Global ETD Search
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Showing 1 to 10 of 10 for “"Bottom Quarks"”.
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Collinear singularities and the factorization scale in perturbative QCD
… First, we argue in favor of the use of a bottom-quark distribution function, which sums collinear logarithms, in the calculation of the cross section for Higgs-boson production in association with bottom quarks. As a testing ground for Higgs searches, we propose a measurement of Z-boson …
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SHEDDING LIGHT ON HIGGS BOSON SELF-INTERACTIONS IN THE BBƔƔ CHANNEL. PHOTON AND B-JET CALIBRATIONS, AND SEARCHES FOR HIGGS BOSON PAIRS WITH THE ATLAS EXPERIMENT.
… in the final state with two photons and two bottom quarks (bbγγ). The first analysis is a search for SM Higgs boson pairs (HH) in the bbγγ final state. No excess of events with respect to the SM background is observed. An observed upper limit of μHH < 4.0 is set at 95% confidence level (CL) …
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Neural-Network Based b-Tagging in the CMS Level 1 Trigger System
… for the identification of jets originating from bottom quarks in the CMS detector. The algorithm is designed for the timing constraints of the L1T, using seeded cone jet reconstruction of PUPPI algorithm objects as inputs. We present the input data, architecture, and training of the network with …
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Thomas Fermi model for mesons and new noise subtraction techniques in lattice QCD.
… energies are derived. We find that, on average, quarks only interact with antiquarks in such systems. The TF differential equation is constructed and systems with heavy-light quark content are examined. Three types of mesonic systems are defined. In the case of charm quarks, multi-charmonium, …
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Heavy quark interaction in Hot QCD matter: open charm and bottom production in relativistic Heavy-Ion Collisions
… Model. The basic constituents of QCD are quarks and gluons that are confined in hadronic matter: at high temperatures and/or densities quark deconfinement occurs and hadronic matter undergoes a phase transition into a new state of matter, the Quark-Gluon Plasma (QGP). Numerical solutions …
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A Charcuterie Platter of QCD Matter
… complicated three-dimensional dynamics of how quarks and gluons, the fundamental degrees of freedom of QCD, combine to form the observed bound states in nature called hadrons? I initiate a new formalism using Heavy Quark Effective Theory to study this dynamical process known as hadronization. I …
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Quantum Chromodynamics and the Precision Phenomenology of Heavy Quarks
… theory of observable quantities involving quarks and gluons, the strongly interacting particles of the SM. Such calculations form the most important class of corrections to observables and are vital if we are to untangle signals of New Physics from LHC data. We consider in particular the …
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Bottomonium Spectroscopy at Belle: Studies of Radiative and Hadronic Transitions
The large constituent quark mass of bottomonium, the bottom quark/anti-quark bound state $(bbbar)$, affords a rich spectroscopy in which the perturbative (non-relativistic) limit of Quantum Chromodynamics may be theoretically described and experimentally investigated. The radial excitations of …
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Aspects of Nonperturbative Heavy Quark Physics
The properties of charm and bottom quarks are an interesting corner of Quantum Chromo-Dynamics (QCD) due to the fact that their masses are much heavier than the typical QCD interaction energy ΛQCD. Due to this scale separation, it is possible to describe these heavy quarks by Effective Field …