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Joint Institute for Nuclear Research, Dubna, Russia.
Phys Rev Lett. 2008 Nov 21;101(21):211801. doi: 10.1103/PhysRevLett.101.211801. Epub 2008 Nov 19.
We present a measurement of the electron charge asymmetry in pp[over ]-->W+X-->enu+X events at a center of mass energy of 1.96 TeV using 0.75 fb(-1) of data collected with the D0 detector at the Fermilab Tevatron Collider. The asymmetry is measured as a function of the electron transverse momentum and pseudorapidity in the interval (-3.2, 3.2) and is compared with expectations from next-to-leading order calculations in perturbative quantum chromodynamics. These measurements will allow more accurate determinations of the proton parton distribution functions.
我们利用费米实验室Tevatron对撞机上D0探测器收集的0.75 fb⁻¹数据，给出了质心能量为1.96 TeV时pp→W⁺X→enu⁺X过程中电子电荷不对称性的测量结果。不对称性作为电子横向动量和在区间（-3.2，3.2）内的赝快度的函数进行测量，并与微扰量子色动力学中次领头阶计算的预期结果进行比较。这些测量将有助于更精确地确定质子部分子分布函数。
