Performance Of Jet Missing Transverse Energy And Tau Reconstruction With Atlas In P P Collisions At Sqrt S

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Performance Of Jet Missing Transverse Energy And Tau Reconstruction With Atlas In P P Collisions At Sqrt S

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Author :
language : en
Publisher:
Release Date : 2013

Performance Of Jet Missing Transverse Energy And Tau Reconstruction With Atlas In P P Collisions At Sqrt 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 2013 with categories.

Heavy Neutral Particle Decays To Tau Pairs

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Author : Michail Bachtis
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-12-13

Heavy Neutral Particle Decays To Tau Pairs written by Michail Bachtis and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-12-13 with Science categories.

The work presented in this thesis spans a wide range of experimental particle physics subjects, starting from level-1 trigger electronics to the final results of the search for Higgs boson decay and to tau lepton pairs. The thesis describes an innovative reconstruction algorithm for tau decays and details how it was instrumental in providing a measurement of Z decay to tau lepton pairs. The reliability of the analysis is fully established by this measurement before the Higgs boson decay to tau lepton pairs is considered. The work described here continues to serve as a model for analysing CMS Higgs to tau leptons measurements.

Atlas B Jet Identification Performance And Efficiency Measurement With Tt Over Bar Events In Pp Collisions At Square Root S

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Author : ATLAS Collaboration CERN
language : en
Publisher:
Release Date : 2019

Atlas B Jet Identification Performance And Efficiency Measurement With Tt Over Bar Events In Pp Collisions At Square Root S written by ATLAS Collaboration CERN 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.

Abstract: The algorithms used by the ATLAS Collaboration during Run 2 of the Large Hadron Collider to identify jets containing b-hadrons are presented. The performance of the algorithms is evaluated in the simulation and the efficiency with which these algorithms identify jets containing b-hadrons is measured in collision data. The measurement uses a likelihood-based method in a sample highly enriched in tt ̄ events. The topology of the t→Wb decays is exploited to simultaneously measure both the jet flavour composition of the sample and the efficiency in a transverse momentum range from 20 to 600 GeV. The efficiency measurement is subsequently compared with that predicted by the simulation. The data used in this measurement, corresponding to a total integrated luminosity of 80.5 fb−1, were collected in proton-proton collisions during the years 2015-2017 at a centre-of-mass energy s√= 13 TeV. By simultaneously extracting both the efficiency and jet flavour composition, this measurement significantly improves the precision compared to previous results, with uncertainties ranging from 1 to 8% depending on the jet transverse momentum

The Development Of Missing Transverse Momentum Reconstruction With The Atlas Detector Using The Pufit Algorithm In Pp Collisions At 13 Tev

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Author : Zhelun Li
language : en
Publisher:
Release Date : 2019

The Development Of Missing Transverse Momentum Reconstruction With The Atlas Detector Using The Pufit Algorithm In Pp Collisions At 13 Tev written by Zhelun Li 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.

Many interesting physical processes produce non-interacting particles that could only be measured using the missing transverse momentum. The increase of the proton beam intensity in the Large Hadron Collider (LHC) provides sensitivity to rare physics processes while inevitably increasing the number of simultaneous proton collisions in each event. The missing transverse momentum (MET) is a variable of great interest, defined as the negative sum of the transverse momentum of all visible particles. The precision of the MET determination deteriorates as the complexity of the recorded data escalates. Given the current complexity of data analysis, a new algorithm is developed to effectively determine the MET. Several well-understood physics processes were used to test the effectiveness of the newly designed algorithm. The performance of the new algorithm is also compared to that of the standard algorithm used in the ATLAS experiment.

Studies Into Tau Reconstruction Missing Transverse Energy And Photon Induced Processes With The Atlas Detector At The Lhc

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Author : Robindra P. Prabhu
language : en
Publisher:
Release Date : 2011

Studies Into Tau Reconstruction Missing Transverse Energy And Photon Induced Processes With The Atlas Detector At The Lhc written by Robindra P. Prabhu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.

Reconstruction Of Hadronic Decay Products Of Tau Leptons With The Atlas Experiment

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Author :
language : en
Publisher:
Release Date : 2016

Reconstruction Of Hadronic Decay Products Of Tau Leptons With The Atlas Experiment written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.

This document presents a new method of reconstructing the individual charged and neutral hadrons in tau decays with the ATLAS detector. The reconstructed hadrons are used to classify the decay mode and to calculate the visible four-momentum of reconstructed tau candidates, significantly improving the resolution with respect to the calibration in the existing tau reconstruction. The performance of the reconstruction algorithm is optimised and evaluated using simulation and validated using samples of Z → [tau][tau] and Z(→ [mu][mu])+jets events selected from proton-proton collisions at a centre-of-mass energy √s = 8 TeV, corresponding to an integrated luminosity of 5 fb-1.

Measurement Of The C Jet Mistagging Efficiency In Tt Over Bar Events Using Pp Collision Data At Square Root S

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Author : [Study Group] ATLAS Collaboration CERN
language : en
Publisher:
Release Date : 2022

Measurement Of The C Jet Mistagging Efficiency In Tt Over Bar Events Using Pp Collision Data At Square Root S written by [Study Group] ATLAS Collaboration CERN and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022 with categories.

Abstract: A technique is presented to measure the efficiency with which c-jets are mistagged as b-jets (mistagging efficiency) using tt ̄ events, where one of the W bosons decays into an electron or muon and a neutrino and the other decays into a quark-antiquark pair. The measurement utilises the relatively large and known W→cs branching ratio, which allows a measurement to be made in an inclusive c-jet sample. The data sample used was collected by the ATLAS detector at s√=13 TeV and corresponds to an integrated luminosity of 139 fb−1. Events are reconstructed using a kinematic likelihood technique which selects the mapping between jets and tt ̄ decay products that yields the highest likelihood value. The distribution of the b-tagging discriminant for jets from the hadronic W decays in data is compared with that in simulation to extract the mistagging efficiency as a function of jet transverse momentum. The total uncertainties are in the range 3-17%. The measurements generally agree with those in simulation but there are some differences in the region corresponding to the most stringent b-jet tagging requirement

Measurements Of The Total Transverse Energy In Pp Collisions And A New Technique For Model Independent Missing Transverse Energy Searches With Atlas

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Author : Peter Alexander Wijeratne
language : en
Publisher:
Release Date : 2013

Measurements Of The Total Transverse Energy In Pp Collisions And A New Technique For Model Independent Missing Transverse Energy Searches With Atlas written by Peter Alexander Wijeratne and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.

Hunt For New Phenomena Using Large Jet Multiplicities And Missing Transverse Momentum With Atlas In 4 7 Fb 1 Of Sqrt S

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Author :
language : en
Publisher:
Release Date : 2014

Hunt For New Phenomena Using Large Jet Multiplicities And Missing Transverse Momentum With Atlas In 4 7 Fb 1 Of Sqrt 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 2014 with categories.

Identification Of Hadronic Tau Decays Using The Tau Lepton Flight Path And Reconstruction And Identification Of Jets With A Low Transverse Energy At Intermediate Luminosities With An Application To The Search For The Higgs Boson In Vector Boson Fusion With The Atlas Experiment At The Lhc

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Author : Christoph Ruwiedel
language : en
Publisher:
Release Date : 2010

Identification Of Hadronic Tau Decays Using The Tau Lepton Flight Path And Reconstruction And Identification Of Jets With A Low Transverse Energy At Intermediate Luminosities With An Application To The Search For The Higgs Boson In Vector Boson Fusion With The Atlas Experiment At The Lhc written by Christoph Ruwiedel and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.