2014/02/28 by S. Mohammad Moosavi Nejad, S. M. Moosavi Nejad, Maryam Soleymaninia +3
Physics and Astronomy · #Annihilation #Electron #Electron–positron annihilation #Energy (signal processing) #Fragmentation (computing) #Hadron #High-Energy Particle Collisions Research #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Positron #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Quark #Top quark #hep-ph
paper · pdf · doi:10.1139/cjp-2016-0437
published as Canadian Journal of Physics, 10.1139/cjp-2016-0437 · 10 pages, 10 figures
arxiv created 2014/03/05 · openalex publication_date 2016/09/29 · openalex created_date 2016/10/07 · arxiv updated 2016/11/24 · openalex updated_date 2026/08/05
Recently, the Belle and BABAR collaborations published the single-inclusive electron–positron annihilation data at the center of mass energies ([Formula: see text]) of 10.52 and 10.54 GeV, respectively. These new data offer one the possibility to determine the nonperturbative initial conditions of fragmentation functions (FFs) much more accurately. Here, we extract the FFs of π ± and K ± particles at next-to-leading order (NLO) including these new data, which are in the regions of larger scaled-energy z and lower [Formula: see text]. However, the π ± and K ± FFs were calculated previously, but our new analysis shows that adding these new data, for instance, changes the (u, s) → π + FFs in the large-z region while the s → π + FF is also changed at low z. These new data also change the u → K + FF at low z (z < 0.2) more than at large z, but the d → K + FF is affected at z > 0.07. The FF of g → K + is decreased everywhere, for example, about 25% at z = 0.01. We also apply, for the first time, the extracted FFs to make our predictions for the scaled-energy distributions of π ± and K ± inclusively produced in top quark decays at NLO.