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A search for standard model Higgs bosons (H) produced with transverse momentum ($p_\mathrm{T}$) greater than 450 GeV and decaying to bottom quark-antiquark pairs ($\mathrm{b\bar{b}}$) is performed using proton-proton collision data…

高能物理 - 实验 · 物理学 2020-12-16 CMS Collaboration

We discuss jet substructure in recombination algorithms for QCD jets and single jets from heavy particle decays. We demonstrate that the jet algorithm can introduce significant systematic effects into the substructure. By characterizing…

高能物理 - 唯象学 · 物理学 2014-11-20 Stephen D. Ellis , Christopher K. Vermilion , Jonathan R. Walsh

We apply object detection techniques based on deep convolutional blocks to end-to-end jet identification and reconstruction tasks encountered at the CERN Large Hadron Collider (LHC). Collision events produced at the LHC and represented as…

Boosted resonances is a highly probable and enthusiastic scenario in any process probing the electroweak scale. Such objects when decaying into jets can easily blend with the cornucopia of jets from hard relative light QCD states. We review…

高能物理 - 唯象学 · 物理学 2015-05-30 Leandro G. Almeida , Raz Alon , Michael Spannowsky

We calculate the subjet rates for jets produced in hadron collisions. The kt algorithm is used to define the jets and allows the theoretical calculation to sum both the leading and next-to-leading logarithms in the resolution variable,…

高能物理 - 唯象学 · 物理学 2010-02-03 J. R. Forshaw , M. H. Seymour

New particles beyond the Standard Model might be produced with a very high boost, for instance if they result from the decay of a heavier particle. If the former decay hadronically, then their signature is a single massive fat jet which is…

高能物理 - 唯象学 · 物理学 2018-01-17 J. A. Aguilar-Saavedra , Jack H. Collins , Rashmish K. Mishra

Future experiments beyond the LHC era will measure high-momentum bosons ($W$, $Z$, $H$) and top quarks with strongly collimated decay products that form hadronic jets. This paper describes the studies of the performance of jet substructure…

高能物理 - 实验 · 物理学 2019-02-12 C. -H Yeh , S. V. Chekanov , A. V. Kotwal , J. Proudfoot , S. Sen , N. V. Tran , S. -S Yu

$N$-subjettiness ratios are in wide use for tagging heavy boosted objects, in particular the ratio of 2-subjettiness to 1-subjettiness for tagging boosted electroweak bosons. In this article we introduce a new, \emph{dichroic} ratio, which…

高能物理 - 唯象学 · 物理学 2017-04-05 Gavin P. Salam , Lais Schunk , Gregory Soyez

Boosted top quark tagging is one of the challenging, and at the same time exciting, tasks in high energy physics experiments, in particular in the exploration of new physics signals at the LHC. Several techniques have already been developed…

高能物理 - 唯象学 · 物理学 2023-08-09 Amit Chakraborty , Amandip De , Rohini M. Godbole , Monoranjan Guchait

I present a new scheme for tagging boosted heavy flavor jets called "$\mu_x$ tagging" and its application to TeV-scale physics beyond the Standard Model. Using muons from B hadron decay to define a particular combination "x" of angular…

高能物理 - 唯象学 · 物理学 2016-05-16 Zack Sullivan

Jets from boosted heavy particles have a typical angular scale which can be used to distinguish them from QCD jets. We introduce a machine learning strategy for jet substructure analysis using a spectral function on the angular scale. The…

高能物理 - 唯象学 · 物理学 2018-10-31 Sung Hak Lim , Mihoko M. Nojiri

This paper describes a study of techniques for identifying Higgs bosons at high transverse momenta decaying into bottom-quark pairs, $H \rightarrow b\bar{b}$, for proton-proton collision data collected by the ATLAS detector at the Large…

高能物理 - 实验 · 物理学 2019-11-18 ATLAS Collaboration

The irreducible background from Z(nunu)+jets, to beyond the Standard Model searches at the LHC, can be calibrated using gamma+jets data. The method utilises the fact that at high vector boson pT, the event kinematics are the same for the…

高能物理 - 唯象学 · 物理学 2015-05-28 S. Ask , M. A. Parker , T. Sandoval , M. E. Shea , W. J. Stirling

We reanalyze the extraction of the heavy Higgs boson signal $H\rightarrow W^+W^-\rightarrow \bar\ell\nu,\ell\bar\nu$ $(\ell=e\hbox{ or }\mu)$ from the Standard Model background at hadron supercolliders, taking into account revised estimates…

高能物理 - 唯象学 · 物理学 2016-09-01 V. Barger , Kingman Cheung , T. Han , D. Zeppenfeld

Assuming that a non-standard neutral Higgs with an enhanced Yukawa coupling to a bottom quark is observed at future hadron experiments, we propose a method for a better understanding of the Higgs sector. Our procedure is based on "counting"…

高能物理 - 唯象学 · 物理学 2009-11-10 David Atwood , Shaouly Bar-Shalom , Gad Eilam , Amarjit Soni

A search for the standard model (SM) Higgs boson (H) produced with transverse momentum greater than 450 GeV and decaying to a charm quark-antiquark ($\mathrm{c\bar{c}}$) pair is presented. The search is performed using proton-proton…

高能物理 - 实验 · 物理学 2023-07-31 CMS Collaboration

We study the Standard Model Higgs and vector boson associated production with large transvese momentum at the 13 TeV LHC, followed by Higgs decay to bottom quark pair. Using mass-drop tagging and filtering techiques, we obtained the cross…

高能物理 - 唯象学 · 物理学 2017-01-31 Fang Tian

This paper reports a detailed study of techniques for identifying boosted, hadronically decaying $W$ bosons using 20fb$^{-1}$ of proton-proton collision data collected by the ATLAS detector at the LHC at a centre-of-mass energy $\sqrt{s} =$…

高能物理 - 实验 · 物理学 2016-03-24 ATLAS Collaboration

Jet substructure techniques are playing an essential role in exploring the TeV scale at the Large Hadron Collider (LHC), since they facilitate the efficient reconstruction and identification of highly-boosted objects. Both for the LHC and…

高能物理 - 唯象学 · 物理学 2018-01-11 Evan Coleman , Marat Freytsis , Andreas Hinzmann , Meenakshi Narain , Jesse Thaler , Nhan Tran , Caterina Vernieri

Jets can be used to probe the physical properties of the high energy density matter created in collisions at the Relativistic Heavy Ion Collider (RHIC). Measurements of strong suppression of inclusive hadron distributions and di-hadron…

核实验 · 物理学 2019-08-13 Sevil Salur