利用大快度下的电子测量W玻色子质量。

Measurement of the W boson mass using electrons at large rapidities.

作者信息

Song XF, Sosebee M, Sotnikova N, Souza M, Stanton NR, Steinbruck G, Stephens RW, Stevenson ML, Stichelbaut F, Stoker D, Stolin V, Stoyanova DA, Strauss M, Streets K, Strovink M, Stutte L, Sznajder A, Tamburello P, Tarazi J, Tartaglia M, Thomas TL, Thompson J, Toback D, Trippe TG, Turcot AS, Tuts PM

机构信息

New York University, New York, New York 10003, USA.

出版信息

Phys Rev Lett. 2000 Jan 10;84(2):222-7. doi: 10.1103/PhysRevLett.84.222.

DOI:10.1103/PhysRevLett.84.222

PMID:11015877

Abstract

We report a measurement of the W boson mass based on an integrated luminosity of 82 pb(-1) from p&pmacr; collisions at sqrt[s] = 1.8 TeV recorded in 1994-1995 by the D0 detector at the Fermilab Tevatron. We identify W bosons by their decays to enu, where the electron is detected in the forward calorimeters. We extract the mass by fitting the transverse mass and the electron and neutrino transverse momentum spectra of 11 089 W boson candidates. We measure M(W) = 80.691+/-0.227 GeV. By combining this measurement with our previously published central calorimeter results from data taken in 1992-1993 and 1994-1995, we obtain M(W) = 80.482+/-0.091 GeV.

摘要

我们报告了基于费米实验室Tevatron的D0探测器在1994 - 1995年记录的质心能量(\sqrt{s}=1.8)TeV的(p\bar{p})对撞中82(pb^{-1})的积分亮度所进行的W玻色子质量测量。我们通过W玻色子衰变成(e\nu)来识别W玻色子，其中电子在前向量能器中被探测到。我们通过对11089个W玻色子候选事例的横向质量以及电子和中微子横向动量谱进行拟合来提取质量。我们测量得到(M(W)=80.691\pm0.227)GeV。通过将这个测量结果与我们之前发表的1992 - 1993年以及1994 - 1995年数据的中心量能器结果相结合，我们得到(M(W)=80.482\pm0.091)GeV。