= LPAIR Analysis = == Introduction == This study is meant to investigate the parton distribution function in [[http://www.desy.de/~heramc/programs/lpair/lpair.pdf|LPAIR Monte Carlo generator]] w.r.t. the inelastic collision when the incoming proton breaks up into a hadronic final state. The built-in options in LPAIR make use of two parametrizations for the parton densities inside the proton, namely: 1. BRASSE [[http://www.sciencedirect.com/science/article/pii/0550321376902315|DESY 76/11 (1976)]] with option 12 in the LPAIR card; and 2. SURI-YENNIE [[http://www.sciencedirect.com/science/article/pii/0003491672902424|Ann. of Phys. 72 (1972) 243]] with option 11.