Search Results - "Beacom, John F"

New Freezeout Mechanism for Strongly Interacting Dark Matter by Smirnov, Juri, Beacom, John F.

“…We present a new mechanism for thermally produced dark matter, based on a semi-annihilation-like process, χ + χ + SM → χ + SM , with intriguing consequences…”
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Precise relic WIMP abundance and its impact on searches for dark matter annihilation by Steigman, Gary, Dasgupta, Basudeb, Beacom, John F.

“…If dark matter (DM) is a weakly interacting massive particle (WIMP) that is a thermal relic of the early Universe, then its total self-annihilation cross…”
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Theoretically Palatable Flavor Combinations of Astrophysical Neutrinos by Bustamante, Mauricio, Beacom, John F, Winter, Walter

“…The flavor composition of high-energy astrophysical neutrinos can reveal the physics governing their production, propagation, and interaction. The IceCube…”
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DUNE as the Next-Generation Solar Neutrino Experiment by Capozzi, Francesco, Li, Shirley Weishi, Zhu, Guanying, Beacom, John F.

“…We show that the Deep Underground Neutrino Experiment (DUNE), with significant but feasible new efforts, has the potential to deliver world-leading results in…”
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High-energy Emission from Interacting Supernovae: New Constraints on Cosmic-Ray Acceleration in Dense Circumstellar Environments by Murase, Kohta, Franckowiak, Anna, Maeda, Keiichi, Margutti, Raffaella, Beacom, John F.

“…Supernovae (SNe) with strong interactions with circumstellar material (CSM) are promising candidate sources of high-energy neutrinos and gamma-rays and have…”
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Echo Technique to Distinguish Flavors of Astrophysical Neutrinos by Li, Shirley Weishi, Bustamante, Mauricio, Beacom, John F

“…The flavor composition of high-energy astrophysical neutrinos is a rich observable. However, present analyses cannot effectively distinguish particle showers…”
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On the Normalization of the Cosmic Star Formation History by Hopkins, Andrew M, Beacom, John F

“…Strong constraints on the cosmic star formation history (SFH) have recently been established using ultraviolet and far-infrared measurements, refining the…”
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Role of Line-of-sight Cosmic-ray Interactions in Forming the Spectra of Distant Blazars in TeV Gamma Rays and High-energy Neutrinos by Essey, Warren, Kalashev, Oleg, Kusenko, Alexander, Beacom, John F

“…Active galactic nuclei (AGNs) can produce both gamma rays and cosmic rays. The observed high-energy gamma-ray signals from distant blazars may be dominated by…”
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Stringent constraint on galactic positron production by Beacom, John F, Yüksel, Hasan

“…The intense 0.511 MeV gamma-ray line emission from the Galactic Center observed by INTEGRAL requires a large annihilation rate of nonrelativistic positrons. If…”
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Secondary photons and neutrinos from cosmic rays produced by distant blazars by Essey, Warren, Kalashev, Oleg E, Kusenko, Alexander, Beacom, John F

“…Secondary photons and neutrinos produced in the interactions of cosmic ray protons emitted by distant active galactic nuclei (AGN) with the photon background…”
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Measurement of the Core-collapse Progenitor Mass Distribution of the Small Magellanic Cloud by Auchettl, Katie, Lopez, Laura A., Badenes, Carles, Ramirez-Ruiz, Enrico, Beacom, John F., Holland-Ashford, Tyler

“…The physics of core-collapse (CC) supernovae (SNe) and how the explosions depend on progenitor properties are central questions in astronomy. For only a…”
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Evidence for a New Component of High-Energy Solar Gamma-Ray Production by Linden, Tim, Zhou, Bei, Beacom, John F, Peter, Annika H G, Ng, Kenny C Y, Tang, Qing-Wen

“…The observed multi-GeV γ-ray emission from the solar disk-sourced by hadronic cosmic rays interacting with gas and affected by complex magnetic fields-is not…”
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The Star Formation Rate in the Reionization Era as Indicated by Gamma-Ray Bursts by Kistler, Matthew D, Yüksel, Hasan, Beacom, John F, Hopkins, Andrew M, Wyithe, J. Stuart B

“…High-redshift gamma-ray bursts (GRBs) offer an extraordinary opportunity to study aspects of the early universe, including the cosmic star formation rate…”
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Small-scale Magnetic Fields Are Critical to Shaping Solar Gamma-Ray Emission by Li, Jung-Tsung, Beacom, John F., Griffith, Spencer, Peter, Annika H. G.

“…Abstract The Sun is a bright gamma-ray source due to hadronic cosmic-ray interactions with solar gas. While it is known that incoming cosmic rays must…”
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THE STAR-FORMING GALAXY CONTRIBUTION TO THE COSMIC MeV AND GeV GAMMA-RAY BACKGROUND by Lacki, Brian C, Horiuchi, Shunsaku, Beacom, John F

“…Star-forming galaxies could be major contributors to the cosmic GeV [gamma]-ray background, and they are expected to be MeV-dim because of the "pion bump"…”
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Upper bound on the dark matter total annihilation cross section by Beacom, John F, Bell, Nicole F, Mack, Gregory D

“…We consider dark matter annihilation into standard model particles and show that the least detectable final states, namely, neutrinos, define an upper bound on…”
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A Survey About Nothing: Monitoring a Million Supergiants for Failed Supernovae by Kochanek, Christopher S, Beacom, John F, Kistler, Matthew D, Prieto, José L, Stanek, Krzysztof Z, Thompson, Todd A, Yüksel, Hasan

“…Extragalactic transient searches have historically been limited to looking for the appearance of new sources such as supernovae. It is now possible to carry…”
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An Unexpectedly Swift Rise in the Gamma-Ray Burst Rate by Kistler, Matthew D, Yüksel, Hasan, Beacom, John F, Stanek, Krzysztof Z

“…The association of long gamma-ray bursts with supernovae naturally suggests that the cosmic GRB rate should trace the star formation history. Finding otherwise…”
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Gamma-ray constraint on galactic positron production by MeV dark matter by BEACOM, John F, BELL, Nicole F, BERTONE, Gianfranco

“…The Galactic positrons, as observed by their annihilation gamma-ray line at 0.511 MeV, are difficult to account for with astrophysical sources. It has been…”
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The Diffuse Supernova Neutrino Background by Beacom, John F.

“…The diffuse supernova neutrino background (DSNB) is the weak glow of megaelectronvolt neutrinos and antineutrinos from distant core-collapse supernovae. The…”
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