Searcharxiv⌕ Search
Home/Archive/arXiv

arXiv · 1801.02905

Explaining DAMA with proton-philic spin-dependent inelastic Dark Matter (pSIDM): a frequentist analysis

Seong-Hyeong Kang·Stefano Scopel·Jong-Hyun Yoon
View original source ↗Read source document ↗Export metadata ↓

Abstract

Proton-philic spin-dependent inelastic Dark Matter is a Weakly Inelastic Massive Particle scenario that can explain the DAMA yearly modulation effect in compliance with the constraints from other direct detection Dark Matter searches. We obtain updated ranges for its parameters both in a halo-independent approach and adopting a truncated Maxwellian for the WIMP velocity distribution constructing approximate frequentist confidence intervals from an effective chi-square including, among others, the latest experimental constraints from XENON1T, PANDAX-II, SuperCDMS and CDMSlite. In the halo-independent analysis we have implemented the dependence on the WIMP velocity distribution through a step-wise parameterization of the halo function. For the calculation of the profile likelihood we used a Markov Chain Montecarlo generator that required a large number of evaluations of the expected rates. To reduce computational time we introduced expected rates expressions suitable for a fast evaluation through tabulation and interpolation. Our frequentist analysis confirms the present viability of the pSIDM scenario as a possible explanation of the DAMA effect. In terms of the WIMP mass $m_{\chi}$ and of the mass splitting $\delta$ we find the 1-sigma ranges $\mbox{12.5 GeV} \le m_{\chi}\le \mbox{15.7 GeV}$, $\mbox{22.1 keV} \le \delta \le \mbox{26.1 keV}$ for the halo--independent analysis and $\mbox{11.4 GeV} \le m_{\chi}\le \mbox{13.6 GeV}$, $\mbox{24.4 keV} \le \delta \le \mbox{27.0 keV}$ for the Maxwellian case. We find that a full year of data taking of XENON1T should allow to start probing the pSIDM scenario.

Explore related subjects

hep-ph

Keep this discovery

BibTeXRIS

Seong-Hyeong Kang, Stefano Scopel, Jong-Hyun Yoon. 2018-01-09. Explaining DAMA with proton-philic spin-dependent inelastic Dark Matter (pSIDM): a frequentist analysis. https://arxiv.org/abs/1801.02905

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related papers

arXiv2026

Axionic Wormholes in Metric-Affine Gravity

The axion is a promising candidate for solving the strong CP problem. To solve this problem, the global U(1) symmetry must be preserved to a high degree of accuracy. However, it is well known that global symmetries are explicitly violated by quantum gravity effects, giving rise to what is referred to as the axion quality problem. In this paper, we investigate axionic wormholes as a source of explicit U(1) violation in Metric-Affine Gravity. This framework allows for spacetime torsion and non-metricity, which accommodate additional curvature-like and topological terms, such as the Holst and Nieh--Yan terms, that are absent from the metric and Palatini formalisms. We show that non-minimal couplings to these terms modify the wormhole dynamics and enhance the Euclidean wormhole action, thereby alleviating the axion quality problem. We also find that the viable parameter space is enlarged when two of these couplings are simultaneously present. We further identify representative parameter regions where the alleviation of the axion quality problem is compatible with inflationary constraints.

hep-ph↗
arXiv2026

Qubit-Qutrit Quantum Tomography of hadronic $\Lambda\phi$ and $\Lambda K^{\ast 0}$ systems

Quantum-information observables have emerged in recent years as new tools in nuclear and particle physics, from entanglement in top-quark pairs to spin correlations in $\Lambda\bar{\Lambda}$ production. Extending these studies to unequal-spin hadronic final states poses a fundamental challenge: the $6\times6$ density matrix of a qubit-qutrit system contains 35 independent spin parameters, but the decays of $\Lambda V$ pairs, with $V=\phi$ or $K^{*0}$, provide access to only 23 due to the hidden vector polarization from the strong decay. In this Letter, we formulate a qubit-qutrit quantum tomography (QQQT) technique for these spin-$\tfrac{1}{2}\otimes1$ systems and establish exact criteria for entanglement certification from the \textit{incomplete} density matrix. Compared with the $\Lambda\bar{\Lambda}$ system, QQQT of $\Lambda\phi$ and $\Lambda K^{*0}$ provides a new probe of nonperturbative QCD hadronization, enabling a direct comparison of the spin evolution of entangled quark pairs produced from the vacuum as they hadronize into a baryon or a vector meson.

hep-ph↗
arXiv2026

Twist decomposition of exclusive heavy meson production cross sections

We study the twist decomposition of the total cross sections for exclusive heavy vector meson electroproduction and photoproduction in the $\gamma^\ast p$ processes, within the leading logarithmic $1/x$ BFKL formalism. The Mellin transforms of the impact factors of the vector meson are calculated. We show that the higher twist contributions are strongly suppressed in the low-$x$ kinematical regime. Possible enhancement of the higher twists effects for nuclei targets is discussed.

hep-ph↗