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Search for Neutral Long-lived Particles in Pp Collisions at [square Root]s

2022
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Release : 2022
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Book Synopsis Search for Neutral Long-lived Particles in Pp Collisions at [square Root]s by : [Study Group] ATLAS Collaboration CERN

Download or read book Search for Neutral Long-lived Particles in Pp Collisions at [square Root]s written by [Study Group] ATLAS Collaboration CERN. This book was released on 2022. Available in PDF, EPUB and Kindle. Book excerpt: 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

A Search for Long Lived Neutral Particles Decaying to Hadronic States in Proton-proton Collisions in the ATLAS Detector at Sqrt(s)

2017
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Release : 2017
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Book Synopsis A Search for Long Lived Neutral Particles Decaying to Hadronic States in Proton-proton Collisions in the ATLAS Detector at Sqrt(s) by : Rachel Rosten

Download or read book A Search for Long Lived Neutral Particles Decaying to Hadronic States in Proton-proton Collisions in the ATLAS Detector at Sqrt(s) written by Rachel Rosten. This book was released on 2017. Available in PDF, EPUB and Kindle. Book excerpt: 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.

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

2022
Download 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 Online Free

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Release : 2022
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Book Synopsis 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 by : [Study Group] ATLAS Collaboration CERN

Download or read book 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 written by [Study Group] ATLAS Collaboration CERN. This book was released on 2022. Available in PDF, EPUB and Kindle. Book excerpt: 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

Search for Long-lived Resonance Decaying to a Dilepton Pair in Pp Collisions at [square Root of S]

2018 Dilepton production
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Release : 2018
Genre : Dilepton production
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Book Synopsis Search for Long-lived Resonance Decaying to a Dilepton Pair in Pp Collisions at [square Root of S] by : Siinn Che

Download or read book Search for Long-lived Resonance Decaying to a Dilepton Pair in Pp Collisions at [square Root of S] written by Siinn Che. This book was released on 2018. Available in PDF, EPUB and Kindle. Book excerpt:

Energy Research Abstracts

1990 Power resources
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Author :
Release : 1990
Genre : Power resources
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Book Synopsis Energy Research Abstracts by :

Download or read book Energy Research Abstracts written by . This book was released on 1990. Available in PDF, EPUB and Kindle. Book excerpt:

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