ΔMW≤10 MeV/c2 at the LHC: a forlorn hope?

ΔMW≤10 MeV/c2 at the LHC: a forlorn hope?
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LHC 的 ΔMW≤10 MeV/c2:希望渺茫?

DOI:
10.1140/epjc/s10052-010-1417-0
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发表时间:
2010
期刊:
The European Physical Journal C
影响因子:
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通讯作者:
A. Siódmok
A. Siódmok
中科院分区:
--
文献类型:
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作者:
M. Krasny;F. Dydak;F. Fayette;W. Płaczek;A. Siódmok;A. Siódmok

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在大型强子对撞机上,以$\mathcal{O}$(10)MeV/c2的精度测量W质量是强制性的,也是困难的。在迄今为止提出的分析策略中,已经为Tevatron的质子-反质子碰撞提供了合理的捷径,但在LHC的质子-质子碰撞中却没有。问题的根源在于对质子部分子密度函数的认识不足。有人认为,为了达到10 MeV/c2的W质量的精度,需要更精确的质子的部分子密度函数,和LHC的具体分析策略应该被追求。就这两个问题提出了建议。
At the LHC, the measurement of the W mass with a precision of $\mathcal{O}$(10) MeV/c2 is both mandatory and difficult. In the analysis strategies proposed so far, shortcuts have been made that are justified for proton–antiproton collisions at the Tevatron, but not for proton–proton collisions at the LHC. The root of the problem lies in the inadequate knowledge of parton density functions of the proton. It is argued that in order to reach a 10 MeV/c2 precision for the W mass, more precise parton density functions of the proton are needed, and an LHC-specific analysis strategy ought to be pursued. Proposals are made on both issues.