Advertisement

Topics

The Sea of Quarks and Antiquarks in the Nucleon.

07:00 EST 8th February 2019 | BioPortfolio

Summary of "The Sea of Quarks and Antiquarks in the Nucleon."

The quark and gluon structure of the proton has been under intense experimental and theoretical investigation for five decades. Even for the distributions of the well-studied valence quarks, challenges such as the value of the down quark to up quark ratio at high fractional momenta remain. Much of the sea of quark-antiquark pairs emerges from the splitting of gluons and is well described by perturbative evolution in quantum chromodynamics. However, experiments confirm that there is a non-perturbative component to the sea that is not well understood and hitherto has been difficult to calculate with ab initio non-perturbative methods. This non-perturbative structure shows up, perhaps most directly, in the flavor dependence of the sea antiquark distributions. While some of the general trends can be reproduced by models, there are features of the data that do not seem to be well described. This article discusses the experimental situation, the status of calculations and models, and the directions where these studies will progress in the near future.

Affiliation

Journal Details

This article was published in the following journal.

Name: Reports on progress in physics. Physical Society (Great Britain)
ISSN: 1361-6633
Pages:

Links

DeepDyve research library

PubMed Articles [25 Associated PubMed Articles listed on BioPortfolio]

Search for Pair-Produced Resonances Each Decaying into at Least Four Quarks in Proton-Proton Collisions at sqrts=13  TeV.

This Letter presents the results of a search for pair-produced particles of masses above 100 GeV that each decay into at least four quarks. Using data collected by the CMS experiment at the LHC in 20...

The Spin Structure of the Nucleon.

We review the present understanding of the spin structure of protons and neutrons, the fundamental building blocks of nuclei collectively known as nucleons. The field of nucleon spin provide...

Nucleon Matrix Elements of the Antisymmetric Quark Tensor.

If physics beyond the standard model enters well above the electroweak scale, its low-energy effects are described by standard model effective field theory. Already, at dimension 6, many operators inv...

Combination of the Searches for Pair-Produced Vectorlike Partners of the Third-Generation Quarks at sqrts=13  TeV with the ATLAS Detector.

A combination of the searches for pair-produced vectorlike partners of the top and bottom quarks in various decay channels (T→Zt/Wb/Ht, B→Zb/Wt/Hb) is performed using 36.1  fb^{-1} of pp colli...

Search for Leptoquarks Coupled to Third-Generation Quarks in Proton-Proton Collisions at sqrts=13  TeV.

Three of the most significant measured deviations from standard model predictions, the enhanced decay rate for B→D^{(*)}τν, hints of lepton universality violation in B→K^{(*)}ℓℓ decays, and ...

Clinical Trials [1 Associated Clinical Trials listed on BioPortfolio]

Social-Economics Profile of the Asthmatic Patients Attended at Nucleus of Integrated Medical Care

This study had a descriptive, retrospective, transversal character with quantitative approach, which aimed to delineate the social-economics profile of the asthmatic patients that used the...

Medical and Biotech [MESH] Definitions

None available.

Advertisement
Quick Search
Advertisement
Advertisement

 


DeepDyve research library

Searches Linking to this Article