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- Institute for Research in Fundamental SciencesIR51 papers
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6 papers · 2 filters
Angular analysis of polarized top quark decay into B-mesons in two different helicity systems
S. Mohammad Moosavi Nejad, Mahboobe Balali
We calculate the radiative corrections to the spin dependent differential decay rates of the process . These are needed to study the angular dis…
Parton densities with the quark linear potential in the statistical approach
A. Mirjalili, M. Dehghani, M. M. Yazdanpanah
The statistical approach is used to calculate the parton distribution functions (PDFs) of the nucleon. At first it is assumed that the partons are free particles and the light-fron…
The meson polarized distribution function and mass dependence of the nucleon parton densities
A. Mirjalili, K. Keshavarzian
The polarized distribution functions of mesons, including pion, kaon and eta, using the proton structure function, are calculated. We are looking for a relationship between the pol…
Global analysis of fragmentation functions and their application to polarized top quark decays considering new {\it BABAR} and {\it Belle} experimental data
S. M. Moosavi Nejad, M. Soleymaninia, A. N. Khorramian
Recently, the {\it Belle} and {\it BABAR} Collaborations published the single-inclusive electron-positron annihilation data at the center of mass energies () of G…
Target mass correction, based on the re-scaled parton densities
M. M. Yazdanpanah, R. Mohammadi pour, A. Mirjalili
Target mass correction (TMC) is being used to improve the theoretical results for the nucleon structure functions. This improvement makes the fitting more reliable with the availab…
Gluon fragmentation into S-wave heavy quarkonium
S. Mohammad Moosavi Nejad, Delpasand Mahdi
Fragmentation is the dominant production mechanism for heavy hadronic bound states with large transverse momentum. We numerically calculate the initial f…