Contact
Name
Roberto Castello

Position
Former member
Member from October 2011 to April 2015
Projects
Research directions:
Phenomenology of elementary particles
Data analysis in HEP experiments
Detector commissioning, operation and data processing

Experiments and collaborations:
CMS

Active projects
CMS Tracker commissioning and performance assessment
Florian Bury, Pieter David, Christophe Delaere, Martin Delcourt, Jessica Prisciandaro

The CMS silicon strip tracker is the largest device of its type ever built. There are 24244 single-sided micro-strip sensors covering an active area of 198m2.
Physics performance of the detector are being constantly assessed and optimized as new data comes.
Members of UCL are playing a major role in the understanding of the silicon strip tracker and in the maintenance and development of the local reconstruction code.

External collaborators: CMS tracker collaboration.
Search for Higgs boson(s) in CMS at the LHC in the llbb topology
Agni Bethani, Florian Bury, Jérôme de Favereau, Christophe Delaere, Khawla Jaffel, Vincent Lemaitre, Sébastien Wertz

Search for Higgs boson(s) within the Standard Model and beyond and also withing a minimal extension of the scalar sector (2HDM).

The final state under study is a Z decaying into a lepton pair associated with two b-jets. This topology is sensitive to a light SM Higgs via the associate ZH production, as well as a middle mass range SM Higgs boson via the inclusive Higgs production followed by its decay into ZZ with one Z decaying into a lepton pair and the other into bbar.

It is also very sensitive to the production of a non standard heavy Higgs boson decaying into Z plus A (pseudo scalar Higgs boson).

Similar selection (but outside of the Z window) is also sensitive to H->aa->llbb, with "a" a generic light scalar.

External collaborators: CMS collaboration.

Non-active projects
Publications in CP3
All my publications on Inspire

Number of publications as CP3 member: 22 Download BibTeX

Last 5 publications

2016

CP3-16-18: Search for Neutral Resonances Decaying into a Z Boson and a Pair of b Jets or Tau Leptons
CMS collaboration

[Abstract] [PDF] [Journal] [Dial] [Full text]
Published in Phys. Lett. B 759 (2016) 369
Refereed paper. April 28.
CP3-16-16: Summary results of high mass BSM Higgs searches using CMS run-I data
CMS Collaboration

[Full text]
CMS Physics Analysis Summary CMS-PAS-HIG-16-007,
Public experimental note. April 22.

2015

CP3-15-43: Search for H/A decaying into Z and A/H, with Z-->ll and A/H-->bb or A/H-->tau tau
CMS Collaboration

[Full text]
CMS-PAS-HIG-15-001
Public experimental note. December 1.

2014

CP3-14-74: Generic search for a Two Higgs Doublet Model in the Z(ll)+bb final state
R. Castello, A. Caudron, C. Delaere, T.A. du Pree, A. Mertens

[Full text]
CMS AN-2014/029
Restricted access (CMS internal analysis note)
Private experimental note. November 24.
CP3-14-55: Associated production of heavy flavour final state and a vector boson and search for H->bb
Roberto Castello on behalf of CMS collaboration

[Dial] [Full text]
Contribution to proceedings. July 4.

More publications