459 research outputs found
The Effect of Multiple Cooling Channels on the Formation of Dark Compact Objects
A dissipative dark sector can result in the formation of compact objects with
masses comparable to stars and planets. In this work, we investigate the
formation of such compact objects from a subdominant inelastic dark matter
model, and study the resulting distributions of these objects. In particular,
we consider cooling from dark Bremsstrahlung and a rapid decay process that
occurs after inelastic upscattering. Inelastic transitions introduce an
additional radiative processes which can impact the formation of compact
objects via multiple cooling channels. We find that having multiple cooling
processes changes the mass and abundance of compact objects formed, as compared
to a scenario with only one cooling channel. The resulting distribution of
these astrophysical compact objects and their properties can be used to further
constrain and differentiate between dark sectors.Comment: 20 pages, 4 figure
Spermatic Vein Tumor Thrombus In Renal Cell Carcinoma
Renal cell carcinoma has the tendency to form venous thrombi. This may involve the renal veins or the inferior vena cava and may extend cephalad/antegrade into the right atrium. We report a patient with renal cell carcinoma who had an intracaval tumor thrombus that had extended into the right spermatic vein. We believe this to be the first description in English literature of a histologically proven renal cell carcinoma thrombus in the spermatic vein
Supporting researchers conducting qualitative research into sensitive, challenging, and difficult topics: Experiences and practical applications.
Qualitative researchers often engage in work addressing challenging, difficult, or sensitive topics and are consequently exposed to the participants’ narratives which may be emotionally charged, distressing, or compromising. These narratives occasionally rest heavy on a researcher’s conscience or may linger in the mind. Much literature has assessed how best to keep participants safe, but less attention has been given to how we keep researchers safe. We therefore document the following: (1) Our experiences of the issues presented by undertaking qualitative research involving challenging, difficult, or sensitive topics; and (2) Practical principles devised to overcome these issues, ensuring safety and wellbeing amongst researchers engaging in these types of qualitative research. We provide guidance for qualitative researchers of all levels of experience and expertise on how best to protect and support themselves, their colleagues, and other collaborating research staff, when undertaking qualitative research which might otherwise feel uncomfortable or overwhelming to tackle
Inhomogeneous non-Gaussianity
We propose a method to probe higher-order correlators of the primordial
density field through the inhomogeneity of local non-Gaussian parameters, such
as f_NL, measured within smaller patches of the sky. Correlators between
n-point functions measured in one patch of the sky and k-point functions
measured in another patch depend upon the (n+k)-point functions over the entire
sky. The inhomogeneity of non-Gaussian parameters may be a feasible way to
detect or constrain higher-order correlators in local models of
non-Gaussianity, as well as to distinguish between single and multiple-source
scenarios for generating the primordial density perturbation, and more
generally to probe the details of inflationary physics.Comment: 16 pages, 2 figures; v2: Minor changes and references added. Matches
the published versio
Physics at a 100 TeV pp collider: beyond the Standard Model phenomena
This report summarises the physics opportunities in the search and study of
physics beyond the Standard Model at a 100 TeV pp collider.Comment: 196 pages, 114 figures. Chapter 3 of the "Physics at the FCC-hh"
Repor
Evans Committee Statement on Pioneer
Letter from University of Denver faculty and alumni on the university\u27s use of the \u27Pioneer\u27 moniker
Signal yields, energy resolution, and recombination fluctuations in liquid xenon
This work presents an analysis of monoenergetic electronic recoil peaks in
the dark-matter-search and calibration data from the first underground science
run of the Large Underground Xenon (LUX) detector. Liquid xenon charge and
light yields for electronic recoil energies between 5.2 and 661.7 keV are
measured, as well as the energy resolution for the LUX detector at those same
energies. Additionally, there is an interpretation of existing measurements and
descriptions of electron-ion recombination fluctuations in liquid xenon as
limiting cases of a more general liquid xenon re- combination fluctuation
model. Measurements of the standard deviation of these fluctuations at
monoenergetic electronic recoil peaks exhibit a linear dependence on the number
of ions for energy deposits up to 661.7 keV, consistent with previous LUX
measurements between 2-16 keV with H. We highlight similarities in liquid
xenon recombination for electronic and nuclear recoils with a comparison of
recombination fluctuations measured with low-energy calibration data.Comment: 11 pages, 12 figures, 3 table
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