Results 51 to 60 of about 64,447 (308)

Remarks on the group-theoretical foundations of particle physics

International Journal of Geometric Methods in Modern Physics, 2022
I propose using the group [Formula: see text] as a generalization of the Dirac group [Formula: see text] used in quantum mechanics, in an attempt to match the symmetries of the ‘internal’ spacetime of elementary particles to the symmetries of the ‘external’ spacetime of general relativity.
openaire   +2 more sources

Molecular dynamics simulations of positively selected codons in FcγRI reveal novel biochemical binding properties

FEBS Open Bio, EarlyView.
Evolutionary analysis across 32 placental mammals identified positive selection at residues H148 and W149 in the immune receptor FcγR1. Ancestral reconstruction combined with molecular dynamics simulations reveals how these mutations may influence receptor structure and dynamics, providing insight into the evolution of antibody recognition and immune ...
David A. Young, Omar Arias‐Gaguancela, Fiona Gibson, Morgan Grainger, Jodie Score, Amit Nathubhai, Mauricio Cafiero, Lee Richard Machado   +7 more
wiley   +1 more source

Lattice Computations for Beyond Standard Model Physics [PDF]

, 2022
Understanding the dynamics of strongly coupled non-Abelian gauge theories constitutes one of the ongoing grand challenges in theoretical physics. This has been motivated by the need to understand long-distance behavior of quantum chromodynamics, and by ...
Kari Rummukainen, Kimmo Tuominen, Rummukainen, Kari, Tuominen, Kimmo   +3 more
core   +1 more source

Nested soft-collinear subtractions in NNLO QCD computations

European Physical Journal C: Particles and Fields, 2017
We discuss a modification of the next-to-next-to-leading order (NNLO) subtraction scheme based on the residue-improved sector decomposition that reduces the number of double-real emission sectors from five to four.
Fabrizio Caola, Kirill Melnikov, Raoul Röntsch   +2 more
doaj   +1 more source

Theoretical nuclear physics---elementary particles [PDF]

, 1989
This report briefly discusses the following topics: Thermodynamics with Wilson Fermions; beta function with Wilson Fermions; grand challenge; light flavors and nonperturbative QCD; the spin structure of the proton; the heavy Higgs Meson Problem; the heavy top quark problem; SU(2) Higgs Model; nontrivial quantum electrodynamics; vortex sheet dynamics ...
openaire   +2 more sources

Experimental Evaluation of 100Cr6 Steel Microindented Surfaces Under Lubricated Nonconformal Point Contacts

Advanced Engineering Materials, EarlyView.
The tribological behavior of 100Cr6 steel spheres textured via Vickers microindentation is evaluated under lubricated sliding by varying both dimple size and density. Fine and dense textures significantly reduce friction across all lubrication regimes, while large dimples increase it.
Farideh Davoodi, Pasquale Guglielmi, Gianfranco Palumbo, Giuseppe Carbone   +3 more
wiley   +1 more source

Review of Particle Physics, 1998-1999

, 1998
A comprehensive review of the field of Particle Physics produced by the Particle Data Group (PDG). Includes a compilation/evaluation of data on particle properties, summary tables with best values and limits for particle properties, extensive summari ...
Sjöstrand, Torbjörn, Gaisser, Thomas K, Gerber, Hans Jürg, Burchat, Patricia R, Srednicki, Mark A, Dalitz, Richard Henry, Törnqvist, N A, Wolfenstein, Lincoln, Workman, Ronald L, Gilman, Frederick J, Schindler, Rafe H, Voss, Rüdiger, Youssef, Saul, Renk, Burkhard, Babu, K S, Höhler, Gerhard, Hagmann, Christian, Hagiwara, Kaoru, Kayser, Boris, Raffelt, Georg G, Roos, Matts, Rosenberg, Leslie J, Gurtu, Atul, Groom, Donald E, Wohl, Charles G, Damour, Thibault Marie Alban Guillaume, Spanier, Stefan, Conforto, Gianni, Johnson, Kurtis F, Manohar, Aneesh Vasant, Crawford, Ronald L, Hikasa, Ken Ichi, Biebel, Otmar, Froidevaux, Daniel, Lugovsky, S B, Barnett, Richard Michael, Smoot, George F, Carone, Christopher D, Olive, Keith A, Nicholson, Flic, March-Russell, John David, Hayes, Kenneth G, Knowles, Ian G, Van Bibber, Karl, Besson, Dave, Donahue, Richard J, Littenberg, Laurence S, Goodman, Maury, Jackson, John David, Murayama, Hitoshi, James, Frederick E, Landua, Rolf, Tanabashi, Masaharu, Quinn, Helen R, Langacker, Paul, Dahl, Orin, Desler, Kai, Amsler, Claude, Grab, C, Nakamura, Kenzo, Kolda, Christopher, Piepke, Andreas, Valencia, German, Cahn, Robert N, Manley, D Mark, Suzuki, Mahiko, Eidelman, Simon, Erler, Jens, Casas-Serradilla, José Luís, Geer, Steve, Edwards, Donald A, Haber, Howard E, Garren, Lynn, Stanev, Todor, Nakada, Tatsuya, Karlen, Dean A, Hinchliffe, Ian, Tkachenko, N P, Doser, Michael, Scott, Douglas, Mankov, Serguei, Ronan, Michael T, Caso, Carlo, Hernández, Juan José, Yao Wei Ming, Schramm, David N, Armstrong, Betty, Schmitt, Michael, Hogan, Craig J, Gee, Paul S, Trippe, Thomas G, Mönig, Klaus, Honscheid, Klaus, Fassò, A, Filimonov, Boris B, Aguilar-Benítez, M, Feng, Jonathan L, Kleinknecht, Konrad, Ezhela, Vladimir V, Kreitz, Pat, Mangano, Michelangelo L, Vogel, Petr, Fetscher, Wulf, Shrock, Robert E   +103 more
core   +1 more source

Tetraquarks at large M and large N

Journal of High Energy Physics
We study tetraquarks in large N QCD with heavy quarks, in the domain where non-relativistic quantum mechanics offers an adequate approximation. Within the regime of validity of the Born-Oppenheimer approximation, we systematically study and explicitly ...
Héloïse Allaman, Majid Ekhterachian, Filippo Nardi, Riccardo Rattazzi, Stefan Stelzl   +4 more
doaj   +1 more source

Models for total, elastic and diffractive cross sections

European Physical Journal C: Particles and Fields, 2018
The LHC has brought much new information on total, elastic and diffractive cross sections, which is not always in agreement with extrapolations from lower energies. The default framework in the Pythia event generator is one case in point. In this article
Christine O. Rasmussen, Torbjörn Sjöstrand   +1 more
doaj   +1 more source

Improved BBN constraints on the variation of the gravitational constant

European Physical Journal C: Particles and Fields, 2020
Big Bang Nucleosynthesis (BBN) is very sensitive to the cosmological expansion rate. If the gravitational constant G took a different value during the nucleosynthesis epoch than today, the primordial abundances of light elements would be affected.
James Alvey, Nashwan Sabti, Miguel Escudero, Malcolm Fairbairn   +3 more
doaj   +1 more source