2019/05/27 by C. S. An, Chun-Sheng An, B. Saghaï +1
Chemistry · Physics and Astronomy · #Angular momentum #Asymmetry #Charm (quantum number) #Chemistry #Fock space #Nuclear physics #Operator (biology) #Particle physics #Particle physics theoretical and experimental studies #Physics #Proton #Pulsars and Gravitational Waves Research #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Quark #Quark model #Quarkonium #hep-ph
paper · pdf · doi:10.1103/physrevd.99.094039
published as Phys. Rev. D 99, 094039 (2019) · typos corrected
arxiv created 2019/05/27 · openalex publication_date 2019/05/28 · openalex created_date 2019/05/29 · arxiv updated 2019/06/05 · openalex updated_date 2026/08/05
The orbital angular momentum (Lq) of the proton is studied by employing the extended constituent quark model. Contributions from different flavors, namely, up, down, strange, and charm quarks in the proton are investigated. Probabilities of the intrinsic qq pairs are calculated using a 3P0 transition operator to fit the sea flavor asymmetry Ia=d\ensuremath-u=0.118\ifmmode±\else\textpm\fi0.012 of the proton [1]. Our numerical results lead to Lq=0.158\ifmmode±\else\textpm\fi0.014, in agreement with 4/3Ia=0.157\ifmmode±\else\textpm\fi0.016, and consistent with findings based on various other approaches.