Andrew Hamilton

About

Andrew Hamilton is a professor in the Astrophysical & Planetary Sciences department at the University of Colorado Boulder. His research interests include Relativity, Cosmology, and Astrophysics. He is involved in exploring theories related to the fundamental nature of the universe, including string theory and unification, as indicated by his recent presentations such as 'String Theory, Unification, and Geometric Algebra.' Hamilton has been active in the field since at least 1982, contributing to the academic community through research and publications. He is based at JILA, where he engages in advanced scientific inquiry related to the structure and origins of the cosmos.

Research topics

• Computer Science
• Geology
• Particle physics
• Physics
• Optics
• Nuclear physics

Selected publications

• The ATLAS Experiment at the CERN Large Hadron Collider

  2008 · 2387 citations

  The Large Hadron Collider (LHC) at CERN will extend the frontiers of particle physics with its
\nunprecedented high energy and luminosity. Inside the LHC, bunches of up to 1011 protons (p)
\nwill collide 40 million times per second to provide 14 TeV proton-proton collisions at a design
\nluminosity of 1034 cm􀀀2s􀀀1. The LHC will also collide heavy ions (A), in particular lead nuclei, at
\n5.5 TeV per nucleon pair, at a design luminosity of 1027 cm􀀀2s􀀀1.
\nThe high interact…

• Determination of jet calibration and energy resolution in proton–proton collisions at $$\sqrt{s} = 8~\hbox {TeV}$$ using the ATLAS detector

  The European Physical Journal C · 2020 · 31 citations

  Abstract The jet energy scale, jet energy resolution, and their systematic uncertainties are measured for jets reconstructed with the ATLAS detector in 2012 using proton–proton data produced at a centre-of-mass energy of 8 TeV with an integrated luminosity of $$20 \, \hbox {fb}^{-1}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mn>20</mml:mn> <mml:mspace/> <mml:msup> <mml:mtext>fb</mml:mtext> <mml:mrow> <mml:mo>-</mml:mo> <mml:mn>1</mml:mn> </mml:mrow> </mml:msup> <…

  DOI

• Hawking radiation inside a charged black hole

  Physical review. D/Physical review. D. · 2023-04-12 · 19 citations

  articleSenior author

  Here we analyze the Hawking radiation detected by an inertial observer in an arbitrary position in a Reissner-Nordstr\"om spacetime, with special emphasis on the asymptotic behavior of the Hawking spectrum as an observer approaches the inner or outer horizon. Two different methods are used to analyze the Hawking flux: first, we calculate an effective temperature quantifying the rate of exponential redshift experienced by an observer from an emitter's vacuum modes, which reproduces the Hawking ef…

  PublisherDOI

• Hawking radiation inside a rotating black hole

  Physical review. D/Physical review. D. · 2024-03-20 · 12 citations

  articleSenior author

  In semiclassical gravity, the vacuum expectation value $⟨\stackrel{^}{N}⟩$ of the particle number operator for a quantum field gives rise to the perception of thermal radiation in the vicinity of a black hole. This Hawking effect has been examined only for observers asymptotically far from a Kerr black hole; here we generalize the analysis to various classes of freely falling observers both outside and inside the Kerr event horizon. Of note, we find that the effective temperature of the $⟨\stack…

  PublisherDOI

• Unification of the four forces in the Spin(11,1) geometric algebra

  Physica Scripta · 2023-06-02 · 3 citations

  articleOpen access1st authorCorresponding

  Abstract SO(10), or equivalently its covering group Spin(10), is a well-known promising grand unified group that contains the standard-model group. The spinors of the group Spin( N ) of rotations in N spacetime dimensions are indexed by a bitcode with [ N /2] bits. Fermions in Spin(10) are described by five bits yzrgb , consisting of two weak bits y and z , and three colour bits r , g , b . If a sixth bit t is added, necessary to accommodate a time dimension, then the enlarged Spin(11, 1) algebr…

  PublisherDOI

Recent grants

• ESP-AST: Black Hole Visualization for the World

  NSF · $249k · 2008–2011

• COLLABORATIVE RESEARCH: Modeling formation of dwarf galaxies from the Cosmic Renaissance to the Present

  NSF · $251k · 2005–2008

Frequent coauthors

• S. De Cecco

  Radboud University Nijmegen

  1649 shared

• B. Trocmé

  Laboratoire AstroParticule et Cosmologie

  1474 shared

• T. Beau

  Consejo Nacional de Investigaciones Científicas y Técnicas

  1359 shared

• J. Ocariz

  Université Paris Cité

  1251 shared

• M. Ridel

  Université Paris Cité

  1234 shared

• L. Roos

  Laboratoire de Physique Nucléaire et de Hautes Énergies

  1233 shared

• S. Trincaz-Duvoid

  Laboratoire de Physique Nucléaire et de Hautes Énergies

  1229 shared

• B. Laforge

  1208 shared

Similar researchers at University of Colorado Boulder

• Daniel Bakerh-132
• Nils Halversonh-80
• Steven Cranmerh-55