Introduction

The excited bottom quark(b*) is produced by a gluon interact with a bottom quark, and decayed to tW signature. This b* could be left-handed, right-handed or vector-like.The experimental search at ATLAS is published in Phys. Lett. B 721 (2013) 171-189(http://arxiv.org/abs/1301.1583). This channel could be hunted in the dilepton channel, lepton +jets channel and multijet channel (in the last two case using substructure techniques). This analysis is belong to B2G resonance sub-group. The B2G ongoing analysis is at here.

(wo)Man power

IHEP Beijing group: Guoming Chen, Sarmad Masood Shaheen(Ph.D), Xiangwei Meng, Huaqiao Zhang, Shihai Zhu(Post-Doc).

PKU Beijing Group: Qiang Li, Mengmeng Wang(To be confirmed)

NTU Group: Rachel Bartek

VUB Group: Freya Blekman

Johns Hopkins University (US): Kevin Nash, Petar Maksimovic, Marc Osherson

Documentation and publication:

CMS: B2G-14-005

Meetings and presentations

27 Sept. 2013 B2G resonance meeting: by Huaqiao

Signal Generation

The signal is modeled with MadGaph 5. An example generation is at here. Official production is under-going (30, Aug 2013)

Data and MC samples (2012 full 8 TeV 19.8 fb-1 data)

B2GTopLikeBSM53X

More details, please check related B2G twiki and B2G Resonance twiki.

Lepton + Jets channel

non boosted analysis

lepton + boost top analysis

lepton + boost W analysis

Dilepton channel

Full hadronic channel

Limit Setting

Tool kit of Theta: http://www-ekp.physik.uni-karlsruhe.de/~ott/theta/theta-auto/