Astrophysics – Page 190 – Kavli Institute Pre-Print Publications

Measurements of $ψ(2S)$ and $χ_c1(3872)$ production within fully reconstructed jets

Posted by klaurent October 23, 2024Stanford

Kavli Affiliate: Philip Marshall| First 5 Authors: LHCb collaboration, LHCb collaboration, , , | Summary:This paper presents the first measurement of $ψ(2S)$ and $χ_c1(3872)$ meson production within fully reconstructed jets. Each quarkonium state (tag) is reconstructed via its decay to the $J/ψ$($rightarrowμ^+μ^-$)$π^+π^-$ final state in the forward region using proton-proton collision data collected by the […]

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Spin Hall and Edelstein Effects in Novel Chiral Noncollinear Altermagnets

Posted by klaurent October 23, 2024Stanford

Kavli Affiliate: Paul Brink| First 5 Authors: Mengli Hu, Mengli Hu, , , | Summary:Altermagnets are a newly discovered class of magnetic phases that combine the spin polarization behavior of ferromagnetic band structures with the vanishing net magnetization characteristic of antiferromagnets. Initially proposed for collinear magnets, the concept has since been extended to include certain […]

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Finite-Momentum Pairing State in Unconventional Rashba Systems

Posted by dbos October 23, 2024November 4, 2024Peking

Kavli Affiliate: Ran Wang | First 5 Authors: Ran Wang, Song-Bo Zhang, Ning Hao, , | Summary: In systems with unconventional Rashba bands, we propose that a finite-momentum pairing state can emerge without the need for an external magnetic field. We analyze the phase transition from a zero-momentum Bardeen-Cooper-Schrieffer (BCS) state to a finite-momentum pairing […]

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Finite-Momentum Pairing State in Unconventional Rashba Systems

Posted by dbos October 23, 2024Peking

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A measurement of atmospheric circular polarization with POLARBEAR

Posted by klaurent October 23, 2024Tokyo

Kavli Affiliate: Tomotake Matsumura| First 5 Authors: Takuro Fujino, Takuro Fujino, , , | Summary:At millimeter wavelengths, the atmospheric emission is circularly polarized owing to the Zeeman splitting of molecular oxygen by the Earth’s magnetic field. We report a measurement of the signal in the 150 GHz band using 3 years of observational data with […]

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Rare Event Classification with Weighted Logistic Regression for Identifying Repeating Fast Radio Bursts

Posted by dbos October 22, 2024November 4, 2024MIT

Kavli Affiliate: Kiyoshi W. Masui | First 5 Authors: Antonio Herrera-Martin, Radu V. Craiu, Gwendolyn M. Eadie, David C. Stenning, Derek Bingham | Summary: An important task in the study of fast radio bursts (FRBs) remains the automatic classification of repeating and non-repeating sources based on their morphological properties. We propose a statistical model that […]

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ATOMS: ALMA three-millimeter observations of massive star-forming regions — XVIII. On the origin and evolution of dense gas fragments in molecular shells of compact HII regions

Posted by dbos October 22, 2024November 4, 2024Peking

Kavli Affiliate: Ke Wang | First 5 Authors: Siju Zhang, Tie Liu, Ke Wang, Annie Zavagno, Guido Garay | Summary: Fragmentation and evolution for the molecular shells of the compact HII regions are less explored compared to their evolved counterparts. We map nine compact HII regions with a typical diameter of 0.4 pc that are […]

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Using the Ca II lines in T Tauri stars to infer the abundance of refractory elements in the innermost disk regions

Posted by dbos October 22, 2024November 4, 2024Peking

Kavli Affiliate: Gregory J. Herczeg | First 5 Authors: Marbely Micolta, Nuria Calvet, Thanawuth Thanathibodee, Gladis Magris C., Carlo F. Manara | Summary: We present a study of the abundance of calcium in the innermost disk of 70 T Tauri stars in the star-forming regions of Chamaeleon I, Lupus and Orion OB1b. We use calcium […]

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Chemical Abundances in the Leiptr Stellar Stream: A Disrupted Ultra-faint Dwarf Galaxy?

Posted by dbos October 22, 2024November 4, 2024Chicago

Kavli Affiliate: Alexander P. Ji | First 5 Authors: Kaia R. Atzberger, Sam A. Usman, Alexander P. Ji, Lara R. Cullinane, Denis Erkal | Summary: Chemical abundances of stellar streams can be used to determine the nature of a stream’s progenitor. Here we study the progenitor of the recently discovered Leiptr stellar stream, which was […]

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Chemical Abundances in the Leiptr Stellar Stream: A Disrupted Ultra-faint Dwarf Galaxy?

Posted by October 22, 2024Chicago

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