7 citations · 10 across the 7 of their papers we have counts for
9 papers
Bootstrapping Weakly Broken Gauge Theories in (A)dS
Daniel Baumann, Kurt Hinterbichler, Callum R. T. Jones +1
We develop a bootstrap approach for weakly broken gauge theories in (anti-)de Sitter space, focusing on cases in which the conservation of the dual boundary current is broken by a…
Differential Equations for Massive Correlators
Daniel Baumann, Austin Joyce, Hayden Lee +1
We uncover a combinatorial structure governing the differential equations satisfied by wavefunction coefficients of scalar fields with generic masses in de Sitter space. Using an i…
The Cosmological Grassmannian
Mattia Arundine, Daniel Baumann, Mang Hei Gordon Lee +2
We introduce the orthogonal Grassmannian as a novel kinematic space for describing correlators of massless spinning fields in de Sitter space. By automatically encoding the constra…
Constraints on Long-Range Forces in De Sitter Space
Daniel Baumann, Kurt Hinterbichler, Callum R. T. Jones +4
The representation theory of de Sitter space admits partially massless (PM) particles, but whether such particles can participate in consistent interacting theories remains unclear…
Geometry of Kinematic Flow
Daniel Baumann, Harry Goodhew, Austin Joyce +3
We uncover a geometric organization of the differential equations for the wavefunction coefficients of conformally coupled scalars in power-law cosmologies. To do this, we introduc…
Kinematic Flow for Cosmological Loop Integrands
Daniel Baumann, Harry Goodhew, Hayden Lee
Recently, an interesting pattern was found in the differential equations satisfied by the Feynman integrals describing tree-level correlators of conformally coupled scalars in a po…
A New Twist on Spinning (A)dS Correlators
Daniel Baumann, Grégoire Mathys, Guilherme L. Pimentel +1
Massless spinning correlators in cosmology are extremely complicated. In contrast, the scattering amplitudes of massless particles with spin are very simple. We propose that the re…
Kinematic Flow and the Emergence of Time
Nima Arkani-Hamed, Daniel Baumann, Aaron Hillman +3
Perhaps the most basic question we can ask about cosmological correlations is how their strength changes as we smoothly vary kinematic parameters. The answer is encoded in differen…
Differential Equations for Cosmological Correlators
Nima Arkani-Hamed, Daniel Baumann, Aaron Hillman +3
Cosmological fluctuations retain a memory of the physics that generated them in their spatial correlations. The strength of correlations varies smoothly as a function of external k…