Systematics and limit calculations

Fisher, Wade

Fermi National Accelerator Laboratory

关键词: Calculation Methods Computing, Experiment-Hep;    Functions;    Computing, Experiment-Hep;    Limiting Values;    99 General And Miscellaneous//Mathematics, Computing, And Information Science, 72 Physics Of Elementary Particles And Fields;   

DOI  :  10.2172/923070
RP-ID  :  FERMILAB-TM-2386-E
RP-ID  :  AC02-07CH11359
RP-ID  :  923070

美国|英语

来源: UNT Digital Library

【 摘 要 】

This note discusses the estimation of systematic uncertainties and their incorporation into upper limit calculations. Two different approaches to reducing systematics and their degrading impact on upper limits are introduced. An improved {chi}{sup 2} function is defined which is useful in comparing Poisson distributed data with models marginalized by systematic uncertainties. Also, a technique using profile likelihoods is introduced which provides a means of constraining the degrading impact of systematic uncertainties on limit calculations.