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Search for New Phenomena in Events with One Energetic Jet and Large Missing Transverse Momentum in Proton-proton Collisions at √s

2013
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Release : 2013
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Book Synopsis Search for New Phenomena in Events with One Energetic Jet and Large Missing Transverse Momentum in Proton-proton Collisions at √s by : Valerio Rossetti

Download or read book Search for New Phenomena in Events with One Energetic Jet and Large Missing Transverse Momentum in Proton-proton Collisions at √s written by Valerio Rossetti. This book was released on 2013. Available in PDF, EPUB and Kindle. Book excerpt:

Search for New Phenomena in Final States with an Energetic Jet and Large Missing Transverse Momentum in Pp Collisions at S

2016
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Release : 2016
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Book Synopsis Search for New Phenomena in Final States with an Energetic Jet and Large Missing Transverse Momentum in Pp Collisions at S by :

Download or read book Search for New Phenomena in Final States with an Energetic Jet and Large Missing Transverse Momentum in Pp Collisions at S written by . This book was released on 2016. Available in PDF, EPUB and Kindle. Book excerpt: Results of a search for new phenomena in final states with an energetic jet and large missing transverse momentum are reported. The search uses proton-proton collision data corresponding to an integrated luminosity of 3.2 fb–1 at √s=13 TeV collected in 2015 with the ATLAS detector at the Large Hadron Collider. Events are required to have at least one jet with a transverse momentum above 250 GeV and no leptons. Several signal regions are considered with increasing missing-transverse-momentum requirements between EmissT > 250 GeV and EmissT > 700 GeV. Good agreement is observed between the number of events in data and Standard Model predictions. Here, the results are translated into exclusion limits in models with large extra spatial dimensions, pair production of weakly interacting dark-matter candidates, and the production of supersymmetric particles in several compressed scenarios.

Search for New Phenomena in Final States with an Energetic Jet and Large Missing Transverse Momentum in Pp Collisions at \(\sqrt{s{\mathrm{}}}

2015
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Release : 2015
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Book Synopsis Search for New Phenomena in Final States with an Energetic Jet and Large Missing Transverse Momentum in Pp Collisions at \(\sqrt{s{\mathrm{}}} by :

Download or read book Search for New Phenomena in Final States with an Energetic Jet and Large Missing Transverse Momentum in Pp Collisions at \(\sqrt{s{\mathrm{}}} written by . This book was released on 2015. Available in PDF, EPUB and Kindle. Book excerpt: Results of a search for new phenomena in final states with an energetic jet and large missing transverse momentum are reported. The search uses 20.3 fb-1 of \(\sqrt{s{\mathrm{}}} = 8\) TeV data collected in 2012 with the ATLAS detector at the LHC. Events are required to have at least one jet with pT>120 GeV and no leptons. Nine signal regions are considered with increasing missing transverse momentum requirements between EmissT>150 GeV and EmissT>700 GeV. Good agreement is observed between the number of events in data and Standard Model expectations. The results are translated into exclusion limits on models with either large extra spatial dimensions, pair production of weakly interacting dark matter candidates, or production of very light gravitinos in a gauge-mediated supersymmetric model. Limits on the production of an invisibly decaying Higgs-like boson leading to similar topologies in the final state are presented.

Search for Dark Matter with ATLAS

2016-06-29 Science
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Release : 2016-06-29
Genre : Science
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Book Rating : 458/5 ( reviews)

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Book Synopsis Search for Dark Matter with ATLAS by : Ruth Pöttgen

Download or read book Search for Dark Matter with ATLAS written by Ruth Pöttgen. This book was released on 2016-06-29. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Search for New Phenomena in Events with a Photon and Missing Transverse Momentum in Pp Collisions at $$ \sqrt{s}

2016
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Release : 2016
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Book Synopsis Search for New Phenomena in Events with a Photon and Missing Transverse Momentum in Pp Collisions at $$ \sqrt{s} by :

Download or read book Search for New Phenomena in Events with a Photon and Missing Transverse Momentum in Pp Collisions at $$ \sqrt{s} written by . This book was released on 2016. Available in PDF, EPUB and Kindle. Book excerpt: In this paper, results of a search for new phenomena in events with an energetic photon and large missing transverse momentum with the ATLAS experiment at the Large Hadron Collider are reported. The data were collected in proton-proton collisions at a centre-of-mass energy of 13 TeV and correspond to an integrated luminosity of 3.2 fb-1. The observed data are in agreement with the Standard Model expectations. Exclusion limits are presented in models of new phenomena including pair production of dark matter candidates or large extra spatial dimensions. In a simplified model of dark matter and an axial-vector mediator, the search excludes mediator masses below 710 GeV for dark matter candidate masses below 150 GeV. In an effective theory of dark matter production, values of the suppression scale M * up to 570 GeV are excluded and the effect of truncation for various coupling values is reported. Finally, for the ADD large extra spatial dimension model the search places more stringent limits than earlier searches in the same event topology, excluding M D up to about 2.3 (2.8) TeV for two (six) additional spatial dimensions; the limits are reduced by 20-40% depending on the number of additional spatial dimensions when applying a truncation procedure.

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