A5090223801- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Cosmology and Gravitation Theories
- Atomic and Subatomic Physics Research
- Radioactive Decay and Measurement Techniques
- Quantum Chromodynamics and Particle Interactions
- Cold Atom Physics and Bose-Einstein Condensates
- Age of Information Optimization
- Particle Detector Development and Performance
- Fractal and DNA sequence analysis
- Quantum and electron transport phenomena
- Advanced Thermodynamics and Statistical Mechanics
- Superconducting and THz Device Technology
- Relativity and Gravitational Theory
- Radiation Therapy and Dosimetry
- Galaxies: Formation, Evolution, Phenomena
- Opportunistic and Delay-Tolerant Networks
- Nuclear physics research studies
- High-Energy Particle Collisions Research
- Computational Physics and Python Applications
Istituto Nazionale di Fisica Nucleare
2021
University of Nottingham
2018
University of Padua
2016-2017
Istituto Nazionale di Fisica Nucleare, Sezione di Padova
2016-2017
University of California, Los Angeles
2015
University of Southern Denmark
2011-2013
Swedish Chemicals Agency
2011
University of Pisa
2009
We discuss a framework (based on non-relativistic operators) and self-contained set of numerical tools to derive the bounds from some current direct detection experiments virtually any arbitrary model Dark Matter elastically scattering nuclei.
We study a Dirac dark matter particle interacting with ordinary via the exchange of light pseudoscalar, and analyze its impact on both direct indirect detection experiments. show that this candidate can accommodate long-standing DAMA modulated signal yet be compatible all exclusion limits at 99S% C.L. This result holds for natural choices pseudoscalar-quark couplings (e.g., flavor universal), which give rise to significant enhancement matter-proton coupling respect neutrons. also find...
We present comparisons of direct detection data for ``light WIMPs'' with an anapole moment interaction (ADM) and a magnetic dipole (MDM), both assuming the Standard Halo Model (SHM) dark halo our galaxy in halo-independent manner. In SHM analysis we find that combination 90% CL LUX CDMSlite limits or new SuperCDMS limit by itself exclude parameter space regions allowed DAMA, CoGeNT CDMS-II-Si ADM MDM. bound excludes same potential signal as previous XENON100 bound. Much remaining is now...
We extend the halo-independent method to compare direct dark matter detection data, so far used only for spin-independent WIMP-nucleon interactions, any type of interaction. As an example we apply magnetic moment interactions.
We study a fermionic Dark Matter particle carrying magnetic dipole moment and analyze its impact on direct detection experiments. In particular we show that it can accommodate the DAMA, CoGeNT CRESST experimental results. Assuming conservative bounds, this candidate is shown not to be ruled out by CDMS, XENON PICASSO offer an analytic understanding of how long-range interaction modifies allowed regions, in cross section versus mass parameter space, with respect typically assumed contact...
Minimal Dark Matter (MDM) is a theoretical framework highly appreciated for its minimality and yet predictivity. Of the two only viable candidates singled out in original analysis, scalar eptaplet has been found to decay too quickly be around today, while fermionic quintuplet now being probed by indirect (DM) searches. It therefore timely critically review MDM paradigm, possibly pointing generalizations of this framework. We propose explore distinct directions. One abandon assumption DM...
We provide a simple mechanism for reconciling the direct dark matter experimental results. consider light asymmetric composite which scatters off nuclei via Higgs and photon exchange. demonstrate that interference between these two channels naturally accommodates discover this happens compositeness scale of order electroweak. also model realization based on strong dynamics at electroweak scale.
We present a halo-independent analysis of direct detection data on ``light WIMPs," i.e. weakly interacting massive particles with mass close to or below 10 GeV/c2. include new results from silicon CDMS detectors (bounds and excess events), the latest CoGeNT acceptances, recent measurements low sodium quenching factors in NaI crystals. focus light WIMPs spin-independent isospin-conserving isospin-violating interactions nucleons. For these dark matter candidates we find that factor would make...
