A5106944412- Cosmology and Gravitation Theories
- Atomic and Subatomic Physics Research
- Quantum, superfluid, helium dynamics
- Black Holes and Theoretical Physics
- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Advanced NMR Techniques and Applications
- Relativity and Gravitational Theory
- Neutrino Physics Research
- advanced mathematical theories
- Cold Atom Physics and Bose-Einstein Condensates
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Geophysics and Gravity Measurements
- Superconducting Materials and Applications
- Quantum Electrodynamics and Casimir Effect
University of Chile
2023-2024
Bryn Mawr College
2023-2024
University of California, Davis
2023-2024
Massachusetts Institute of Technology
2024
Columbia University
2023
Stanford Synchrotron Radiation Lightsource
2005
SLAC National Accelerator Laboratory
2005
California Institute of Technology
2002-2004
We have measured the spin structure functions $g_1$ and $g_2$ of $^3$He in a double-spin experiment by inclusively scattering polarized electrons at energies ranging from 0.862 to 5.07 GeV off target 15.5$^{\circ}$ angle. Excitation covered resonance onset deep inelastic regions. determined for first time $Q^2$ evolution $\Gamma_1(Q^2)=\int_0^{1} g_1(x,Q^2) dx$, $\Gamma_2(Q^2)=\int_0^1 g_2(x,Q^2) dx$ $d_2 (Q^2) = \int_0^1 x^2[ 2g_1(x,Q^2) + 3g_2(x,Q^2)] neutron range 0.1 GeV$^2$ $\leq Q^2...
We investigate a cosmological model in which fraction of the dark matter is atomic (ADM). This ADM consists versions electron and proton, interacting with each other photons just as their light sector do, but everything else only gravitationally. find constraints given current cosmic microwave background (CMB) baryon acoustic oscillation (BAO) data, without an ${H}_{0}$ prior, enforcing big bang nucleosynthesis consistent helium abundance. that, at low photon temperature, one can have...
Correlation functions of light scalars in de Sitter space, computed standard perturbation theory, are hindered by time-dependent infrared divergences the form powers $\ln a(t)$, where $a(t)$ is scale factor describing expansion space. It has often been pointed out that loop corrections to these correlation make their divergence even stronger. In this note, we argue not case: Loop can be treated systematically with perturbative techniques (such as dimensional regularization) without...
We analyze the computation of $n$-point correlation functions in de Sitter spacetime, including loop corrections, using wavefunction universe approach. This method consists two stages employing distinct Feynman rules. First, one must compute coefficients interactions as vertices. Then, second stage, computes For massless fields, corrections first stage are free infrared (IR) divergences, which leads to question how this matches well-known IR behavior correlators obtained via other methods....
Correlation functions of light scalar fields in de Sitter spacetime, computed via standard perturbation theory, often exhibit secular growth characterized by time-dependent divergent terms the form powers <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mi>ln</a:mi><a:mi>a</a:mi><a:mo stretchy="false">(</a:mo><a:mi>t</a:mi><a:mo stretchy="false">)</a:mo></a:mrow></a:math>, where <e:math xmlns:e="http://www.w3.org/1998/Math/MathML"...
We investigate a cosmological model in which fraction of the dark matter is atomic (ADM). This ADM consists versions electron and proton, interacting with each other photons just as their light sector do, but everything else only gravitationally. find constraints given current cosmic microwave background (CMB) baryon acoustic oscillation (BAO) data, without an $H_0$ prior, enforcing big bang nucleosynthesis consistent helium abundance. that, at low photon temperature, one can have...