Article
Physics, Multidisciplinary
Antonio Ambrosone, Marco Chianese, Damiano F. G. Fiorillo, Antonio Marinelli, Gennaro Miele
Summary: Starburst galaxies are potential sources of high-energy gamma rays, and their cosmic-ray spectrum distortion can be indirectly observed. Current data provide tight bounds on the cross section between protons and dark matter, while future measurements are expected to significantly improve these limits.
PHYSICAL REVIEW LETTERS
(2023)
Article
Astronomy & Astrophysics
Tirtha Sankar Ray, Sambo Sarkar, Abinash Kumar Shaw
Summary: In this study, we aim to constrain the self-interaction of dark matter by analyzing the distribution of core radius in isolated haloes. By conducting simulations and comparing them with observational data, we provide an upper limit on the self-interaction cross-section and find a significant dependence on the assumed galactic density distribution models.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Physics, Multidisciplinary
Silvia Manconi, Alessandro Cuoco, Julien Lesgourgues
Summary: Scientists have used synchrotron polarization for the first time to constrain the annihilation of dark matter. They found that synchrotron polarization is generally more constraining than synchrotron intensity, independent of uncertainties in electron and positron propagation models or the Galactic magnetic field. The bounds obtained in this study compete with cosmic microwave background limits, particularly in the case of leptophilic dark matter.
PHYSICAL REVIEW LETTERS
(2022)
Article
Astronomy & Astrophysics
Hongwan Liu, Wenzer Qin, Gregory W. Ridgway, Tracy R. Slatyer
Summary: We have derived new constraints on models of decaying and annihilating dark matter by ensuring that the energy injected into the intergalactic medium does not overheat it at late times. These constraints, obtained using the DarkHistory code package, are robust to uncertainties in reionization and competitive with other limits on dark matter.
Article
Astronomy & Astrophysics
Brandon M. Roach, Steven Rossland, Kenny C. Y. Ng, Kerstin Perez, John F. Beacom, Brian W. Grefenstette, Shunsaku Horiuchi, Roman Krivonos, Daniel R. Wik
Summary: We present two complementary NuSTAR x-ray searches for keV-scale dark matter decaying to monoenergetic photons in the Milky Way halo. Finding no evidence of anomalous x-ray lines using either method, we set limits on the active-sterile mixing angle and sterile-neutrino masses. The first key result is that we strongly disfavor a 7-keV sterile neutrino decaying into a 3.5-keV photon, and the second is that we derive leading limits on sterile neutrinos with masses 15-18 keV and 25-40 keV, reaching or extending below the big bang nucleosynthesis limit. In combination with previous results, the parameter space for the neutrino minimal standard model is now nearly closed.
Article
Multidisciplinary Sciences
Itay M. Bloch, Roy Shaham, Yonit Hochberg, Eric Kuflik, Tomer Volansky, Or Katz
Summary: Ultralight axion-like particles are well-motivated relics that might compose the cosmological dark matter. Researchers report on the terrestrial bounds for the coupling of axion-like particles to neutrons and protons, providing reliable limits for the coupling of protons and neutrons with axion-like dark matter.
NATURE COMMUNICATIONS
(2023)
Article
Physics, Multidisciplinary
D. S. M. Alves, S. R. Elliott, R. Massarczyk, S. J. Meijer, H. Ramani
Summary: We report the first measurement of radiation from a 178mHf sample for the purpose of searching for dark matter. The gamma flux from the sample was measured using a Ge detector and the obtained limits on this gamma flux were used to constrain the parameter space of inelastic dark matter. Furthermore, we discuss the potential of future studies with 178mHf.
PHYSICAL REVIEW LETTERS
(2023)
Article
Astronomy & Astrophysics
Mattia Di Mauro, Martin Wolfgang Winkler
Summary: Excess gamma rays towards the Galactic Center detected by the Fermi Large Area Telescope may be related to dark matter particles. Research on dark matter candidates and various data sets suggest that only one candidate fits the Galactic Center excess spectrum and meets all constraints.
