Low Q2 Structure Function Measurements
Gregorio Bernardi
Abstract
New Results on the measurement of the proton structure function F2(x,Q2) are reported for momentum transfers squared Q2 >= 1.5 GeV2 and Bjorken x >= 3.5 10-5 using data collected by the HERA experiments H1 and ZEUS in 1994. F2 increases significantly with decreasing x, even in the lowest reachable Q2 region. The data are well described by a Next to Leading Order QCD fit, and support within the present precision that the rise at low x within this Q2 range is generated via the DGLAP evolution equations. A comparison with models based on pomeron exchange is also presented. The gluon density is extracted and observed to rise at low x.
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