Inclusive production of X$\to b\bar{b}$ plus a recoil for the LHC Run-II

Abstract

This letter presents a study of the inclusive production of X$\to b\bar{b}$ plus a recoil, using simulated samples of $pp$ collisions at $\sqrt{s}=14$ TeV for an integrated luminosity in the range between 30 fb${}^{-1}$ to 3 ab${}^{-1}$. The case for experiments to include un-prescaled $b$-tag multijet triggers for this topology is made and the ideal jet thresholds are discussed. The sensitivity to Standard Model Higgs with a transverse momentum of at least 200 GeV is evaluated with respect to a continuous background, dominated by multijet processes. The mass of $b$-jet-pairs is analysed, quoting sensitivity to cross-sections in the range of 1 to 2 pb, for 100 fb${}^{-1}$, covering the Higgs production cross section of 1.8 pb. The trigger strategy presented in this letter is compared to triggers already in use, showing an increase on the signal efficiency for masses below 200 GeV and a performance comparable to a logic OR of all the currently available akin triggers for higher masses. The robustness of the expected sensitivity against systematic uncertainties is estimated by considering various typical sources, such as those on the fitting parameters of the continuous background, shape uncertainties affecting the signal acceptance and the background modelling. The accuracy of a Higgs production cross section measurements is also discussed, quoting sensitivity to deviations of 50% for 100 fb${}^{-1}$ and 10% for 3 ab${}^{-1}$.

6 pages, 7 figures

References in corpus (16)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• Event generation with SHERPA 1.1
• Jet substructure as a new Higgs search channel at the LHC
• MCFM for the Tevatron and the LHC
• HistFitter software framework for statistical data analysis
• Search for high-mass diboson resonances with boson-tagged jets in proton-proton collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
• Search for the Standard Model Higgs boson produced in association with top quarks and decaying into $b\bar{b}$ in pp collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
• Search for the standard model Higgs boson produced through vector boson fusion and decaying to b bbar
• Resolving the Higgs-Gluon Coupling with Jets
• Search for a massive resonance decaying into a Higgs boson and a W or Z boson in hadronic final states in proton-proton collisions at sqrt(s) = 8 TeV
• Measuring the Higgs-bottom coupling in weak boson fusion
• Resolving Boosted Jets with XCone
• Measurement of the cross section of high transverse momentum $Z\to b\bar{b}$ production in proton--proton collisions at $\sqrt{s}=8TeV$ with the ATLAS Detector
• Boosted Higgs $\to b\bar{b}$ in vector-boson associated production at 14 TeV
• Measuring the signal strength in ttH with H->bb