Article
Astronomy & Astrophysics
Yonit Hochberg, Benjamin Lehmann, Ilya Charaev, Jeff Chiles, Marco Colangelo, Sae Woo Nam, Karl K. Berggren
Summary: Superconducting nanowires, originally developed for quantum sensing, can be utilized as a tool for searching for dark matter interactions with electrons. A recent measurement with a tungsten silicide superconducting nanowire device has provided new constraints on sub-MeV dark matter-electron interactions, establishing the strongest constraints to date on such interactions.
Article
Physics, Multidisciplinary
Lorenzo Aiello, Jonathan W. Richardson, Sander M. Vermeulen, Hartmut Grote, Craig Hogan, Ohkyung Kwon, Chris Stoughton
Summary: In this study, we investigate the potential existence of low-mass scalar field dark matter candidates by analyzing the oscillations induced in the size and index of refraction of solids. By using cross-correlated data from the Fermilab Holometer instrument, we set new upper limits for the coupling parameters of scalar field dark matter.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
James M. Cline, Shan Gao, Fangyi Guo, Zhongan Lin, Shiyan Liu, Matteo Puel, Phillip Todd, Tianzhuo Xiao
Summary: Neutrino emission coinciding with gamma rays has been observed from the blazar TXS 0506 + 056 by the IceCube telescope. These neutrinos had to traverse through a dense spike of dark matter surrounding the central black hole. The observation of such neutrinos implies new upper limits on the neutrino-dark matter scattering cross section as a function of dark matter mass. The constraint is stronger than existing ones for a range of dark matter masses, assuming a linearly rising cross section with energy. Competitive bounds are also possible for constant cross sections, depending on the details of the dark matter spike.
PHYSICAL REVIEW LETTERS
(2023)
Article
Physics, Multidisciplinary
Malte Buschmann, Benjamin R. Safdi, Katelin Schutz
Summary: This study introduces a new method for measuring the Milky Way potential using the angular accelerations of stars in aggregate. The findings suggest that it is possible to measure the potential of the MW disk and the local dark matter density at different significance levels. In the future, combining different astronomical surveys may lead to precise measurements of the local dark matter density and the shape of its density profile.
PHYSICAL REVIEW LETTERS
(2021)
Article
Astronomy & Astrophysics
Gerardo Alvarez, Hai-Bo Yu
Summary: The study suggests that self-interacting dark matter (SIDM) may lead to shallower density spikes, resulting in relaxed constraints on indirect detection of dark matter annihilation. By examining satellite galaxies like Draco in the Milky Way, upper limits on the annihilation cross section and black hole mass for both SIDM and CUM halos are derived. Constraints on dark matter annihilation are significantly weakened in SIDM, especially in the presence of supermassive black holes in galaxies like the Milky Way and M87.
Article
Astronomy & Astrophysics
S. Fischer, D. Malyshev, L. Ducci, A. Santangelo
Summary: Based on the data collected by the INTEGRAL's SPI spectrometer over nearly 20 years, constraints on decaying dark matter particles have been presented. The analysis reveals the detection of 32 line-like features, with 29 of them coinciding with known instrumental and astrophysical lines. Additionally, limits on the mixing angle for sterile neutrino dark matter have been reported in relation to the neutrino's mass.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Review
Physics, Multidisciplinary
Manuel A. Buen-Abad, Rouven Essig, David McKeen, Yi-Ming Zhong
Summary: This article investigates the effects of dark matter interactions with electrons or protons on the cosmic microwave background and the matter power spectrum, and utilizes diverse data to study these interactions. The study finds that these interactions result in momentum and heat exchange between ordinary and dark matter, and provides constraints on dark matter models. These constraints are crucial for understanding the interactions between dark matter and ordinary matter.
