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ω Meson from Lattice QCD.
Phys Rev Lett
November 2024
Helmholtz-Institut für Strahlen- und Kernphysik (Theorie) and Bethe Center for Theoretical Physics, Universität Bonn, 53115 Bonn, Germany.
Many excited states in the hadron spectrum have large branching ratios to three-hadron final states. Understanding such particles from first principles QCD requires input from lattice QCD with one-, two-, and three-meson interpolators as well as a reliable three-body formalism relating finite-volume spectra at unphysical pion mass values to the scattering amplitudes at the physical point. In this work, we provide the first-ever calculation of the resonance parameters of the ω meson from lattice QCD, including an update of the formalism through matching to effective field theories.
View Article and Find Full Text PDFTissue-specific dose equivalents of secondary mesons and leptons during galactic cosmic ray exposures for mars exploration.
Life Sci Space Res (Amst)
May 2024
Department of Health Physics and Diagnostic Sciences, School of Integrated Health Sciences, University of Nevada, Las Vegas, NV 89154, United States. Electronic address:
During a human mission to Mars, astronauts would be continuously exposed to galactic cosmic rays (GCR) consisting of high energy protons and heavier ions coming from outside our solar system. Due to their high energy, GCR ions can penetrate spacecraft and space habitat structures, directly reaching human organs. Additionally, they generate secondary particles when interacting with shielding materials and human tissues.
View Article and Find Full Text PDFQuark Mass Dependence of Heavy Quark Diffusion Coefficient from Lattice QCD.
Phys Rev Lett
February 2024
Insitut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstraße 2, D-64289 Darmstadt, Germany.
We present the first study of the quark mass dependence of the heavy quark momentum and spatial diffusion coefficients using lattice QCD with light dynamical quarks corresponding to a pion mass of 320 MeV. We find that, for the temperature range 195 MeV
Quantum chromodynamics, the theory of the strong force, describes interactions of coloured quarks and gluons and the formation of hadronic matter. Conventional hadronic matter consists of baryons and mesons made of three quarks and quark-antiquark pairs, respectively. Particles with an alternative quark content are known as exotic states.
View Article and Find Full Text PDFResonant Self-Interacting Dark Matter from Dark QCD.
Phys Rev Lett
April 2022
Department of Physics, University of California, Berkeley, California 94720, USA.
We present new models utilizing QCD-like dark sectors to resolve small-scale structure problems. These models of resonant self-interacting dark matter in a dark sector with QCD are based on analogies to the meson spectra in standard model QCD. We introduce a simple model that realizes resonant self-interaction (analogous to the ϕ-K-K system) and thermal freeze-out, in which dark mesons are made of two light quarks.
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