We reexamine the current direct dark matter data including recent CDMSlite and LUX data, assuming that consists of light WIMPs, with mass close to 10 GeV/c2 spin-independent isospin-conserving or isospin-violating interactions. compare a standard model for halo our galaxy also in halo-independent manner. In standard-halo analysis, we find couplings, together exclude DAMA, CoGeNT, CDMS-II-Si, CRESST-II possible WIMP signal regions. For couplings instead, substantial portion CDMS-II-Si region...
Self-interacting dark matter (SIDM) is a simple and well-motivated scenario that could explain long-standing puzzles in structure formation on small scales. If the required self-interaction arises through light mediator (with mass ∼ 10 MeV) sector, this new particle must be unstable to avoid overclosing universe. The decay of happen due weak coupling hidden visible sectors, providing signatures for direct detection experiments. SIDM nuclear recoil spectrum more peaked towards low energies...
We determine the most general nonrelativistic theory of dark matter (DM)-nucleon scattering complying with sole requirement Lorentz invariance, for spin-0 and spin-$1/2$ DM. To do so, we first classify a comprehensive list amplitude terms encompassing Lorentz-covariant 2-to-2 DM-nucleon amplitude. then match each term to Galilean-invariant operator at leading order in expansion, both elastic inelastic (endothermic exothermic) scattering. Our complete Lorentz-to-Galileo mapping can be used...
We reexamine the interpretation of annual modulation signal observed by DAMA experiment as due to WIMPs with a spin-dependent coupling mostly protons. consider both axial-vector and pseudo-scalar couplings, elastic well endothermic exothermic inelastic scattering. conclude that is in strong tension null results other direct detection experiments, particularly PICASSO KIMS.
We briefly review the halo-independent formalism, that allows to compare data from different direct dark matter de- tection experiments without making assumptions on properties of halo. apply this method spin-independent WIMP-nuclei interactions, for both isospin-conserving and isospin-violating couplings, updating existing analyses with addition SuperCDMS bound. point out can be applied any type WIMP interaction.
Due to Earth's revolution around the Sun, expected scattering rate in direct dark matter searches is annually modulated. This modulation differ between experiments when given as a function of recoil energy ${E}_{\mathrm{R}}$, e.g. due gravitational focusing effect Sun. A better variable compare results among employing different targets minimum speed ${v}_{\mathrm{min}}$ particle must have impart ${E}_{\mathrm{R}}$ target nucleus. It widely believed that expressed common all experiments,...
We organize the effective (self-)interaction terms for complex scalar dark matter candidates which are either an isosinglet, isodoublet or isotriplet with respect to weak interactions. The classification has been performed ordering operators in inverse powers of (DM) cutoff scale. assume Lorentz invariance, color and charge neutrality. also introduce potentially interesting DM induced flavor-changing operators. Our general framework allows model independent investigations properties.
Earth's rotation about the Sun produces an annual modulation in expected scattering rate at direct dark matter detection experiments. The as a function of recoil energy ER imparted by particle to target nucleus is vary depending on detector material. However, for most interactions change variables from vmin, minimum speed must have impart fixed nucleus, independent element. We recently showed that if matter-nucleus cross section contains non-factorizable and velocity dependence, vmin can be...
We review the halo-independent formalism, that allows to compare data from different direct dark matter detection experiments without making assumptions on properties of halo. apply this method spin-independent WIMP-nuclei interactions, for both isospin-conserving and isospin-violating couplings, WIMPs interacting through an anomalous magnetic moment.
We study how gravitational focusing (GF) of dark matter by the Sun affects annual and biannual modulation expected signal in non-directional direct searches, presence substructure local halo. consider Sagittarius stream a possible disk, show that GF suppresses some, but not all, distinguishing features would characterize halo were neglected.
We study different patterns of interference in WIMP-nuclei elastic scattering that can accommodate the DAMA and CoGeNT experiments via an isospin violating ratio f n /f p = -0.71. between following pairs mediators: Z Z′, Z′ Higgs, two Higgs fields. show under what conditions works. also demonstrate case interference, explanation DAMA/CoGeNT is consistent with electroweak baryogenesis scenarios based on doublet models proposed past.