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Type-X two Higgs doublet model is known to explain the muon $g-2$ anomaly with a relatively light charged Higgs boson at large $\tan\beta$. The light charged Higgs boson has been searched in the main $\tau \nu$ mode at the colliders.…

High Energy Physics - Phenomenology · Physics 2019-09-04 Priyotosh Bandyopadhyay , Eung Jin Chun , Rusa Mandal

We investigate an economical explanation for the $(g-2)_\mu$ anomaly with a neutral vector boson from a spontaneously broken $\mathrm{U}(1)_X$ gauge symmetry. The Standard Model fermion content is minimally extended by 3 right-handed…

High Energy Physics - Phenomenology · Physics 2022-08-10 Admir Greljo , Peter Stangl , Anders Eller Thomsen , Jure Zupan

We study the deflected anomaly-mediated supersymmetry breaking (AMSB) scenario in the light of the recent result of the muon g-2 from Brookhaven E821 experiment. The E821 result suggests the deviation from the SM prediction, though there…

High Energy Physics - Phenomenology · Physics 2014-11-17 Nobutaka Abe , Motoi Endo

We observed electron-positron pairs from the electro-magnetically forbidden M0 transition depopulating the 21.01 MeV 0$^-$ state in $^4$He. A peak was observed in their $e^+e^-$ angular correlations at 115$^\circ$ with 7.2$\sigma$…

The MiniBooNE experiment has recently reported an anomalous 4.5$\sigma$ excess of electron-like events consistent with $\nu_e$ appearance from a $\nu_\mu$ beam at short-baseline. Given the lack of corresponding $\nu_\mu$ disappearance…

High Energy Physics - Phenomenology · Physics 2019-08-08 Johnathon R. Jordan , Yonatan Kahn , Gordan Krnjaic , Matthew Moschella , Joshua Spitz

Differential cross sections and photon-beam asymmetries for the gamma p -> pi- Delta++(1232) reaction have been measured for 0.7<cos(theta)<1 and Egamma=1.5-2.95 GeV at SPring-8/LEPS. The first-ever high statistics cross section data are…

I provide a (personal) review of the current hints for physics beyond the Standard Model, called ``anomalies'', obtained both at the intensity frontier (flavour and electroweak precision observables) and in direct LHC searches. This…

High Energy Physics - Phenomenology · Physics 2023-04-10 Andreas Crivellin

Spin-dependent fifth-forces are associated with particles beyond the standard model. In particular, light pseudo-scalar bosons mediate long-range forces, allowing mass to interact with spins. The search of these interactions can be…

High Energy Physics - Experiment · Physics 2022-03-07 N. Crescini , G. Carugno , P. Falferi , A. Ortolan , G. Ruoso , C. C. Speake

Nowadays the field of searching for a new physics became a very interesting subject in a light meson decays due to a recent results from KTeV collaboration which found the 3.3\sigma\ disagreement between Standard Model theory and their…

Nuclear Experiment · Physics 2013-01-28 Marcin Berlowski

Recently, the monopole transition form factor of the electron-scattering excitation of the 0^+_2 state (E_x=20.21 MeV) of the 4He nucleus was observed over a broad momentum transfer range (0.5 < q^2 < 5.0 fm^-2) with dramatically improved…

Nuclear Theory · Physics 2023-08-02 Masayasu Kamimura

The $\Lambda$CDM model has successfully explained a wide range of cosmological observations, but is increasingly challenged by the emergence of cosmological tensions, particularly the Hubble Tension $H_0$ and the $S_8$ tension. The Hubble…

Cosmology and Nongalactic Astrophysics · Physics 2025-02-25 Miguel A. Sabogal , Emanuelly Silva , Rafael C. Nunes , Suresh Kumar , Eleonora Di Valentino

We present a machine learning-based anomaly detection strategy designed to identify anomalous physics in events containing resonant Standard Model physics and demonstrate this method on the final state of a Higgs boson decaying to two…

High Energy Physics - Experiment · Physics 2025-08-20 Chi Lung Cheng , Sarah Demers , Sascha Diefenbacher , Runze Li , Benjamin Nachman , Dennis Noll

This paper, together with a preceding paper, questions the so-called 'LSND anomaly': a 3.8 sigma excess of antielectronneutrino interactions over standard backgrounds, observed by the LSND Collaboration in a beam dump experiment with 800…

We argue that the anomalous magnetic moment of the electron (a_e) can be used to probe new physics. We show that the present bound on new-physics contributions to a_e is 8*10^-13, but the sensitivity can be improved by about an order of…

High Energy Physics - Phenomenology · Physics 2015-06-11 G. F. Giudice , P. Paradisi , M. Passera

We search for signatures of the extra neutral gauge boson $ Z^\prime$, predicted in some extensions of the Standard Model, from the analysis of some distributions for $p + p \longrightarrow \mu^+ + \mu^- + X$, where the only exotic particle…

High Energy Physics - Phenomenology · Physics 2014-11-20 E. Ramirez Barreto , Y. A. Coutinho , J. Sá Borges

The recent ATOMKI experiments provided evidence pointing towards the existence of an X17 boson in the anomalous nuclear transitions of Beryllium-8, Helium-4, and Carbon-12. In this work, we consider X17 boson contributions to the previously…

High Energy Physics - Phenomenology · Physics 2026-04-17 Fei-Fan Lee , Lam Thi Thuc Uyen , Guey-Lin Lin

We present an ab-initio study of the isoscalar monopole excitations of 4He using different realistic nuclear interactions, including modern effective field theory potentials. In particular we concentrate on the transition form factor…

Nuclear Theory · Physics 2015-06-11 S. Bacca , N. Barnea , W. Leidemann , G. Orlandini

The neutral $B$-anomalies are analysed in terms of the tree-level exchange of a (pseudo)scalar gauge singlet $a$. Solutions to both $R_{K^{(*)}}$ central bin anomalies are found within $1\sigma$ for ${m_{a}^2 \in…

High Energy Physics - Phenomenology · Physics 2022-11-11 Jesus Bonilla , Arturo de Giorgi , Maria Ramos

We study how the eightfold-degeneracy in the ($\theta_{13},\delta$) plane observed in $\gamma \sim 100$ $\beta$-beams can be reduced by periodically changing the ions in the storage ring. This ``ions cocktail'' allows to change the neutrino…

High Energy Physics - Phenomenology · Physics 2008-11-26 A. Donini , E. Fernandez-Martinez

This talk discusses possible new physics interpretations of recent experimental results on the B-->K*mu+mu- decay that show a discrepancy with the Standard Model predictions. A model independent analysis that takes into account all the…

High Energy Physics - Phenomenology · Physics 2014-05-21 Wolfgang Altmannshofer