arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1208.0956hep-ex
收藏

寻找q rt(s)= 7 TeV pp碰撞中衰变为底夸克和顶夸克的W'玻色子

Search for a W' boson decaying to a bottom quark and a top quark in pp collisions at sqrt(s) = 7 TeV

CMS Collaboration

摘要:

结果是从一个W'玻色子搜索使用的数据集对应于5.0逆femtobarns的积分亮度收集在2011年期间的CMS实验在大型强子对撞机在pp碰撞在sqrt(s)=7 TeV。W'玻色子被建模为重W玻色子,但考虑了与费米子耦合的不同情况,包括费米子的左手和右手手征投影,以及两者的任意混合。在衰变通道W'到t b中进行搜索,导致具有单个轻子(e,μ)、丢失的横向能量和喷流的最终状态签名,其中至少一个被标记为b-喷流。当W'玻色子的质量低于1.85 TeV时,在95%的置信水平下,不考虑W'玻色子与费米子的耦合常数与W玻色子的耦合常数相同,但与右手而不是左手手征投影的耦合。对于第一次使用LHC数据,约束的W'规范耦合的一组左手和右手耦合组合已被放置。这些结果比以前公布的限值有了显著改进。

英文摘要:

Results are presented from a search for a W' boson using a dataset corresponding to 5.0 inverse femtobarns of integrated luminosity collected during 2011 by the CMS experiment at the LHC in pp collisions at sqrt(s)=7 TeV. The W' boson is modeled as a heavy W boson, but different scenarios for the couplings to fermions are considered, involving both left-handed and right-handed chiral projections of the fermions, as well as an arbitrary mixture of the two. The search is performed in the decay channel W' to t b, leading to a final state signature with a single lepton (e, mu), missing transverse energy, and jets, at least one of which is tagged as a b-jet. A W' boson that couples to fermions with the same coupling constant as the W, but to the right-handed rather than left-handed chiral projections, is excluded for masses below 1.85 TeV at the 95% confidence level. For the first time using LHC data, constraints on the W' gauge coupling for a set of left- and right-handed coupling combinations have been placed. These results represent a significant improvement over previously published limits.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