Jet Energy Calibration And Triple Differential Inclusive Cross Section Measurements With Z Jet Events At 13 Tev Recorded By The Cms Detector
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Jet Energy Calibration And Triple Differential Inclusive Cross Section Measurements With Z Jet Events At 13 Tev Recorded By The Cms Detector
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Author : Thomas Berger
language : en
Publisher:
Release Date : 2019
Jet Energy Calibration And Triple Differential Inclusive Cross Section Measurements With Z Jet Events At 13 Tev Recorded By The Cms Detector written by Thomas Berger and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with Calibration categories.
Measurement Of The Differential Cross Section For The Photon Jets And Z Jets Events With The Cms Detector At The Center Of Mass Energy Of 13 Tev
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Author : Nada Barakat
language : en
Publisher:
Release Date : 2019
Measurement Of The Differential Cross Section For The Photon Jets And Z Jets Events With The Cms Detector At The Center Of Mass Energy Of 13 Tev written by Nada Barakat and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with categories.
Measurement Of Triple Differential Z Jet Cross Sections With The Cms Detector At 13 Tev And Modelling Of Large Scale Distributed
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Author : Maximilian Horzela
language : en
Publisher:
Release Date : 2023*
Measurement Of Triple Differential Z Jet Cross Sections With The Cms Detector At 13 Tev And Modelling Of Large Scale Distributed written by Maximilian Horzela and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023* with categories.
Measurements Of Jet Multiplicity And Differential Production Cross Sections Of Z Jets Events In Proton Proton Collisions At U221a S
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Author :
language : en
Publisher:
Release Date : 2015
Measurements Of Jet Multiplicity And Differential Production Cross Sections Of Z Jets Events In Proton Proton Collisions At U221a S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
Measurements of differential cross sections are presented for the production of a Z boson and at least one hadronic jet in proton-proton collisions at √s = 7 TeV, recorded by the CMS detector, using a data sample corresponding to an integrated luminosity of 4.9 inverse femtobarns. The jet multiplicity distribution is measured for up to six jets. The differential cross sections are measured as a function of jet transverse momentum and pseudorapidity for the four highest transverse momentum jets. The distribution of the scalar sum of jet transverse momenta is also measured as a function of the jet multiplicity. The measurements are compared with theoretical predictions at leading and next-to-leading order in perturbative QCD.
Measurement Of The Inclusive 3 Jet Production Differential Cross Section In Proton Proton Collisions At 7 Tev And Determination Of The Strong Coupling Constant In The Tev Range
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Author :
language : en
Publisher:
Release Date : 2015
Measurement Of The Inclusive 3 Jet Production Differential Cross Section In Proton Proton Collisions At 7 Tev And Determination Of The Strong Coupling Constant In The Tev Range written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
This paper presents a measurement of the inclusive 3-jet production differential cross section at a proton-proton centre-of-mass energy of 7 TeV using data corresponding to an integrated luminosity of 5 fb$^{-1}$ collected with the CMS detector. The analysis is based on the three jets with the highest transverse momenta. The cross section is measured as a function of the invariant mass of the three jets in a range of 445-3270 GeV and in two bins of the maximum rapidity of the jets up to a value of 2. A comparison between the measurement and the prediction from perturbative QCD at next-to-leading order is performed. Within uncertainties, data and theory are in agreement. The sensitivity of the observable to parameters of the theory such as the parton distribution functions of the proton and the strong coupling constant $\alpha_S$ is studied. A fit to all data points with 3-jet masses larger than 664 GeV gives a value of the strong coupling constant of $\alpha_S(M_\mathrm{Z})$ = 0.1171 $\pm$ 0.0013 (exp) $^{+0.0073}_{-0.0047}$ (theo).
Measurement Of Differential Production Cross Sections For A Z Boson In Association With B Jets In 7 Tev Proton Proton Collisions With The Atlas Detector
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Author :
language : en
Publisher:
Release Date : 2014
Measurement Of Differential Production Cross Sections For A Z Boson In Association With B Jets In 7 Tev Proton Proton Collisions With The Atlas Detector written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.
We report measurements of differential production cross-sections of a Z boson in association with b-jets in pp collisions at √ s = 7 TeV. The data analysed correspond to an integrated luminosity of 4.6 fb-1 recorded with the ATLAS detector at the Large Hadron Collider. Particle-level cross-sections are determined for events with a Z boson decaying into an electron or muon pair, and containing b-jets. For events with at least one b-jet, the cross-section is presented as a function of the Z boson transverse momentum and rapidity, together with the inclusive b-jet cross-section as a function of b-jet transverse momentum, rapidity and angular separations between the b-jet and the Z boson. For events with at least two b-jets, the cross-section is determined as a function of the invariant mass and angular separation of the two highest transverse momentum b-jets, and as a function of the Z boson transverse momentum and rapidity. Lastly, results are compared to leading-order and next-to-leading-order perturbative QCD calculations.
