Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “HIGGS”

Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 199 records · Page 11
All sourcesNASA NTRSDOE OSTI
DOE OSTI2016

Search for the Standard Model Higgs boson produced by vector-boson fusion and decaying to bottom quarks in $ \sqrt{s}=8 $ TeV pp collisions with the ATLAS detector

A search with the ATLAS detector is presented for the Standard Model Higgs boson produced by vector-boson fusion and decaying to a pair of bottom quarks, using 20.2 fb -1 of LHC proton-proton collision data at √s=8 TeV. The signal is searched for as a resonance in the invariant mass distribution of a pair of jets containing b-hadrons in vector-boson-fusion candidate events. The yield is measured to be -0.8 ± 2.3 times the Standard Model cross-section for a Higgs boson mass of 125 GeV. The upper limit on the cross-section times the branching ratio is found to be 4.4 times the Standard Model cross-section at the 95% confidence level, consistent with the expected limit value of 5.4 (5.7) in the background-only (Standard Model production) hypothesis.[Figure not available: see fulltext.]

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
DOE OSTI2019

Search for associated production of a Higgs boson and a single top quark in proton-proton collisions at s =13 TeV

A search is presented for the production of a Higgs boson in association with a single top quark, based on data collected in 2016 by the CMS experiment at the LHC at a center-of-mass energy of 13 TeV, which corresponds to an integrated luminosity of 35.9 fb-1. The production cross section for this process is highly sensitive to the absolute values of the top quark Yukawa coupling, yt; the Higgs boson coupling to vector bosons, gHVV; and, uniquely, their relative sign. Analyses using multilepton signatures, targeting H→WW, H→ττ, and H→ZZ decay modes, and signatures with a single lepton and a bb pair, targeting the H→bb decay, are combined with a reinterpretation of a measurement in the H→γγ channel to constrain yt. For a standard model-like value of gHVV, the data favor positive values of yt and exclude values of yt below about -0.9ytSM.

60 APPLIED LIFE SCIENCES↗
DOE OSTI2011

Search for a Very Light CP-Odd Higgs Boson in Top Quark Decays from pp̄ Collisions at √s=1.96 TeV

We present the results of a search for a very light CP-odd Higgs boson a 0 1 originating from top quark decays t→H ± b→W ±(*) a 0 1 b, and subsequently decaying into τ⁺τ⁻. Using a data sample corresponding to an integrated luminosity of 2.7 fb⁻¹ collected by the CDF II detector in pp̄ collisions at 1.96 TeV, we perform a search for events containing a lepton, three or more jets, and an additional isolated track with transverse momentum in the range 3 to 20 GeV/c. Observed events are consistent with background sources, and 95% C.L. limits are set on the branching ratio of t→H ± b for various masses of H ± and a 0 1 .

Aaltonen, T.↗
DOE OSTI2012

A Search for Dark Higgs Bosons

Recent astrophysical and terrestrial experiments have motivated the proposal of a dark sector with GeV-scale gauge boson force carriers and new Higgs bosons. We present a search for a dark Higgs boson using 516 fb{sup -1} of data collected with the BABAR detector. We do not observe a significant signal and we set 90% confidence level upper limits on the product of the Standard Model-dark sector mixing angle and the dark sector coupling constant.

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
DOE OSTI2016

Search for Higgs and Z Boson Decays to Φ γ with the ATLAS Detector

Here a search for the decays of the Higgs and Z bosons to a $\phi$ meson and a photon is performed with a pp collision data sample corresponding to an integrated luminosity of 2.7 fb -1 collected at $\sqrt{s}$ = 13 TeV with the ATLAS detector at the LHC. No significant excess of events is observed above the background, and 95% confidence level upper limits on the branching fractions of the Higgs and Z boson decays to $\phi$γ of 1.4 × 10 -3 and 8.3 x 10 -6 , respectively, are obtained.

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
DOE OSTI2017

Search for the Dimuon Decay of the Higgs Boson in p p Collisions at s = 13 TeV with the ATLAS Detector

A search for the dimuon decay of the Higgs boson was performed using data corresponding to an integrated luminosity of 36.1 fb -1 collected with the ATLAS detector in p p collisions at √ s = 13 TeV at the Large Hadron Collider. No significant excess is observed above the expected background. The observed (expected) upper limit on the cross section times branching ratio is 3.0 (3.1) times the Standard Model prediction at the 95% confidence level for a Higgs boson mass of 125 GeV. Finally, when combined with the p p collision data at √ s = 7 TeV and √ s = 8 TeV , the observed (expected) upper limit is 2.8 (2.9) times the Standard Model prediction.

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
DOE OSTI2017

Comparison of the processes of Higgs boson pair production and associated production of a radion and a Higgs boson

It is demonstrated that a radion and a Higgs boson are similar up to the replacement of masses and coupling constants (m {sub r }→ m {sub h }and Λ{sub r }→ v {sub 0}) in the processes of their single production and the additional rescaling of the coupling constant at the cubic self-action of a Higgs boson (1→1+((m{sub r}{sup 2}−m{sub h}{sup 2})/(3m{sub h}{sup 2}))) in the processes of their associated production.

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
DOE OSTI2016

100 TeV pp collisions, Higgs type, PYTHIA8 generator: tev100pp_higgs_pythia8_ptbins

Higgs production in bins of PhaseSpace:mHatMin. Cross sections depend on pT and not given. All Higgs decays are included. 2000 events per file, 50 files per pT bin. Cross sections are included in the log files. How to decode name: Name: tev100_pythia8_ptPTMIN_PTMAX_NUMBER.promc where PTMIN is min pT for PhaseSpace:ptHatMin, PTMAX - PhaseSpace:pTHatMax*2, NUMBER corresponds to the cluster production node. When you run, use "PTMIN-PTMAX" ranges. The actual cut on PhaseSpace:pTHatMax=2*PTMAX to reduce fluctuations on the tails. How to use: To get a sample with a given pT, use "glob" regular expressions (in Jython, Python etc). Example for the code: pT>100 corresponds to "glob.glob(*pt100_*)". Slimmed as: Particle records are slimmed (all stable with pT>0.3 GeV) and (PID=5 || PID=6) or PID>22 && PID<38) or PID>10 && PID<17).

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
DOE OSTI2015

8 TeV pp collisions, Higgs type, FPMC generator: tev8pp_higgs_excl_fpmc

FPMC: Forward Physics Monte Carlo. Exclusive Higgs production. The Higgs production is based on Khoze, Martin and Ryskin (KMR) model. More details in http://arxiv.org/abs/1008.0255v1. Herwig6 is used to hadronize events. Other details are in the logfiles.

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