Sea quark and gluon contents of light mesons at low Q2 scale
Faculty of physics, Shahid Bahonar University of Kerman, Kerman, Iran
2 Mahani Mathematical Research Center, Shahid Bahonar University of Kerman, Kerman, Iran
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Accepted: 5 June 2019
Published online: 8 August 2019
We investigate the contributions of sea quarks and gluon to the structure of pion and kaon at low Q2 scale. To this end, we calculate the sea quark and gluon distribution functions of these mesons applying the modified chiral quark model ( . We also compute the total momentum fraction which is carried by sea quarks and gluon in and K+ mesons. It is found that sea quarks and gluon carry about 30% of total momentum of the light mesons at GeV^2. Furthermore, it is shown that the gluon contents of pion and kaon are different. On the other hand, we obtain the quark-anti quark asymmetry of the strange sea and down sea in and K+, respectively. These asymmetries are determined based on the modified QM due to the chiral symmetry breaking.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature, 2019