Zobrazeno 1 - 10
of 122
pro vyhledávání: '"Sevrin, Alexander"'
The recent results from the Pulsar Timing Array (PTA) collaborations show the first evidence for the detection of a stochastic background of gravitational waves at the nHz frequencies. This discovery has profound implications for the physics of both
Externí odkaz:
http://arxiv.org/abs/2306.17830
Chiral bosons, or self-dual p-form fields, are ubiquitous in string theoretic contexts but are challenging to treat. Lagrangian constructions invariably introduce a complexity be it auxiliary fields or sacrificing Lorentz invariance. In this note we
Externí odkaz:
http://arxiv.org/abs/2212.11412
Publikováno v:
JCAP 04 (2023) 008
We study the early Universe evolution of axion-like particle (ALP) domain walls taking into account the effect of friction from particles in the surrounding plasma, including the case of particles in thermal equilibrium and frozen out species. We cha
Externí odkaz:
http://arxiv.org/abs/2210.14246
Autor:
Badger, Charles, Fornal, Bartosz, Martinovic, Katarina, Romero, Alba, Turbang, Kevin, Guo, Huai-Ke, Mariotti, Alberto, Sakellariadou, Mairi, Sevrin, Alexander, Yang, Feng-Wei, Zhao, Yue
We investigate the reach of the LIGO/Virgo/KAGRA detectors in the search for signatures of first-order phase transitions in the early Universe. Utilising data from the first three observing runs, we derive constraints on the parameters of the underly
Externí odkaz:
http://arxiv.org/abs/2209.14707
The doubled formulation of the worldsheet provides a description of string theory in which T-duality is promoted to a manifest symmetry. Here we extend this approach to $\mathcal{N}=(2,2)$ superspace providing a doubled formulation for bi-Hermitian/g
Externí odkaz:
http://arxiv.org/abs/2205.06017
Autor:
Caldwell, Robert, Cui, Yanou, Guo, Huai-Ke, Mandic, Vuk, Mariotti, Alberto, No, Jose Miguel, Ramsey-Musolf, Michael J., Sakellariadou, Mairi, Sinha, Kuver, Wang, Lian-Tao, White, Graham, Zhao, Yue, An, Haipeng, Caprini, Chiara, Clesse, Sebastien, Cline, James, Cusin, Giulia, Jinno, Ryusuke, Laurent, Benoit, Levi, Noam, Lyu, Kunfeng, Martinez, Mario, Miller, Andrew, Redigolo, Diego, Scarlata, Claudia, Sevrin, Alexander, Haghi, Barmak Shams Es, Shu, Jing, Siemens, Xavier, Steer, Daniele A., Sundrum, Raman, Tamarit, Carlos, Weir, David J., Fornal, Bartosz, Xie, Ke-Pan, Yang, Fengwei, Zhou, Siyi
Publikováno v:
Gen Relativ Gravit 54, 156 (2022)
Detection of a gravitational-wave signal of non-astrophysical origin would be a landmark discovery, potentially providing a significant clue to some of our most basic, big-picture scientific questions about the Universe. In this white paper, we surve
Externí odkaz:
http://arxiv.org/abs/2203.07972
We present a novel baryogenesis mechanism in which the asymmetry is sourced from heavy particles which either gain their mass or are created during bubble expansion in a strong first order phase transition. These particles then decay in a CP and bary
Externí odkaz:
http://arxiv.org/abs/2106.15602
We construct integrable deformations of the $\lambda$-type for asymmetrically gauged WZW models. This is achieved by a modification of the Sfetsos gauging procedure to account for a possible automorphism that is allowed in $G/G$ models. We verify cla
Externí odkaz:
http://arxiv.org/abs/1902.04142
We show that the geometric interpretation of D-branes in WZW models as twisted conjugacy classes persists in the $\lambda$--deformed theory. We obtain such configurations by demanding that a monodromy matrix constructed from the Lax connection of the
Externí odkaz:
http://arxiv.org/abs/1806.10712
We study generalized Kahler structures on N = (2, 2) supersymmetric Wess-Zumino-Witten models; we use the well known case of SU(2) x U(1) as a toy model and develop tools that allow us to construct the superspace action and uncover the highly nontriv
Externí odkaz:
http://arxiv.org/abs/1804.03259