Zobrazeno 1 - 10
of 3 801
pro vyhledávání: '"Graham, D. P."'
A new dark matter candidate is proposed that arises as the lightest baryon from a confining $SU(N)$ gauge theory which equilibrates with the Standard Model only through electroweak interactions. Surprisingly, this candidate can be as light as a few G
Externí odkaz:
http://arxiv.org/abs/2412.14540
Dark matter could be a baryonic composite of strongly-coupled constituents transforming under SU(2)$_L$. We classify the SU(2)$_L$ representations of baryons in a class of simple confining dark sectors and find that the lightest state can be a pure s
Externí odkaz:
http://arxiv.org/abs/2412.14240
We identify symmetries in a broad class of vector-like confining dark sectors that forbid the leading electromagnetic moments that would ordinarily mediate dark baryon scattering with the Standard Model. The absence of these operators implies dark ba
Externí odkaz:
http://arxiv.org/abs/2410.23631
Autor:
Graham, D. B., Khotyaintsev, Yu. V.
Low Mach number collisionless shocks are routinely observed in the solar wind and upstream of planetary bodies. However, most in situ observations have lacked the necessary temporal resolution to directly study the kinetic behavior of ions across the
Externí odkaz:
http://arxiv.org/abs/2409.09552
Autor:
Stawarz, J. E., Muñoz, P. A., Bessho, N., Bandyopadhyay, R., Nakamura, T. K. M., Eriksson, S., Graham, D., Büchner, J., Chasapis, A., Drake, J. F., Shay, M. A., Ergun, R. E., Hasegawa, H., Khotyaintsev, Yu. V., Swisdak, M., Wilder, F.
Alongside magnetic reconnection, turbulence is another fundamental nonlinear plasma phenomenon that plays a key role in energy transport and conversion in space and astrophysical plasmas. From a numerical, theoretical, and observational point of view
Externí odkaz:
http://arxiv.org/abs/2407.20787
Autor:
Nakamura, R., Burch, J. L., Birn, J., Chen, L. -J., Graham, D. B., Guo, F., Hwang, K. -J., Ji, H., Khotyaintsev, Y., Liu, Y. -H., Oka, M., Payne, D., Sitnov, M. I., Swisdak, M., Zenitani, S., Drake, J. F., Fuselier, S. A., Genestreti, K. J., Gershman, D. J., Hasegawa, H., Hoshino, M., Norgren, C., Shay, M. A., Shuster, J. R., Stawarz, J. E.
This short article highlights the unsolved problems of magnetic reconnection in collisionless plasma. The advanced in-situ plasma measurements and simulations enabled scientists to gain a novel understanding of magnetic reconnection. Still, outstandi
Externí odkaz:
http://arxiv.org/abs/2407.09670
Publikováno v:
Nat Rev Phys 6, 500-508 (2024)
Speckle patterns are a powerful tool for high-precision metrology, as they allow remarkable performance in relatively simple setups. Nonetheless, researchers in this field follow rather distinct paths due to underappreciated general principles underl
Externí odkaz:
http://arxiv.org/abs/2403.19301
Autor:
Colomban, L., Kretzschmar, M., Krasnoselkikh, V., Agapitov, O. V., Froment, C., Maksimovic, M., Berthomier, M., Khotyainsev, Yu. V., Graham, D. B., Bale, S.
The evolution of the solar wind electron distribution function with heliocentric distance exhibits different features that are still unexplained, in particular, the increase of the Strahl pitch angle width. Wave-particle interactions between electron
Externí odkaz:
http://arxiv.org/abs/2402.06016
Inelastic dark matter with moderate splittings, $\mathcal{O}({\rm few} \; {\rm to} \; 150)$ keV, can upscatter to an excited state in the Earth, with the excited state subsequently decaying, leaving a distinctive monoenergetic photon signal in large
Externí odkaz:
http://arxiv.org/abs/2312.08478
Autor:
Brower, Richard C., Culver, Christopher, Cushman, Kimmy K., Fleming, George T., Hasenfratz, Anna, Howarth, Dean, Ingoldby, James, Jin, Xiao Yong, Kribs, Graham D., Meyer, Aaron S., Neil, Ethan T., Osborn, James C., Owen, Evan, Park, Sungwoo, Rebbi, Claudio, Rinaldi, Enrico, Schaich, David, Vranas, Pavlos, Weinberg, Evan, Witzel, Oliver
We present non-perturbative lattice calculations of the low-lying meson and baryon spectrum of the SU(4) gauge theory with fundamental fermion constituents. This theory is one instance of stealth dark matter, a class of strongly coupled theories, whe
Externí odkaz:
http://arxiv.org/abs/2312.07836