Contact
Name
Khawla Jaffel

Position
PhD student

Email
khawla.jaffel@uclouvain.be

Address
Centre for Cosmology, Particle Physics and Phenomenology - CP3
Université catholique de Louvain
2, Chemin du Cyclotron - Box L7.01.05
B-1348 Louvain-la-Neuve
Belgium

Phone
+32 10 473263

Office
E.259

Personal homepage
https://khawlajaffel.wixsite.com/kjaffel/

UCL member card
http://www.uclouvain.be/khawla.jaffel
Projects
Research directions:
Data analysis in HEP, astroparticle and GW experiments
Detector commissioning, operation and data processing
Research and development of new detectors

Experiments and collaborations:
CMS

Active projects
Search for Higgs boson(s) in CMS at the LHC in the llbb topology
Jérôme de Favereau, Christophe Delaere, Khawla Jaffel, Vincent Lemaitre

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.
Study and optimization of b-tagging performances in CMS
Christophe Delaere, Khawla Jaffel

We are involved in the activities of the btag POG (performance object group) of CMS, in release and data validation and purity measurement. We are also interested in btagging in special cases like for colinear b-jets. Furthermore, we are involved in the re-optimization and improvement of the Combined Secondary Vertex (CSV) tagger for the 2012 analyses.

External collaborators: Strasbourg CMS group, CMS collaboration.
The CMS silicon strip tracker upgrade
Eduardo Cortina Gil, Jérôme de Favereau, Christophe Delaere, Pavel Demin, Suat Donertas, Khawla Jaffel, Sandhya Jain, Vincent Lemaitre

Development of the "phase II" upgrade for the CMS silicon strip stracker.

More precisely, we are involved in the development of the uTCA-based DAQ system and in the test/validation of the first prototype modules. We take active part to the various test-beam campaigns (CERN, DESY, ...)

This activity will potentially make use of the cyclotron of UCL, the probe stations and the SYCOC setup (SYstem de mesure de COllection de Charge) to test the response to laser light, radioactive sources and beams.

The final goal is to take a leading role in the construction of part of the CMS Phase-II tracker.

External collaborators: CRC and CMS collaboration.
Publications in IRMP
All my publications on Inspire

Number of publications as IRMP member: 2

2022

CP3-22-38: Strategies and performance of the CMS silicon tracker alignment during LHC Run~2
Tumasyan, Armen and others

[Abstract] [PDF] [Local file] [Journal] [Dial] [Full text]
Published in Nucl. Instrum. Meth. A
Refereed paper. August 12.
CP3-22-30: Searches for an extended Higgs boson sector at CMS
Khawla Jaffel for the CMS Collaboration

[Local file] [Full text]
Contribution to proceedings. April 20.