Photon+Jet Probes of the Quark-Gluon Plasma Created in Ultra-Relativistic Heavy Ion Collisions
Ғылым және технология
Prof. Dennis V. Perepelitsa
2019 10 21
University of Colorado Boulder
The Relativistic Heavy Ion Collider (RHIC) in New York and the Large Hadron Collider (LHC) in Switzerland accelerate large, fully-ionized nuclei to very near the speed of light. When the nuclei are steered into a head-on collision, the energy density and temperature in the collision zone become so large that the fundamental quark and gluon particles are liberated from their confined state and form a new phase of matter called a Quark-Gluon Plasma (QGP). Although exotic to our everyday experience, QGP is the form which comprised all the matter in our universe during the first few microseconds after the Big Bang. The QGP manifests striking many-body, large-wavelength phenomena which are not obvious from the first-principles of Quantum Chromodynamics (QCD), the theory of the strong nuclear force.
An experimentally fruitful way to understand the composition and behavior of the QGP over many length scales is to probe it with high-energy jets produced by rare scattering processes between the quarks and gluons themselves. In this colloquium, I will discuss some of my research using the ATLAS detector at the LHC and the future sPHENIX detector at RHIC. I will focus on the photon+jet processes where the jets are initially balanced by high-energy photons. Since the photon does not experience the strong interaction, it escapes the QGP region intact and serves as an in situ control probe against which to calibrate QGP-induced modifications to its partner particle jet.
Пікірлер: 2
Quantum Entangled Twisted Tubules: When we draw a sine wave on a blackboard, we are representing spatial curvature. Does a photon transfer spatial curvature from one location to another? Wrap a piece of wire around a pencil and it can produce a 3D coil of wire, much like a spring. When viewed from the side it can look like a two-dimensional sine wave. You could coil the wire with either a right-hand twist, or with a left-hand twist. Could Planck's Constant be proportional to the twist cycles. A photon with a higher frequency has more energy. (More spatial curvature). What if gluons are actually made up of these twisted tubes which become entangled with other tubes to produce quarks. (In the same way twisted electrical extension cords can become entangled.) Therefore, the gluons are actually a part of the quarks. Mesons are made up of two entangled tubes (Quarks/Gluons), while protons and neutrons would be made up of three entangled tubes. (Quarks/Gluons) The "Color Force" would be related to the XYZ coordinates (orientation) of entanglement. "Asymptotic Freedom", and "flux tubes" make sense based on this concept. Neutrinos would be made up of a twisted torus (like a twisted donut) within this model. Gravity is a result of a very small curvature imbalance within atoms. (This is why the force of gravity is so small.) Instead of attempting to explain matter as "particles", this concept attempts to explain matter more in the manner of our current understanding of the space-time curvature of gravity. If an electron has qualities of both a particle and a wave, it cannot be either one. It must be something else. It must be something else. Therefore, a "particle" is actually a structure which stores spatial curvature. Can an electron-positron pair (which are made up of opposite directions of twist) annihilate each other by unwinding into each other producing Gamma Ray photons.
Strobe light by the end. Ends at 48:00