Combination of the Searches for Pair-Produced Vectorlike Partners of the Third-Generation Quarks at s =13 TeV with the ATLAS Detector

doi:10.1103/PhysRevLett.121.211801

	Combination of the Searches for Pair-Produced Vectorlike Partners of the Third-Generation Quarks at s =13 TeV with the ATLAS Detector
	ATLAS Collaboration
刊名	PHYSICAL REVIEW LETTERS
	2018
卷号	121 期号:21 页码:211801
ISSN号	0031-9007
DOI	10.1103/PhysRevLett.121.211801
文献子类	Article
英文摘要	A combination of the searches for pair-produced vectorlike partners of the top and bottom quarks in various decay channels (T -> Zt/Wb/Ht, B -> Zb/Wt/Hb) is performed using 36.1 fb(-1) of pp collision data at root s = 13 TeV with the ATLAS detector at the Large Hadron Collider. The observed data are found to be in good agreement with the standard model background prediction in all individual searches. Therefore, combined 95% confidence-level upper limits are set on the production cross section for a range of vectorlike quark scenarios, significantly improving upon the reach of the individual searches. Model-independent limits are set assuming the vectorlike quarks decay to standard model particles. A singlet T is excluded for masses below 1.31 TeV and a singlet B is excluded for masses below 1.22 TeV. Assuming a weak isospin (T, B) doublet and vertical bar V-Tb vertical bar << vertical bar V-tB vertical bar, T and B masses below 1.37 TeV are excluded.
电子版国际标准刊号	1079-7114
WOS关键词	PARTON DISTRIBUTIONS ; SYMMETRY ; BREAKING ; DYNAMICS
WOS研究方向	Physics
语种	英语
WOS记录号	WOS:000451008600002
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/286935]
专题	高能物理研究所_实验物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	ATLAS Collaboration. Combination of the Searches for Pair-Produced Vectorlike Partners of the Third-Generation Quarks at s =13 TeV with the ATLAS Detector[J]. PHYSICAL REVIEW LETTERS,2018,121(21):211801.
APA	ATLAS Collaboration.(2018).Combination of the Searches for Pair-Produced Vectorlike Partners of the Third-Generation Quarks at s =13 TeV with the ATLAS Detector.PHYSICAL REVIEW LETTERS,121(21),211801.
MLA	ATLAS Collaboration."Combination of the Searches for Pair-Produced Vectorlike Partners of the Third-Generation Quarks at s =13 TeV with the ATLAS Detector".PHYSICAL REVIEW LETTERS 121.21(2018):211801.