List of previous students

Nicola Orlando
Faten Hariri
Emma Kuwertz
Spyridon Argyropoulo
Sabrina Sacerdoti
Simone Amoroso
Jesper Roy Christiansen
Nathan Hartland
Christian Roehr
Benjamin Watt
Philip Ilten
Nishita Desai
Sercan Sen
Miroslav Myska
Sudha Ahuja
Holger Schulz
Avi Gershan
Aleksander Kusina
Magdalena Slawinska
Flavia Dias
Kenneth Wraight
Irais Bautista Guzman
Sparsh Navin
Paolo Francavilla
Riccardo Di Sipio
Seyi Latunde-Dada
Devdatta Majumder
Martijn Gosselink
Christopher Bignamini
Marek Schönherr
Michal Deak
Noam Hod
Florian Bechtel
Jonathan Ferland
Manuel Bähr
Alexander Flossdorf
Piergiulio Lenzi

I am a Ph.D. student at the University of Delhi, Delhi, India. I collaborate on the CMS experiment at CERN. My research interest lies in the study of Direct Photon physics, a study which can be performed even with current low luminosity LHC data. The study is important for validating pQCD, helps in constraining parton distribution functions(PDFs) of the proton, is crucial for jet energy resolution studies, and for search of intermediate mass SM Higgs Boson decaying into diphoton. I had applied for the MCNet program with an aim to understand Monte Carlo generators and the theory behind them. We, the experimental physicists, are mostly the end users of MC generators and use it for comparison with data. At the present high energy colliders such as LHC, production and identification of multi-jet final state events is very high due to large available phase space and large acceptance of the detectors. These hadronic multi-jet states form searching grounds for many new physics and also form a source of background to many SM processes. Thus, an accurate simulation of the multi-jet final states becomes very important. For this, both the calculations for the hard process and further development of the hard partons into jets of hadrons should be described very well. Use of matrix element(ME) calculations give an exact description of the hard process and a pure parton shower(PS) approach gives a better description of the soft and collinear region of phase space. Combination of both approaches could give a better description of final state over the full phase space but this could lead to double counting of events as well as dead regions in the phase space. The ME-PS merging schemes try to address these issues. The main idea behind the ME-PS merging schemes is to divide the phase space into two regions, one where matrix element calculations are used for describing the hard process and other where parton shower is used for soft and collinear emissions and thus providing complete inclusive samples. The scale at which the separation between the two regions is defined, is called the merging scale. For our study, we are using the CKKW merging approach inside Herwig++ Monte Carlo generator using the QCD process γ+jets. The goal of my MCNet project was to study the CKKW approach in Herwig++ using the process γ+jets and validate it against other Monte Carlo generators and data. We got the CKKW framework for γ+jets working inside Herwig++ and then studied the effect of varying the merging scale on the process γ+jets. This gave me a better understanding of the physics process under study and also of the Monte Carlo generators used.