Search for a W' Boson Decaying to a Muon and a Neutrino in Pp Collisions at Sqrt(s)
Title | Search for a W' Boson Decaying to a Muon and a Neutrino in Pp Collisions at Sqrt(s) PDF eBook |
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Pages | |
Release | 2011 |
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A new heavy gauge boson, W', decaying to a muon and a neutrino, is searched for in pp collisions at a centre-of-mass of 7 TeV. The data, collected with the CMS detector at the LHC, correspond to an integrated luminosity of 36 inverse picobarns. No significant excess of events above the standard model expectation is found in the transverse mass distribution of the muon-neutrino system. Masses below 1.40 TeV are excluded at the 95% confidence level for a sequential standard-model-like W'. The W' mass lower limit increases to 1.58 TeV when the present analysis is combined with the CMS result for the electron channel.
Search for a Heavy Charged Gauge Boson Decaying to a Muon and a Neutrino in 1 Fb−1 of Proton-proton Collisions at [square Root of S]
Title | Search for a Heavy Charged Gauge Boson Decaying to a Muon and a Neutrino in 1 Fb−1 of Proton-proton Collisions at [square Root of S] PDF eBook |
Author | Alaettin Serhan Mete |
Publisher | |
Pages | 117 |
Release | 2012 |
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Neutrinos in High Energy and Astroparticle Physics
Title | Neutrinos in High Energy and Astroparticle Physics PDF eBook |
Author | Jose Wagner Furtado Valle |
Publisher | John Wiley & Sons |
Pages | 450 |
Release | 2015-04-20 |
Genre | Science |
ISBN | 3527411976 |
This self-contained modern textbook provides a modern description of the Standard Model and its main extensions from the perspective of neutrino physics. In particular it includes a thorough discussion of the varieties of seesaw mechanism, with or without supersymmetry. It also discusses schemes where neutrino mass arises from lighter messengers, which might lie within reach of the world's largest particle accelerator, the Large Hadron Collider. Throughout the text, the book stresses the role of neutrinos due to the fact that neutrino properties may serve as a guide to the correct model of unification, hence for a deeper understanding of high energy physics, and because neutrinos play an important role in astroparticle physics and cosmology. Each chapter includes summaries and set of problems, as well as further reading.
Search for a Heavy Gauge Boson Decaying to a Charged Lepton and a Neutrino in 1 Fb-1 of Pp Collisions at [mml
Title | Search for a Heavy Gauge Boson Decaying to a Charged Lepton and a Neutrino in 1 Fb-1 of Pp Collisions at [mml PDF eBook |
Author | |
Publisher | |
Pages | 28 |
Release | 2011 |
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The ATLAS detector at the LHC is used to search for heavy charged gauge bosons (W'), decaying to a charged lepton (electron or muon) and a neutrino. Results are presented based on the analysis of pp collisions at a center-of-mass energy of 7 TeV corresponding to an integrated luminosity of 1.04 fb−1. No excess beyond Standard Model expectations is observed. A W' with Sequential Standard Model couplings is excluded at the 95% confidence level for masses up to 2.15 TeV.
Search for a Heavy Gauge Boson Decaying to a Charged Lepton and a Neutrino in 1 Fb-1 of pp Collisions at {u221A}s
Title | Search for a Heavy Gauge Boson Decaying to a Charged Lepton and a Neutrino in 1 Fb-1 of pp Collisions at {u221A}s PDF eBook |
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Pages | 19 |
Release | 2011 |
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The ATLAS detector at the LHC is used to search for heavy charged gauge bosons (W'), decaying to a charged lepton (electron or muon) and a neutrino. Results are presented based on the analysis of pp collisions at a center-of-mass energy of 7 TeV corresponding to an integrated luminosity of 1.04 fb−1. No excess beyond Standard Model expectations is observed. A W' with Sequential Standard Model couplings is excluded at the 95% confidence level for masses up to 2.15 TeV.
A Search for a Heavy Majorana Neutrino at ATLAS Using 4.7 Fb-1 of Pp Collisions at Sqrt(s)
Title | A Search for a Heavy Majorana Neutrino at ATLAS Using 4.7 Fb-1 of Pp Collisions at Sqrt(s) PDF eBook |
Author | John Leslie Almond |
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Pages | |
Release | 2013 |
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The discovery of neutrino oscillations provides evidence that the Standard Model neutrinos have mass. Many models generate the mass for the light neutrinos by postulating the existence of heavy neutrinos. This thesis presents the search for a heavy Majorana neutrino decaying into a W boson and a muon that was performed using the ATLAS detector at the LHC. The search is performed using final states with two same-sign muons, two or more high momentum jets and low missing transverse energy. The events are required to pass the ATLAS muon trigger and the improvements made in the muon trigger algorithms are also presented. The data used in this thesis were collected using pp collisions at sqrt(s) = 7 TeV in 2011 and correspond to an integrated luminosity of 4.7 fb-1. In the search no excess of events above the background prediction is observed and 95% confidence level upper limits are set on the cross section times branching ratio for the production of heavy Majorana neutrinos. Limits are set for heavy Majorana neutrinos with masses ranging from 100 to 300 GeV, in which the observed limits range between 28 to 3.4 fb. These are most stringent direct limits to date for heavy neutrino masses larger than 100 GeV.
Search for a Heavy Gauge Boson W' in the Final State with an Electron and Large Missing Transverse Energy in Pp Collisions at Sqrt(s)
Title | Search for a Heavy Gauge Boson W' in the Final State with an Electron and Large Missing Transverse Energy in Pp Collisions at Sqrt(s) PDF eBook |
Author | Darren Michael Puigh |
Publisher | |
Pages | 296 |
Release | 2012 |
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A search for a heavy gauge boson W has been conducted by the CMS experiment at the LHC in the decay channel with an electron and large transverse / energy imbalance, E T, using proton-proton collision data corresponding to an integrated luminosity of 36 pb[-]1 . No excess above standard model expectations / is seen in the transverse mass distribution of the electron-E T system. Assuming standard-model-like couplings and decay branching fractions, a W boson with a mass less than 1.32 TeV/c2 is excluded at the 95% confidence level.