The bulk RS KK-gluon at the LHC

被引：219

作者：

Lillie, Ben ^{[1
]}

Randall, Lisa

Wang, Lian-Tao

机构：

[1] Univ Chicago, 5640 S Ellis Ave, Chicago, IL 60637 USA

[2] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[3] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2007年 / 09期

基金：

美国国家科学基金会;

关键词：

beyond standard model; hadronic colliders; compactification and string models;

D O I：

10.1088/1126-6708/2007/09/074

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We study the possibility of discovering and measuring the properties of the lightest Kaluza-Klein excitation of the gluon in a Randall-Sundrum scenario where the Standard Model matter and gauge fields propagate in the bulk. The KK-gluon decays primarily into top quarks. We discuss how to use the t (t) over bar final states to discover and probe the properties of the KK-gluon. Identification of highly energetic tops is crucial for this analysis. We show that conventional identification methods relying on well separated decay products will not work or heavy resonances but suggest alternative methods for top identification for energetic tops. We find, assuming good efficiency for this identification, that resonances with masses less than 5 TeV can be discovered if the algorithm to identify high p(T) tops can reject the QCD background by a factor of 10. We also find that for similar or lighter masses the spin can be determined and for lighter masses the chirality of the coupling to t (t) over bar can be measured. Since the energetic top pair final state is a generic signature for a large class of new physics as the top quark presumably couples most strongly to the electroweak symmetry breaking sector, the methods we have outlined to study the properties of the KK-gluon should also be important in other scenarios.

引用

页数：23

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