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Non-vanishing electromagnetic properties of the neutrinos have been predicted by many theories beyond the Standard Model, and an enhanced neutrino magnetic moment can have profound implications for fundamental physics. The XENON1T…

High Energy Physics - Experiment · Physics 2021-12-22 Ziping Ye , Feiyang Zhang , Donglian Xu , Jianglai Liu

We present updated constraints on 'light' Dark Matter (DM) particles with masses between 1 MeV and 5 GeV. In this range, we can expect DM-produced $e^\pm$ pairs to up-scatter low-energy ambient photons in the Milky Way via the Inverse…

High Energy Physics - Phenomenology · Physics 2024-01-17 Jordan Koechler

Direct detection experiments turn to lose sensitivity of searching for a sub-MeV light dark matter candidate due to the threshold of recoil energy. However, such light dark matter particles can be accelerated by energetic cosmic-rays such…

High Energy Physics - Phenomenology · Physics 2021-05-26 Qing-Hong Cao , Ran Ding , Qian-Fei Xiang

We investigate the landscape of constraints on MeV-GeV scale, hidden U(1) forces with nonzero axial-vector couplings to Standard Model fermions. While the purely vector-coupled dark photon, which may arise from kinetic mixing, is a…

High Energy Physics - Phenomenology · Physics 2017-05-24 Yonatan Kahn , Gordan Krnjaic , Siddharth Mishra-Sharma , Tim M. P. Tait

We perform a consistent modeling of cosmic ray electrons, positrons and of the radio emission of the Galaxy. For the time we reproduce all relevant data sets between 1 GeV and 1 TeV including the recent AMS-02 positron fraction results. We…

High Energy Astrophysical Phenomena · Physics 2013-07-01 D. Grasso , G. Di Bernardo , C. Evoli , D. Gaggero , L. Maccione

We explore a "partial unification" model that could explain the diphoton event excess around $750 \, \rm GeV$ recently reported by the LHC experiments. A new strong gauge group is combined with the ordinary color and hypercharge gauge…

High Energy Physics - Phenomenology · Physics 2016-10-12 Howard Georgi , Yuichiro Nakai

The 2-10 keV continuum of AGN is generally well represented by a single power law. However, at smaller energies the continuum displays an excess with respect to the extrapolation of this power law, called the ''soft X-ray excess''. Until…

The EDGES Collaboration has recently reported the detection of a stronger-than-expected absorption feature in the global 21-cm spectrum, centered at a frequency corresponding to a redshift of z ~ 17. This observation has been interpreted as…

High Energy Physics - Phenomenology · Physics 2018-07-11 Asher Berlin , Dan Hooper , Gordan Krnjaic , Samuel D. McDermott

The recent observation of an excess in the electronic recoil data by the XENON1T detector has drawn many attentions as a potential hint for an extension of the Standard Model (SM). Absorption of a vector boson with the mass of…

High Energy Physics - Phenomenology · Physics 2020-10-08 Gongjun Choi , Tsutomu T. Yanagida , Norimi Yokozaki

Constraints on selected mediator-based dark matter models and a scalar dark energy model using up to $37~\mathrm{fb}^{-1}$ $\sqrt s = 13$ TeV $pp$ collision data collected by the ATLAS detector at the LHC during 2015-2016 are summarised in…

High Energy Physics - Experiment · Physics 2019-06-25 ATLAS Collaboration

We investigate the sensitivity of present and future direct detection experiments to generalized neutrino interactions (GNI) through elastic neutrino electron scattering. Using data from LUX-ZEPLIN, PandaX-4T, and XENONnT, we derive…

High Energy Physics - Phenomenology · Physics 2026-05-27 Jesús Miguel Celestino-Ramírez , F. J. Escrihuela , L. J. Flores , O. G. Miranda , R. Sánchez-Vélez

Very recently, we proposed an explanation of the discrepancy between the measured anomalous magnetic moment of the muon and the Standard Model (SM) prediction in which the dominant contribution to $(g-2)_\mu$ originates in Kaluza-Klein (KK)…

High Energy Physics - Phenomenology · Physics 2022-03-24 Luis A. Anchordoqui , Ignatios Antoniadis , Xing Huang , Dieter Lüst , François Rondeau , Tomasz R. Taylor

The XENON100 collaboration has recently released new dark matter limits, placing particular emphasis on their impact on searches known to be sensitive to light-mass (below 10 GeV/c^2) Weakly Interacting Massive Particles (WIMPs), such as…

Cosmology and Nongalactic Astrophysics · Physics 2010-05-14 J. I. Collar , D. N. McKinsey

Coherent elastic neutrino-nucleus (CE$\nu$NS) and elastic neutrino-electron scattering (E$\nu$ES) data are exploited to constrain ``chiral'' $U(1)_{X}$ gauged models with light vector mediator mass. These models fall under a distinct class…

High Energy Physics - Phenomenology · Physics 2025-04-17 Anirban Majumdar , Dimitrios K. Papoulias , Hemant Prajapati , Rahul Srivastava

We consider the physical implications of very light axiodilatons motivated by a novel mechanism to substantially reduce the vacuum energy proposed in arXiv:2110.10352. We address the two main problems concerning the light axiodilaton that…

High Energy Physics - Phenomenology · Physics 2023-08-16 Philippe Brax , Cliff Burgess , Fernando Quevedo

We propose a simplified model of dark matter with a scalar mediator to accommodate the di-photon excess recently observed by the ATLAS and CMS collaborations. Decays of the resonance into dark matter can easily account for a relatively…

High Energy Physics - Phenomenology · Physics 2016-04-20 Mihailo Backovic , Alberto Mariotti , Diego Redigolo

We update the constraints on two-Higgs-doublet models (2HDMs) focusing on the parameter space relevant to explain the present muon $g$$-$$2$ anomaly, $\Delta a_{\mu}$, in four different types of models, type I, II, "lepton specific" (or X)…

High Energy Physics - Phenomenology · Physics 2015-06-22 Alessandro Broggio , Eung Jin Chun , Massimo Passera , Ketan M. Patel , Sudhir K. Vempati

Detection of axion dark matter heavier than a meV is hindered by its small wavelength, which limits the useful volume of traditional experiments. This problem can be avoided by directly detecting in-medium excitations, whose $\sim…

High Energy Physics - Phenomenology · Physics 2025-04-18 Asher Berlin , Tanner Trickle