Search For Dark Matter Extra Dimensions And Unparticles In Monojet Events In Proton Proton Collisions At Sqrts
Download Search For Dark Matter Extra Dimensions And Unparticles In Monojet Events In Proton Proton Collisions At Sqrts full books in PDF, epub, and Kindle. Read online free Search For Dark Matter Extra Dimensions And Unparticles In Monojet Events In Proton Proton Collisions At Sqrts ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads.
Author |
: |
Publisher |
: |
Total Pages |
: 270 |
Release |
: 2015 |
ISBN-10 |
: OCLC:925452974 |
ISBN-13 |
: |
Rating |
: 4/5 (74 Downloads) |
Synopsis Search for Dark Matter, Extra Dimensions, and Unparticles in Monojet Events in Proton-proton Collisions at $\sqrt{s}$ by :
Results are presented from a search for particle dark matter (DM), extra dimensions, and unparticles using events containing a jet and an imbalance in transverse momentum. The data were collected by the CMS detector in proton-proton collisions at the LHC and correspond to an integrated luminosity of 19.7 fb$^{-1}$ at a centre-of-mass energy of 8 TeV. The number of observed events is found to be consistent with the standard model prediction. Limits are placed on the DM-nucleon scattering cross section as a function of the DM particle mass for spin-dependent and spin-independent interactions. Limits are also placed on the scale parameter $M_\mathrm{D}$ in the ADD model of large extra dimensions, and on the unparticle model parameter $\Lambda_\mathrm{U}$. The constraints on ADD models and unparticles are the most stringent limits in this channel and those on the DM-nucleon scattering cross section are an improvement over previous collider results.
Author |
: Ruth Pöttgen |
Publisher |
: Springer |
Total Pages |
: 325 |
Release |
: 2016-06-29 |
ISBN-10 |
: 9783319410456 |
ISBN-13 |
: 3319410458 |
Rating |
: 4/5 (56 Downloads) |
Synopsis Search for Dark Matter with ATLAS by : Ruth Pöttgen
This thesis describes in detail a search for weakly interacting massive particles as possible dark matter candidates, making use of so-called mono-jet events. It includes a detailed description of the run-1 system, important operational challenges, and the upgrade for run-2. The nature of dark matter, which accounts for roughly 25% of the energy-matter content of the universe, is one of the biggest open questions in fundamental science. The analysis is based on the full set of proton-proton collisions collected by the ATLAS experiment at the Large Hadron Collider at √s = 8 TeV. Special attention is given to the experimental challenges and analysis techniques, as well as the overall scientific context beyond particle physics. The results complement those of non-collider experiments and yield some of the strongest exclusion bounds on parameters of dark matter models by the end of the Large Hadron Collider run-1. Details of the upgrade of the ATLAS Central Trigger for run-2 are also included.
Author |
: |
Publisher |
: |
Total Pages |
: |
Release |
: 2017 |
ISBN-10 |
: OCLC:971475352 |
ISBN-13 |
: |
Rating |
: 4/5 (52 Downloads) |
Synopsis Search for Dark Matter and Unparticles in Events with a Z Boson and Missing Transverse Momentum in Proton-proton Collisions at Sqrt(s) by :
A search for dark matter and unparticle production at the LHC has been performed using events containing two charged leptons (electrons or muons), consistent with the decay of a Z boson, and large missing transverse momentum. This study is based on data collected with the CMS detector in 2015, corresponding to an integrated luminosity of 2.3 inverse femtobarns of proton-proton collisions at the LHC, at a center-of-mass energy of 13 TeV. No excess over the standard model expectation is observed. Compared to previous searches in this topology, which exclusively relied on effective field theories, the results are interpreted in terms of a simplified model of dark matter production for both vector and axial vector couplings between a mediator and dark matter particles. The first study of this class of models using CMS data at sqrt(s)=13 TeV is presented. Additionally, effective field theories of dark matter and unparticle production are used to interpret the data.
