Collinearity approximations and kinematic shifts in partonic shower algorithms

The European Physical Journal C

H. Jung¹  F. Hautmann² 

[1] Deutsches Elektronen Synchrotron, 22603, Hamburg, Germany;University of Oxford, Physics Department, OX1 3NP, Oxford, UK;

关键词: Large Hadron Collider;    Transverse Momentum;    Parton Showering;    Parton Distribution Function;    Longitudinal Momentum;   

DOI  :  10.1140/epjc/s10052-012-2254-0

来源: Springer

【 摘 要 】

We study kinematic effects due to the approximation of on-shell, collinear partons in shower Monte Carlo event generators. We observe that the collinearity approximation, combined with the requirements of energy-momentum conservation, gives rise to a kinematic shift, event by event, in longitudinal momentum distributions. We present numerical results in the case of jet and heavy-flavor production processes measured at the LHC.

【 授权许可】

CC BY