Search for muon-philic new light gauge boson at Belle II

Abstract

Motivated by the long-lasting $3.5\sigma$ discrepancy in the anomalous magnetic moment of muon, we consider a new muon-specific force mediated by a light gauge boson, $X$, with mass $m_X<2m_{\mu }$ and the coupling constant $g_X\sim (10^{-4},10^{-3})$. We show that the Belle~II experiment has a robust chance to probe such a light boson in $e^{+}{e}^{-}\to {\mu }^{+}{\mu }^{-}+X$ channel and cover the most interesting parameter space explaining the discrepancy with the planned target luminosity, $\int dt\mathcal{L}=50\mathrm{a}{\mathrm{b}}^{-1}$. 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 ($m_X\le 2m_{\mu }$) gauge boson can be probed down to $g_X\ge 1.5\times 10^{-4}(4.6\times 10^{-4},2.3\times 10^{-4})$ for 50 (1, 10) ab${}^{-1}$ search.

arXiv comment21 pages, 12 figures, references added, version to appear in JHEP

References in corpus (31)

• FeynRules 2.0 - A complete toolbox for tree-level phenomenology
• MadGraph 5 : Going Beyond
• Higgs mass and vacuum stability in the Standard Model at NNLO
• The Muon g-2
• Investigating the near-criticality of the Higgs boson
• Measurement of the Negative Muon Anomalous Magnetic Moment to 0.7 ppm
• The Muon Anomalous Magnetic Dipole Moment in the Minimal Supersymmetric Standard Model
• Precise Measurement of the Positive Muon Anomalous Magnetic Moment
• Search for a dark photon in e+e- collisions at BABAR
• Neutrino Trident Production: A Powerful Probe of New Physics with Neutrino Beams
• The Muon Anomalous Magnetic Moment: A Harbinger For "New Physics"
• Calculation of the hadronic vacuum polarization contribution to the muon anomalous magnetic moment
• Weak Corrections are Relevant for Dark Matter Indirect Detection
• Search for Invisible Decays of a Dark Photon Produced in e+e- Collisions at BaBar
• Hunting All the Hidden Photons
• New Exclusion Limits on Dark Gauge Forces from Proton Bremsstrahlung in Beam-Dump Data
• Cosmology With a Very Light $L_{\mu }-L_{\tau }$ Gauge Boson
• New measurement of the K+ => pi+,nu,nubar branching ratio
• Higgs inflation still alive
• New Exclusion Limits for Dark Gauge Forces from Beam-Dump Data
• Constraints on sub-GeV hidden sector gauge bosons from a search for heavy neutrino decays
• New constraints on light vectors coupled to anomalous currents
• M${}^3$: A New Muon Missing Momentum Experiment to Probe $(g-2{)}_{\mu }$ and Dark Matter at Fermilab
• Possible Light U(1) Gauge Boson Coupled to Baryon Number
• Self-interacting dark matter and muon $g-2$ in a gauged U$(1{)}_{L_{\mu }-L_{\tau }}$ model
• TauDecay: a library to simulate polarized tau decays via FeynRules and MadGraph5
• Towards Collinear Evolution Equations in Electroweak Theory
• Electroweak Evolution Equations
• Muon anomalous magnetic moment and the stabilized Randall-Sundrum scenario
• Probing a dark photon using rare leptonic kaon and pion decays
• $L_{\mu }-L_{\tau }$ gauge-boson production from lepton flavor violating $\tau$ decays at Belle II

Cited by in corpus (21)

• Muonic Force Behind Flavor Anomalies
• Searching for muonic forces with the ATLAS detector
• Probing $\mu \tau$ flavor-violating solutions for the muon $g-2$ anomaly at Belle II
• Light gauge boson interpretation for $(g-2{)}_{\mu }$ and the $K_L\to {\pi }^0+\text{(invisible)}$ anomaly at the J-PARC KOTO experiment
• Low Scale $U(1{)}_X$ Gauge Symmetry as an Origin of Dark Matter, Neutrino Mass and Flavour Anomalies
• A Custodial Symmetry for Muon g-2
• Low scale seesaw models for low scale $U(1{)}_{L_{\mu }-L_{\tau }}$ symmetry
• Displaced Searches for Light Vector Bosons at Belle II
• Search for $Z^{{}^{\prime }}\to {\mu }^{+}{\mu }^{-}$ in the $L_{\mu }-L_{\tau }$ gauge-symmetric model at Belle
• Search for new light vector boson using $J/\Psi$ at BESIII and Belle II
• Probing the $L_{\mu }-L_{\tau }$ gauge boson at electron colliders
• Kinematical distributions of coherent neutrino trident production in gauged $L_{\mu }-L_{\tau }$ model
• Anomalous and axial Z' contributions to g-2
• Search for $Z^{\prime }$ pair production from scalar boson decay in minimal $U(1{)}_{L_{\mu }-L_{\tau }}$ model at the LHC
• A comprehensive study of vector leptoquark with $U(1{)}_{B_3-L_2}$ on the $B$-meson and Muon g-2 anomalies
• Probing new physics scenarios of muon $g-2$ via $J/\psi$ decay at BESIII
• Light Dilaton in Rare Meson Decays and Extraction of its CP Property
• Prospects of five-dimensional $L_{\mu }-L_{\tau }$ gauge interactions in the light of elastic neutrino-electron scatterings: The scope of the DUNE near detector
• Methodology to determine the spin-parity of muon-philic $X$ boson in $J/\psi \to {\mu }^{-}{\mu }^{+}X$ decay
• Explaining lepton-flavor non-universality and self-interacting dark matter with $L_{\mu }-L_{\tau }$
• Constraining self-interacting ultrahigh-energy muon neutrinos by cosmic microwave background spectral distortion