Home | Contact | Sitemap | 中文 | CAS
Search: 
Home │  About Us │  Research │  People │  International Cooperation │  Education & Training │  Papers
  Seminar
Conference
Forum on FS
Colloquium
Seminar
Lunch Seminar
Coffee Time
Advanced Course
KITPC Activities
Other activities
  Location: Home >  Research Activities >  Seminar
Jet Substructure by Accident
2014-03-26     Text Size:  A

Institute of Theoretical Physics
Chinese Academy of Sciences
State Key Laboratory of Theoretical Physics

学术报告

Title
题目

Jet Substructure by Accident

 

Speaker
报告人

Dr. Timothy Cohen

SLAC National Accelerator Laboratory

Date
日期

2014-03-26 PM 15:00 Wednesday

Venue
地点

Conference Hall 322, ITP/理论物理所322报告厅

Abstract
摘要

We propose a new search strategy for high-multiplicity hadronic final states. When new particles are produced at threshold, the distribution of their decay products is approximately isotropic. If there are many partons in the final state, it is likely that several will be clustered into the same large-radius jet. The resulting jet exhibits substructure, even though the parent states are not boosted. This ³accidental² substructure is a powerful discriminant against background because it is more pronounced for high-multiplicity signals than for QCD multijets. We demonstrate how to take advantage of accidental substructure to reduce backgrounds without relying on the presence of missing energy. As an example, we present the expected limits for several R-parity violating gluino decay topologies. This approach also is amenable to a novel method for determining QCD predictions using templates – probability distribution functions for jet substructure properties as a function of kinematic inputs. Templates can be extracted from a control region and then used to compute background distributions in the signal region. Using Monte Carlo, we will demonstrate the procedure with two case studies and show that the template approach effectively models the relevant QCD background. This work strongly motivates the application of these techniques to LHC data.

Contact
所内联系人

舒菁

 

  Appendix:
       Address: No. 55 Zhong Guan Cun East Road, Haidian District, Beijing 100190, P. R. China
Copyright ? Institute of Theoretical Physics, Chinese Academy of Sciences, All Rights Reserved