Tootfinder

Closing asset loophole could add billions to tax collections, IRS says
The Biden administration plans to stop businesses and wealthy individuals from manipulating the value of assets in arcane ways such as using the same assets over and over to lower their taxes.
High-end business partnerships like hedge funds and wealthy individuals such as real estate investors have inappropriately used labyrinthine structures to shield tens of billions of dollars from taxation, Treasury Departm…

Closing asset loophole could add billions to tax collections, IRS says — The Washington Post
The Treasury Department plans to enact rules that would prevent certain large businesses from depreciating the same asset repeatedly.

Hadron-ion collisions in Pythia and the vector-meson dominance model for photoproduction
Illka Helenius, Marius Utheim
https://arxiv.org/abs/2406.10403 htt…

Hadron-ion collisions in Pythia and the vector-meson dominance model for photoproduction
We present an extension to the Pythia Monte Carlo event generator that enables simulations of collisions between a generic hadron beam on a nuclear target with energy variation in event-by-event basis. This builds upon Pythia's module for heavy ions, Angantyr, as well as previous work on simulating hadron-proton collisions. As such, the extensions in this work are largely technical, except for a rudimentary model for hadronic fluctuations. With hadron-ion simulations, we implement an explicit v…

Das #Kundenglücklichmachungsposteinlieferungsgeräusch muss heute nur teilweise volle Reisekleidung tragen, eins übergebe ich (sehr ausnahmsweise) persönlich.

Collisional whistler instability and electron temperature staircase in inhomogeneous plasma
N. A. Lopez, A. F. A. Bott, A. A. Schekochihin
https://arxiv.org/abs/2406.10979

Collisional whistler instability and electron temperature staircase in inhomogeneous plasma
High-beta magnetized plasmas often exhibit anomalously structured temperature profiles, as seen from galaxy cluster observations and recent experiments. It is well known that when such plasmas are collisionless, temperature gradients along the magnetic field can excite whistler waves that efficiently scatter electrons to limit their heat transport. Only recently has it been shown that parallel temperature gradients can excite whistler waves also in collisional plasmas. Here we develop a Wigner-…

Hadron-ion collisions in Pythia and the vector-meson dominance model for photoproduction
Illka Helenius, Marius Utheim
https://arxiv.org/abs/2406.10403 htt…

Hadron-ion collisions in Pythia and the vector-meson dominance model for photoproduction
We present an extension to the Pythia Monte Carlo event generator that enables simulations of collisions between a generic hadron beam on a nuclear target with energy variation in event-by-event basis. This builds upon Pythia's module for heavy ions, Angantyr, as well as previous work on simulating hadron-proton collisions. As such, the extensions in this work are largely technical, except for a rudimentary model for hadronic fluctuations. With hadron-ion simulations, we implement an explicit v…

I feel you, Frau #Atelierhütehund.
Aber wenigstens das #Kundenglücklichmachungsposteinlieferungsgeräusch ist voll da.

Fundamental constants from photon-photon scattering in three-beam collisions
Alexander J. Macleod, Ben King
https://arxiv.org/abs/2406.10342 https://

Fundamental constants from photon-photon scattering in three-beam collisions
Direct measurement of the elastic scattering of real photons on an electromagnetic field would allow the fundamental low-energy constants of quantum electrodynamics (QED) to be experimentally determined. We show that scenarios involving the collision of three laser beams have several advantages over conventional two-beam scenarios. The kinematics of a three-beam collision allows for a higher signal-to-noise ratio in the detection region, without the need for polarimetry and separates out contri…

Fundamental constants from photon-photon scattering in three-beam collisions
Alexander J. Macleod, Ben King
https://arxiv.org/abs/2406.10342 https://

Fundamental constants from photon-photon scattering in three-beam collisions
Direct measurement of the elastic scattering of real photons on an electromagnetic field would allow the fundamental low-energy constants of quantum electrodynamics (QED) to be experimentally determined. We show that scenarios involving the collision of three laser beams have several advantages over conventional two-beam scenarios. The kinematics of a three-beam collision allows for a higher signal-to-noise ratio in the detection region, without the need for polarimetry and separates out contri…

This https://arxiv.org/abs/2403.06739 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepp…

Energy loss of a heavy fermion in a collisional QED plasma
We compute the energy loss of heavy fermions moving in a plasma, taking into account the modification of the photon collective modes induced by collisions using a Bhatnagar-Gross-Krook collisional kernel. We include contributions from both hard and soft scatterings of the heavy fermion using a collisionally modified hard-thermal-loop resummed propagator. Using this method, one does not need to introduce a separation scale between hard- and soft-momentum exchanges. To place our calculation in co…