Results 11 to 20 of about 2,602,562 (177)

Search for a heavy top-quark partner in final states with two leptons with the ATLAS detector at the LHC [PDF]

open access: yes, 2012
Atlas Collaboration contributor: Paul Douglas Jackson and Nitesh Soni of School of Chemistry and Physics, University of Adelaide, North Terrace Campus, 5000, SA, Australia. Extent: 35p.The results of a search for direct pair production of heavy top-quark
G. Khoriauli   +999 more
core   +8 more sources

QCD at the amplitude level: Fock state interference in heavy quark electroproduction

open access: yesJournal of High Energy Physics, 2023
Quantum chromodynamics (QCD) rigorously predicts the existence of both nonperturbative intrinsic and perturbative extrinsic heavy quark contents of nucleons.
Valery E. Lyubovitskij, Ivan Schmidt
doaj   +1 more source

QCD light-cone distribution amplitudes of heavy mesons from boosted HQET

open access: yesJournal of High Energy Physics, 2023
Light-cone distribution amplitudes (LCDAs) frequently arise in factorization theorems involving light and heavy mesons. The QCD LCDA for heavy mesons includes short-distance physics at energy scales of the heavy-quark mass.
Martin Beneke   +3 more
doaj   +1 more source

A fragmentation-based study of heavy quark production

open access: yesJournal of High Energy Physics, 2020
Processes involving heavy quarks are a crucial component of the LHC physics program, both by themselves and as backgrounds for Higgs physics and new physics searches. In this work, we critically reconsider the validity of the widely-adopted approximation
Giovanni Ridolfi   +2 more
doaj   +1 more source

Heavy-quark spin symmetry breaking in the Born-Oppenheimer approximation

open access: yesJournal of High Energy Physics, 2023
Heavy-quark spin symmetry is explicitly broken by the mass splitting between a heavy-light pseudoscalar meson and its vector partner. This fact plays a pivotal role in the physics of states whose mass lies close to the threshold of an open-flavor meson ...
R. Bruschini
doaj   +1 more source

Flavor physics in the quark sector [PDF]

open access: yes, 2008
In the past decade, one of the major challenges of particle physics has been to gain an in-depth understanding of the role of quark flavor. In this time frame, measurements and the theoretical interpretation of their results have advanced tremendously. A
Smith, Christopher   +999 more
core   +1 more source

Prompt neutrinos and intrinsic charm at SHiP

open access: yesJournal of High Energy Physics, 2019
We present a new evaluation of the far-forward neutrino plus antineutrino flux and number of events from charm hadron decays in a 400 GeV proton beam dump experiment like the Search for Hidden Particles (SHiP).
Weidong Bai, Mary Hall Reno
doaj   +1 more source

A self-consistent framework of topological amplitude and its SU(N) decomposition

open access: yesJournal of High Energy Physics, 2021
We propose a systematic theoretical framework for the topological amplitudes of the heavy meson decays and their SU(N) decomposition. In the framework, the topologies are expressed in invariant tensors and classified into tree- and penguin-operator ...
Di Wang, Cai-Ping Jia, Fu-Sheng Yu
doaj   +1 more source

Screening of the QCD heavy quark potential at finite temperature [PDF]

open access: yes, 1988
Karsch F, Wyld HW. Screening of the QCD heavy quark potential at finite temperature. Physics Letters, B.
Karsch, Frithjof, Wyld, H W, Wyld, H. W.
core   +1 more source

Heavy quark physics on the lattice with improved nonrelativistic actions [PDF]

open access: yes, 2010
Hadrons containing heavy quarks, in particular b quarks, play an important role in high energy physics. Measurements of their electroweak interactions are used to test the Standard Model and search for new physics.

core   +2 more sources

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