Zobrazeno 1 - 10
of 273
pro vyhledávání: '"Long, Cody"'
The most natural expectation away from asymptotic limits in moduli space of supergravity theories is the desert scenario, where there are few states between massless fields and the quantum gravity cutoff. In this paper we initiate a systematic study
Externí odkaz:
http://arxiv.org/abs/2112.11467
We show that the strong CP problem is solved in a large class of compactifications of string theory. The Peccei-Quinn mechanism solves the strong CP problem if the CP-breaking effects of the ultraviolet completion of gravity and of QCD are small comp
Externí odkaz:
http://arxiv.org/abs/2112.04503
Autor:
Grassi, Antonella, Halverson, James, Long, Cody, Shaneson, Julius L., Sung, Benjamin, Tian, Jiahua
In this paper we study the 6d localized charged matter spectrum of F-theory directly on a singular elliptic Calabi-Yau 3-fold, i.e. without smoothing via resolution or deformation of the entire fibration. Given only the base surface, discriminant loc
Externí odkaz:
http://arxiv.org/abs/2110.06943
Publikováno v:
Commun. Math. Phys. 2022
We study extremal non-BPS black holes and strings arising in M-theory compactifications on Calabi-Yau threefolds, obtained by wrapping M2 branes on non-holomorphic 2-cycles and M5 branes on non-holomorphic 4-cycles. Using the attractor mechanism we c
Externí odkaz:
http://arxiv.org/abs/2104.06420
Autor:
Mehta, Viraf M., Demirtas, Mehmet, Long, Cody, Marsh, David J. E., McAllister, Liam, Stott, Matthew J.
We perform an extensive analysis of the statistics of axion masses and interactions in compactifications of type IIB string theory, and we show that black hole superradiance excludes some regions of Calabi-Yau moduli space. Regardless of the cosmolog
Externí odkaz:
http://arxiv.org/abs/2103.06812
Dark Yang-Mills sectors, which are ubiquitous in the string landscape, may be reheated above their critical temperature and subsequently go through a confining first-order phase transition that produces stochastic gravitational waves in the early uni
Externí odkaz:
http://arxiv.org/abs/2012.04071
Autor:
Mehta, Viraf M., Demirtas, Mehmet, Long, Cody, Marsh, David J. E., McAllister, Liam, Stott, Matthew J.
We obtain constraints from black hole superradiance in an ensemble of compactifications of type IIB string theory. The constraints require knowing only the axion masses and self-interactions, and are insensitive to the cosmological model. We study mo
Externí odkaz:
http://arxiv.org/abs/2011.08693
Publikováno v:
Phys. Rev. D 102, 026012 (2020)
We argue that the following three statements cannot all be true: (i) our vacuum is a type IIB / F-theory vacuum at moderate-to-large $h^{1,1}$, (ii) the $\alpha'$-expansion is controlled via the supergravity approximation, \`a la the KKLT and LVS sce
Externí odkaz:
http://arxiv.org/abs/2004.00630
Autor:
Halverson, James, Long, Cody
Generative models in deep learning allow for sampling probability distributions that approximate data distributions. We propose using generative models for making approximate statistical predictions in the string theory landscape. For vacua admitting
Externí odkaz:
http://arxiv.org/abs/2001.00555
We develop methods for resummation of instanton lattice series. Using these tools, we investigate the consequences of the Weak Gravity Conjecture for large-field axion inflation. We find that the Sublattice Weak Gravity Conjecture implies a constrain
Externí odkaz:
http://arxiv.org/abs/1910.14053