Search for Neutral Long-lived Particles in Pp Collisions at [square Root]s PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Search for Neutral Long-lived Particles in Pp Collisions at [square Root]s PDF full book. Access full book title Search for Neutral Long-lived Particles in Pp Collisions at [square Root]s by [Study Group] ATLAS Collaboration CERN. Download full books in PDF and EPUB format.
![Search for Neutral Long-lived Particles in Pp Collisions at [square Root]s PDF](https://books.google.com/books/content/images/frontcover/-p_ezwEACAAJ?fife=w150-h200)
Author: [Study Group] ATLAS Collaboration CERN
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Get Book Here
Book Description
Abstract: A search for decays of pair-produced neutral long-lived particles (LLPs) is presented using 139 fb−1 of proton-proton collision data collected by the ATLAS detector at the LHC in 2015-2018 at a centre-of-mass energy of 13 TeV. Dedicated techniques were developed for the reconstruction of displaced jets produced by LLPs decaying hadronically in the ATLAS hadronic calorimeter. Two search regions are defined for different LLP kinematic regimes. The observed numbers of events are consistent with the expected background, and limits for several benchmark signals are determined. For a SM Higgs boson with a mass of 125 GeV, branching ratios above 10% are excluded at 95% confidence level for values of c times LLP mean proper lifetime in the range between 20 mm and 10 m depending on the model. Upper limits are also set on the cross-section times branching ratio for scalars with a mass of 60 GeV and for masses between 200 GeV and 1 TeV
![Search for Neutral Long-lived Particles in Pp Collisions at [square Root]s PDF](https://books.google.com/books/content/images/frontcover/-p_ezwEACAAJ?fife=w80-h100)
Author: [Study Group] ATLAS Collaboration CERN
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Get Book Here
Book Description
Abstract: A search for decays of pair-produced neutral long-lived particles (LLPs) is presented using 139 fb−1 of proton-proton collision data collected by the ATLAS detector at the LHC in 2015-2018 at a centre-of-mass energy of 13 TeV. Dedicated techniques were developed for the reconstruction of displaced jets produced by LLPs decaying hadronically in the ATLAS hadronic calorimeter. Two search regions are defined for different LLP kinematic regimes. The observed numbers of events are consistent with the expected background, and limits for several benchmark signals are determined. For a SM Higgs boson with a mass of 125 GeV, branching ratios above 10% are excluded at 95% confidence level for values of c times LLP mean proper lifetime in the range between 20 mm and 10 m depending on the model. Upper limits are also set on the cross-section times branching ratio for scalars with a mass of 60 GeV and for masses between 200 GeV and 1 TeV
Author: Rachel Rosten
Publisher:
ISBN:
Category :
Languages : en
Pages : 180
Get Book Here
Book Description
A search for the decay of a heavy scalar boson into pairs of long-lived neutral particles in \intlumi of proton proton collisions at $\sqrt{s}=8$~TeV and $3.2~\rm{fb}^{-1}$ at $\sqrt{s}=13$~TeV in the ATLAS detector is presented. The search focuses on final states where both long lived particles decay within the hadronic calorimeter of the detector, resulting in jets with unusual properties. No excess was observed and limits were set on the lifetime of the long lived particles for various combinations of scalar boson and long lived particle masses.
![A Search in the Two-photon Final State for Evidence of New Particle Production in Pp Collisions at [square Root] 8 PDF](https://books.google.com/books/content/images/frontcover/ijGFAQAACAAJ?fife=w80-h100)
Author: Rachel Paula Yohay
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Author: Peter Wagner
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
This dissertation presents the results of the first search for heavy, neutral, longlived particles that decay to photons at a hadron collider. We use a sample of +jet+missing transverse energy events in pp̄ collisions at s = 1.96 TEV taken with the Collider Detector at Fermilab. Candidate events are selected based on the arrival time of a high-energy photon at the electromagnetic calorimeter as measured with a timing system that was recently installed. The final result is that we find 2 events, using 570"34 pb−1 of data collected during 2004-2005 at the Fermilab Tevatron, consistent with the background estimate of 1.3"0.7 events.
![Search for New Particles Decaying to Dijets in PP̄ Collisions at [square Root Symbol] S PDF](https://books.google.com/books/content/images/frontcover/KoJNYAAACAAJ?fife=w80-h100)
Author: Chao Wei
Publisher:
ISBN:
Category : Hadron interactions
Languages : en
Pages : 286
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 22
Get Book Here
Book Description
Author: Shikma Bressler
Publisher:
ISBN:
Category :
Languages : en
Pages : 59
Get Book Here
Book Description
![Search for Decays of Stopped Long-lived Particles Produced in Proton-proton Collisions at [arrow]](https://books.google.com/books/content/images/frontcover/sLZMAQAACAAJ?fife=w80-h100)
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 22
Get Book Here
Book Description
![Measurement of WWW Production and Search for Supersymmetric Particles in Multi-lepton Final States in Pp Collisions at [square Root]8 PDF](https://books.google.com/books/content/images/frontcover/WW9zswEACAAJ?fife=w80-h100)
Author: Martina Javůrková
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
![Search for Events with a Pair of Displaced Vertices from Long-lived Neutral Particles Decaying Into Hadronic Jets in the ATLAS Muon Spectrometer in Pp Collisions at [square Root] S PDF](https://books.google.com/books/content/images/frontcover/r-bazwEACAAJ?fife=w80-h100)
Author: [Study Group] ATLAS Collaboration CERN
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Get Book Here
Book Description
Abstract: A search for events with two displaced vertices from long-lived particle (LLP) pairs using data collected by the ATLAS detector at the LHC is presented. This analysis uses 139 fb−1 of proton-proton collision data at √s=13 TeV recorded in 2015-2018. The search employs techniques for reconstructing vertices of LLPs decaying to jets in the muon spectrometer displaced between 3 and 14 m with respect to the primary interaction vertex. The observed numbers of events are consistent with the expected background and limits for several benchmark signals are determined. For the Higgs boson with a mass of 125 GeV, the paper reports the first exclusion limits for branching fractions into neutral long-lived particles below 0.1%, while branching fractions above 10% are excluded at 95% confidence level for LLP proper lifetimes ranging from 4 cm to 72.4 m. In addition, the paper present the first results for the decay of LLPs into t ̄t in the ATLAS muon spectrometer
