Atomki anomaly in gauged U(1)R symmetric model

Seto, Osamu; Shimomura, Takashi

doi:10.1007/jhep04(2021)025

Cited by 15 publications

(4 citation statements)

References 89 publications

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“…Recent experimental observations of the anomalous soft photons [1][2][3][4][5][6][7][8][9], the X17 particle at about 17 MeV [10][11][12], and the E38 particle at about 38 MeV [13][14][15], have generated a great deal of interests [16]- [29], [30][31][32][33][34][35][36][37][38][39][40][41]. With a mass in the region of many tens of MeV, the produced neutral objects appear to lie outside the domain of the Standard Model.…”

Section: Introductionmentioning

confidence: 99%

On the stability of the open-string QED neutron and dark matter

Wong

2020

Preprint

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We study the stability of a hypothetical QED neutron, which consists of a colorsinglet system of two d quarks and a u quark interacting with the quantum electrodynamical (QED) interactions. As a quark cannot be isolated, the intrinsic motion of the three quarks in the lowest-energy state of the QED neutron may lie predominantly in 1+1 dimensions, as in a d-u-d open string. In such an open string, the attractive d-u and u-d QED interactions may overcome the weaker repulsive d-d QED interaction to bind the three quarks together. We examine the stability of the QED neutron in a phenomenological three-body model in 1+1 dimensions with an effective interaction between electric charges extracted from Schwinger's exact QED solution in 1+1 dimensions. The phenomenological model in a variational calculation yields a stable QED neutron with a mass of 44.5 MeV. The analogous QED proton with two u quarks and a d quark has been found to be too repulsive to be stable and does not have a bound or continuum state, onto which the QED neutron can decay via the weak interaction. Consequently, the QED neutron may be stable against the weak decay and may have a very long lifetime. Such a particle may occur at the deconfinementto-confinement phase transition of the quark-gluon plasma and may be a signature of the deconfinement-to-confinement transition of the quark gluon plasma in high-energy heavyion collisions. Because of its long lifetime, self-gravitating QED neutron assemblies (and similarly QED antineutron assemblies) of various sizes may be good candidates for a part of the primordial dark matter produced during the deconfinement-to-confinement phase transition of the quark gluon plasma in the evolution of the early Universe. 1 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan)

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Section: Introductionmentioning

confidence: 99%

On the stability of the open-string QED neutron and dark matter

Wong

2020

Preprint

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“…We use the fact that, for m Z < 2 m µ , the branching ratio to neutrinos is 100%. This is favourable to neutrino telescopes, both those such as Super-Kamiokande [129], which are sensitive to light dark matter [130][131][132], as well as those most sensitive to heavier dark matter, such as KM3NeT.…”

Section: Anomaly-free L µ − L τ Modelmentioning

confidence: 99%

Robust limits from upcoming neutrino telescopes and implications on minimal dark matter models

Pree

Arina

Cheek

et al. 2021

J. Cosmol. Astropart. Phys.

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Experimental developments in neutrino telescopes are drastically improving their ability to constrain the annihilation cross-section of dark matter. In this paper, we employ an angular power spectrum analysis method to probe the galactic and extra-galactic dark matter signals. First we derive projections for a next generation of neutrino telescope that is inspired by KM3NeT. We emphasise that such analysis is much less sensitive to the choice of dark matter density profile. Remarkably, the projected sensitivity is improved by more than an order of magnitude with respect to the existing limits obtained by assuming the Burkert dark matter density profile describing the galactic halo. Second, we analyse minimal extensions to the Standard Model that will be maximally probed by the next generation of neutrino telescopes. As benchmark scenarios, we consider Dirac dark matter in s- and t-channel models with vector and scalar mediators. We follow a global approach by examining all relevant complementary experimental constraints. We find that neutrino telescopes will be able to competitively probe significant portions of parameter space. Interestingly, the anomaly-free L_μ-L_τ model can potentially be explored in regions where the relic abundance is achieved through freeze-out mechanism.

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“…local B −L model [8][9][10], local Baryon number model [9], extra U(1) gauge symmetry models [11][12][13][14][15], discussion associated with dark matter [16][17][18], and flavour physics etc. [19][20][21][22][23][24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Explaining Atomki anomaly and muon g − 2 in U(1)X extended flavour violating two Higgs doublet model

Nomura¹,

Sanyal

2021

J. High Energ. Phys.

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We investigate a two Higgs doublet model with extra flavour depending U(1)X gauge symmetry where Z′ boson interactions can explain the Atomki anomaly by choosing appropriate charge assignment for the SM fermions. For parameter region explaining the Atomki anomaly we obtain light scalar boson with $$ \mathcal{O} $$ O (10) GeV mass, and we explore scalar sector to search for allowed parameter space. We then discuss anomalous magnetic dipole moment of muon and lepton flavour violating processes induced by Yukawa couplings of our model.

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Atomki anomaly in gauged U(1)R symmetric model

Cited by 15 publications

References 89 publications

On the stability of the open-string QED neutron and dark matter

On the stability of the open-string QED neutron and dark matter

Robust limits from upcoming neutrino telescopes and implications on minimal dark matter models

Explaining Atomki anomaly and muon g − 2 in U(1)X extended flavour violating two Higgs doublet model

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