Author |
: |
Publisher |
: |
Total Pages |
: |
Release |
: 2016 |
ISBN-10 |
: OCLC:946822557 |
ISBN-13 |
: |
Rating |
: 4/5 (57 Downloads) |
Synopsis Search for Dark Matter and Unparticles Produced in Association with a Z Boson in Proton-proton Collisions at Sqrt(s) by :
A search for evidence of particle dark matter (DM) and unparticle production at the LHC has been performed using events containing two charged leptons, consistent with the decay of a Z boson, and large missing transverse momentum. This study is based on data collected with the CMS detector corresponding to an integrated luminosity of 19.7 inverse femtobarns of pp collisions at the LHC at a center-of-mass energy of 8 TeV. No significant excess of events is observed above the number expected from the standard model contributions. The results are interpreted in terms of 90% confidence level limits on the DM-nucleon scattering cross section, as a function of the DM particle mass, for both spin-dependent and spin-independent scenarios. Limits are set on the effective cutoff scale Lambda, and on the annihilation rate for DM particles, assuming that their branching fraction to quarks is 100%. Additionally, the most stringent 95% confidence level limits to date on the unparticle model parameters are obtained.
Author |
: |
Publisher |
: |
Total Pages |
: 20 |
Release |
: 2013 |
ISBN-10 |
: OCLC:951616220 |
ISBN-13 |
: |
Rating |
: 4/5 (20 Downloads) |
Synopsis Search for Extra Dimensions Using Diphoton Events in 7 TeV Proton-Proton Collisions with the ATLAS Detector by :
Author |
: |
Publisher |
: |
Total Pages |
: |
Release |
: 2016 |
ISBN-10 |
: OCLC:958047429 |
ISBN-13 |
: |
Rating |
: 4/5 (29 Downloads) |
Synopsis Search for Extra Dimensions in Diphoton Events from Proton-proton Collisions at √s by :
Author |
: |
Publisher |
: |
Total Pages |
: 7 |
Release |
: 2013 |
ISBN-10 |
: OCLC:1065672347 |
ISBN-13 |
: |
Rating |
: 4/5 (47 Downloads) |
Synopsis A Search for Dark Matter in Events with One Jet and Missing Transverse Energy in Pp-bar Collisions at Sqrt(s) by :
Author |
: Ruth Pöttgen |
Publisher |
: |
Total Pages |
: 0 |
Release |
: 2014 |
ISBN-10 |
: OCLC:908999420 |
ISBN-13 |
: |
Rating |
: 4/5 (20 Downloads) |
Synopsis Search for Dark Matter in Events with a Highly Energetic Jet and Missing Transverse Momentum in Proton-proton Collisions at Root Out S by : Ruth Pöttgen
Author |
: Olof Lundberg |
Publisher |
: |
Total Pages |
: 229 |
Release |
: 2016 |
ISBN-10 |
: 9176494292 |
ISBN-13 |
: 9789176494295 |
Rating |
: 4/5 (92 Downloads) |
Synopsis Searches for Dark Matter and Large Extra Dimensions in Monojet Final States with the ATLAS Experiment by : Olof Lundberg
Author |
: |
Publisher |
: |
Total Pages |
: 7 |
Release |
: 2012 |
ISBN-10 |
: OCLC:1065797440 |
ISBN-13 |
: |
Rating |
: 4/5 (40 Downloads) |
Synopsis A Search for Dark Matter in Events with One Jet and Missing Transverse Energy in $p\bar{p}$ Collisions at $\sqrt{s} by :
We present the results of a search for dark matter production in the monojet signature. We analyze a sample of Tevatron pp collisions at √s = 1.96 TeV corresponding to an integrated luminosity of 6.7 fb−1 recorded by the CDF II detector. In events with large missing transverse energy and one energetic jet, we find good agreement between the standard model prediction and the observed data. We set 90% confidence level upper limits on the dark matter production rate. The limits are translated into bounds on nucleon-dark matter scattering rates which are competitive with current direct detection bounds on spin-independent interaction below a dark matter candidate mass of 5 GeV/c2, and on spin-dependent interactions up to masses of 200 GeV/c2.