma$ departure from the most precise and reliableExpand
Understanding the MiniBooNE and the muon and electron g − 2 anomalies with a light Z′ and a second Higgs doublet
Two of the most widely studied extensions of the Standard Model (SM) are a) the addition of a new U(1) symmetry to its existing gauge groups, and b) the expansion of its scalar sector to incorporateExpand
Light gauge boson interpretation for (g − 2)μ and the KL→ π0 + (invisible) anomaly at the J-PARC KOTO experiment
We discuss a list of possible light gauge boson interpretations for the long-standing experimental anomaly in $(g-2)_\mu$ and also recent anomalous excess in $K_L \rightarrow \pi^0 +Expand
A Dark Seesaw Solution to Low Energy Anomalies: MiniBooNE, the muon $(g-2)$, and BaBar
A recent update from MiniBooNE has strengthened the observed $4.8\sigma$ excess of $e$-like events. Motivated by this and other notable deviations from standard model predictions, such as the muonExpand
KOTO vs. NA62 dark scalar searches
The two kaon factories, KOTO and NA62, are at the cutting edge of the intensity frontier, with an unprecedented numbers of long lived and charged Kaons, ~ 10^{13}, being measured and analyzed. TheseExpand
(g − 2)μ versus K → π + Emiss induced by the (B − L)23 boson
Abstract To address the long-standing (g − 2)μ anomaly via a light boson, in ref. [1] we proposed to extend the standard model (SM) by the local (B − L)23, under which only the second and thirdExpand
Implications of b → sμμ anomalies for future measurements of B→K(⁎)νν¯ and K→πνν¯
Abstract We investigate the consequences of deviations from the Standard Model observed in b → s μ μ transitions for flavour-changing neutral-current processes involving down-type quarks andExpand
Rare kaon decays and CP violation
Owing to the strong suppression of flavour-changing neutral-current transitions in the Standard Model, rare kaon decays constitute a superb tool to constrain hypothetical new-physics interactions. AtExpand
Breaking the Grossman-Nir bound in kaon decays
The ratio ℬ K L → π 0 v v ¯ / ℬ K + → π + v v ¯ $$ \mathrm{\mathcal{B}}\left({K}_L\to {\pi}^0v\overline{v}\right)/\mathrm{\mathcal{B}}\left({K}^{+}\to {\pi}^{+}v\overline{v}\right) $$ of theExpand
Higgs portal from the atmosphere to Hyper-K
A light Higgs portal scalar could be abundantly produced in the earth's atmosphere and decay in large-volume neutrino detectors. We propose broadening the purpose of the Hyper-Kamiokande detector toExpand
...
1
2
3
...

References

SHOWING 1-10 OF 120 REFERENCES
Constraints on long-lived light scalars with flavor-changing couplings and the KOTO anomaly
Recently, the KOTO experiment at J-PARC has observed three anomalous events in the flavor-changing rare decay $K_L \to \pi^0 \nu \bar\nu$, which indicates that the corresponding branching ratio isExpand
Resolving the (g−2)μ and B anomalies with leptoquarks and a dark Higgs boson
At present, there are outstanding discrepancies between standard model predictions and measurements of the muon's $g-2$ and several $B$-meson properties. We resolve these anomalies by considering aExpand
Light gauge boson interpretation for (g − 2)μ and the KL→ π0 + (invisible) anomaly at the J-PARC KOTO experiment
We discuss a list of possible light gauge boson interpretations for the long-standing experimental anomaly in $(g-2)_\mu$ and also recent anomalous excess in $K_L \rightarrow \pi^0 +Expand
Lepton flavor-changing scalar interactions and g-2 of the muon
Abstract. A systematic investigation on the muon's anomalous magnetic moment and a related lepton flavor-violating process such as $\mu\to e\gamma$, $\tau\to e\gamma$ and $\tau\to \mu\gamma$ is madeExpand
Implication of K→πνν¯ for generic neutrino interactions in effective field theories
In this work we investigate the implication of $K\to \pi \nu \bar{\nu}$ from the recent KOTO and NA62 measurements for generic neutrino interactions and the new physics scale in effective fieldExpand
A Call for New Physics : The Muon Anomalous Magnetic Moment and Lepton Flavor Violation
Abstract We review how the muon anomalous magnetic moment ( g − 2 ) and the quest for lepton flavor violation are intimately correlated. Indeed the decay μ → e γ is induced by the same amplitude forExpand
Probing a pseudoscalar at the LHC in light of $R(D^{(*)})$ and muon g-2 excesses
We study the excesses of $R(D^{(*)})$ and muon $g-2$ in the framework of a two-Higgs-doublet model with top quark flavor-changing neutral-current (FCNC) couplings. Considering the relevantExpand
The muon g ― 2
Abstract The muon anomalous magnetic moment is one of the most precisely measured quantities in particle physics. In a recent experiment at Brookhaven it has been measured with a remarkable 14-foldExpand
Probing a pseudoscalar at the LHC in light of muon g − 2 and R(D(⁎)) excesses
Abstract We study the excesses of muon g − 2 and R ( D ( ⁎ ) ) in the framework of a two-Higgs-doublet model with top quark flavor-changing neutral-current (FCNC) couplings. Considering the relevantExpand
Implications of a light “dark Higgs” solution to the g μ − 2 discrepancy
A light scalar Φ with mass ≲1 GeV and muonic coupling O(10-3) would explain the 3.5σ discrepancy between the Standard Model (SM) muon g-2 prediction and experiment. Such a scalar can be associatedExpand
...
1
2
3
4
5
...