Z Jets Cross Section Ratio Measurements
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Author :
language : en
Publisher:
Release Date : 2007
Z Jets Cross Section Ratio Measurements written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
We present a study of events with Z bosons and jets produced at the Fermilab Tevatron Collider in p{bar p} collisions at a center of mass energy of 1.96 TeV. The data sample consists of nearly 14,000 Z/[gamma]* 2!ee− candidates corresponding to the integrated luminosity of 340 pb−1 collected using the D0 detector. Ratios of the Z/[gamma]* + d"n jet cross sections to the total inclusive Z/[gamma]* cross section have been measured for n = 1 to 4 jet events. Our measurements are found to be in good agreement with a next-to-leading order QCD calculation and with a tree-level QCD prediction with parton shower simulation and hadronization.
Measurements Of Differential Z Gamma Jet X Cross Sections With The D0 Detector
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Author :
language : en
Publisher:
Release Date : 2009
Measurements Of Differential Z Gamma Jet X Cross Sections With The D0 Detector written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
We present measurements of differential cross sections in inclusive Z/[gamma]* plus jet production in a data sample of 1 fb−1 collected with the D0 detector in proton antiproton collisions at √s = 1.96 TeV. Measured variables include the Z/[gamma]* transverse momentum (p{sub T}{sup Z}) and rapidity (y{sup Z}), the leading jet transverse momentum (p{sub T}{sup jet}) and rapidity (y{sup jet}), as well as various angles of the Z+jet system. We compare the results to different Monte Carlo event generators and next-to-leading order perturbative QCD (NLO pQCD) predictions, with non-perturbative corrections applied.
Jet Calibration Cross Section Measurements And New Physics Searches With The Atlas Experiment Within The Run 2 Data
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Author : Robert Hankache
language : en
Publisher:
Release Date : 2019
Jet Calibration Cross Section Measurements And New Physics Searches With The Atlas Experiment Within The Run 2 Data written by Robert Hankache and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with categories.
The Standard Model is the current theory used to describe the elementary particles and their fundamental interactions (except the gravity). My PhD within the ATLAS experiment put this model under test using objects called jets, to study final state particles that interact through the strong force. First, I contributed to a method of jet calibration aiming at calibrating the energy scale of jets in the forward region of the detector with respect to central region. I improved the calibration by making it faster and more precise. Next, I worked on a search analysis of new physics using events with two jets. The Standard Model predicts a smooth distribution of the invariant mass of di-jets, hence we search for a bump which could come from a new particle. Since no significant bump is found, we put limits on signals as predicted by Beyond Standard Model theories and on model-independent signals. Last, I developed a new physics analysis measuring the leading (highest in transverse momentum) jet differential cross-section as a function of transverse momentum and rapidity. The challenge was to factorize the detector effects (resolution and acceptance) from the observable, which I did using a new unfolding technique. I also worked on the theoretical predictions calculation which was very challenging to perform and needed the implementation of special regularizations. The measurement and the predictions are then compared and tensions are observed due to the difficulties of theoretical predictions calculation.
Measurements Of Differential Cross Sections Of Z Gamma Jets X Events In Proton Anti Proton Collisions At S
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Author :
language : en
Publisher:
Release Date : 2009
Measurements Of Differential Cross Sections Of Z Gamma Jets X Events In Proton Anti Proton Collisions At S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
We present cross section measurements for Z/?* + jets + X production, differential in the transverse momenta of the three leading jets. The data sample was collected with the D0 detector at the Fermilab Tevatron p{bar p} collider at a center-of-mass energy of 1.96 TeV and corresponds to an integrated luminosity of 1 fb−1. Leading and next-to-leading order perturbative QCD predictions are compared with the measurements, and agreement is found within the theoretical and experimental uncertainties. We also make comparisons with the predictions of four event generators. Two parton-shower-based generators show significant shape and normalization differences with respect to the data. In contrast, two generators combining tree-level matrix elements with a parton shower give a reasonable description of the shapes observed in data, but the predicted normalizations show significant differences with respect to the data, reflecting large scale uncertainties. For specific choices of scales, the normalizations for either generator can be made to agree with the measurements.