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
(2022)
Article
Physics, Particles & Fields
Chris Kelso, Christopher Savage, Pearl Sandick, Katherine Freese, Paolo Gondolo
EUROPEAN PHYSICAL JOURNAL C
(2018)
Article
Physics, Particles & Fields
Paul Bergeron, Pearl Sandick, Kuver Sinha
JOURNAL OF HIGH ENERGY PHYSICS
(2018)
Article
Astronomy & Astrophysics
Tathagata Ghosh, Jason Kumar, Danny Marfatia, Pearl Sandick
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2018)
Article
Physics, Multidisciplinary
Bartosz Fornal, Pearl Sandick, Jing Shu, Meng Su, Yue Zhao
PHYSICAL REVIEW LETTERS
(2020)
Article
Computer Science, Interdisciplinary Applications
Kimberly K. Boddy, Stephen Hill, Jason Kumar, Pearl Sandick, Barmak Shams Es Haghi
Summary: MADHAT is a numerical tool that implements a model-independent analysis of gamma-ray emission from dwarf satellite galaxies and candidates, providing statistical upper bounds on observed photons and calculating constraints on dark matter properties based on user assumptions. The tool includes 58 dwarf targets, with future developments planned, and is available on the MADHAT GitHub repository for maintenance and access.
COMPUTER PHYSICS COMMUNICATIONS
(2021)
Article
Education & Educational Research
Ramon Barthelemy, MacKenzie Lenz, Alexis Knaub, Jordan Gerton, Pearl Sandick
Summary: In 2017, the University of Utah went through a tragic event that led to significant changes in its department. Admissions to the graduate program were halted while new policies were being developed and implemented. This article examines the change process from the perspective of those involved, highlighting the complexities and the importance of gathering input from various stakeholders. The findings underscore the challenges faced in implementing large-scale programmatic changes and the enduring cultural obstacles even after the introduction of new policies. The metaphor of a bonfire is suggested to symbolize this change, as a tragedy sparked the already existing structures of change and sustained efforts are necessary to maintain and expand the reforms. The department is also looking to extend their reform efforts to undergraduate initiatives and promote evidence-based teaching practices.
PHYSICAL REVIEW PHYSICS EDUCATION RESEARCH
(2023)
Article
Astronomy & Astrophysics
Yifan Chen, Bartosz Fornal, Pearl Sandick, Jing Shu, Xiao Xue, Yue Zhao, Junchao Zong
Summary: This study investigates the daily modulation feature of a potential future signal caused by boosted dark particles of astrophysical origin in direct detection experiments. Specifically, simulations of the interactions between dark particles and electrons in atoms forming the Earth's path to the detector were conducted, and in-depth predictions for the expected daily changes in the signal were provided for various direct detection experiments, including XENONnT, PandaX, and LUX-ZEPLIN.
Article
Astronomy & Astrophysics
Pearl Sandick, Barmak Shams Es Haghi, Kuver Sinha
Summary: Investigating the Hawking evaporation of primordial black holes as a mechanism for asymmetric reheating of two sectors reveals rich phenomenology of the dark sector. Different thermal histories with nonrelativistic and relativistic dark matter in chemical equilibrium are explored, constrained by the observed relic abundance and the Bullet Cluster in the current Universe. The case where PBHs dominate the energy density and reheat both sectors is also detailed in the study.
Article
Astronomy & Astrophysics
Alexandre Arbey, Jeremy Auffinger, Pearl Sandick, Barmak Shams Es Haghi, Kuver Sinha
Summary: This article presents precision calculations of dark radiation from spinning primordial black holes (PBHs) in the early Universe, including extended spin distributions, PBH reheating temperature, and relativistic degrees of freedom. Comparisons with existing literature show constraints on PBHs from dark radiation, with projections from CMB Stage 4 experiments. Results indicate that CMB Stage 4 experiments will probe all PBH masses up to 10^9 grams, as well as PBHs with monochromatic spins a* > 0.81.
Article
Astronomy & Astrophysics
Paolo Gondolo, Pearl Sandick, Barmak Shams Es Haghi
Article
Astronomy & Astrophysics
Sebastian Baum, Pearl Sandick, Patrick Stengel
Article
Astronomy & Astrophysics
Pearl Sandick, Takahiro Yamamoto, Kuver Sinha
Article
Astronomy & Astrophysics
Kimberly K. Boddy, Jason Kumar, Danny Marfatia, Pearl Sandick
Article
Astronomy & Astrophysics
Chris Kelso, Jason Kumar, Danny Marfatia, Pearl Sandick
Article
Astronomy & Astrophysics
Andrew Davidson, Chris Kelso, Jason Kumar, Pearl Sandick, Patrick Stengel