Giuseppe Iacobucci Web Pages

 Searches for new physics in high mass di-jet systems

 

Since 2012, our group has been central in several ATLAS searches for heavy resonances decaying in two jets, which are the most direct probe of new physics at hadron colliders due to the enormous di-jet cross-section. 

The  analysis of the 2012 ATLAS data was split into a di-jet resonant search [PRD 91 (2015) 052007] and a di-jet angular search [PRL 114 (2015) 22, 221802], 

We gave a major contribution to two publications based on the 2015 dataset, [ATLAS-CONF-2015-042] and [PLB 754 (2016) 302-322]. We were involved in general performance and systematic uncertainty studies, trigger, fit stability and robustness, signal sensitivities, and managed the data format used by the full analysis group.

No significant excess was observed in either resonant or angular distributions, as shown in the figures below.

ATLAS-dijets-1.png(Left) The di-jet mass spectrum using the 2015 ATLAS dataset, showing no significant excess beyond the SM expectations.
(Right) The dijet angular variable χ = e|y1−y2|, where yi is the rapidity of the i-th leading jet, showing no significant excess beyond the SM expectations. 

 

Group contributors:

Caterina Doglioni, Steven Schramm, Francesco Guescini (thesis)

 

 

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Département de Physique Nucléaire et Corpusculaire | 2017 | Impressum.