By Hua-Sheng Shao
This e-book specializes in the examine of heavy quarkonium creation at high-energy colliders as a useful gizmo to give an explanation for either the perturbative and non-perturbative points of quantum choromodynamics. It offers the 1st finished comparability among the speculation and up to date experiments and clarifies a few longstanding puzzles within the heavy quarkonium creation mechanism. furthermore, it describes intimately a brand new framework for imposing particular computations of the actual observables in quantum box theories in keeping with lately built ideas. it may be used to simulate the advanced collider atmosphere of the big Hadron Collider on the Conseil Européen pour los angeles Recherche Nucléaire (CERN). Its accomplishment means that the Monte Carlo simulations for high-energy physics experiments have reached the boundaries of precision. It deals readers a wealth of worthy info at the correct techniques.
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Extra info for Heavy Quarkonium Production Phenomenology and Automation of One-Loop Scattering Amplitude Computations (Springer Theses)
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Despite that some of them may vanish. 9) and to obtain the final square of matrix elements by (ng +nq )! 10) i,j=1 where Ai and Aj are the color-stripped amplitudes. Finally, we turn to the helicity issue. In a general way, the number of helicity configurations in a process grows as the number of external legs increases. Sometimes, it is a disaster because too many helicity configurations should be computed in a single-phase space point in a sufficiently complicated process. In order to improve the computation efficiency, one usually devotes to a Monte Carlo sampling over the helicity configurations in the program  to perform the helicity summation.